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Bending and Torsion Testing

Bending and torsion tests are performed by rotating a material or component to a certain degree with a certain force or until the material fails. The rotational force of a torsion test is applied by attaching one end of the material. In this way, one end of the tested material is fixed, while the other end is rotated and the material is rotated around its own axis. If the rotational motion is to be applied to both ends of the material, the ends are rotated in opposite directions.

With bending and torsion tests, the behavior of a material under bending or torsional forces is determined as a result of applied moments that cause shear stress on the axis. At the end of these tests, the limit of flexibility in shear, shear strength, torsional fatigue life, ductility, ultimate shear strength and shear fracture value are determined. These values ​​are similar, but test results are important in production work to simulate the material's service conditions, to check the quality and design of the product, and to ensure that it is manufactured correctly.

Bending and torsion tests identify three general forms in material: failure, proof, and operational. Torsion tests for failure are designed to measure the bending of the material under test and the resistance of the material until it breaks. Torsion tests to provide evidence are designed to observe the material under a certain load over a period of time. Torsion tests to determine operational strength, on the other hand, are designed to measure the performance of the material under expected service conditions. All of these test patterns can be performed for any material, or it can be performed with only torsional loading or a combination of torsional axial loading, depending on the properties of the material to be determined.

Many materials used in various industries can be subjected to bending and torsional forces during application. To determine this, bending and torsion tests are needed. For example, materials used in structural, biomedical, and automotive applications are among the most common materials that experience bending and torsion. Often used in the form of fasteners, rods, beams, pipes and wires, these materials can be made of metal, plastic, wood, polymer, composite or ceramic.

There are numerous domestic and foreign standards taken into account in bending and torsion tests. Here are a few of them:

  • TS EN ISO 80369-1 Small probe fittings for liquids and gases in health care applications - Part 1: General specifications
  • TS ISO 7800 Metallic materials - Wire - Simple torsion test
  • TS EN 10305-5 Steel tubes for precision applications - Technical delivery conditions - Part 5: Cold-dimensioned, welded, square and rectangular tubes
  • ISO 6475 Surgical implants - Metal bone screws with asymmetrical grooved and spherical underground surface - Mechanical requirements and test methods
  • ASTM A938-18 Standard test method for wire torsion testing
  • ASTM D1043-16 Standard test method for the hardness properties of plastics as a function of temperature with a torsion test
  • ASTM D5279-13 Standard test method for plastics - Dynamic mechanical properties - Torsion
  • ASTM E2207-15 Standard practice for stress-controlled axial-torsion fatigue testing with thin-walled pipe samples
  • ASTM F383 Static bending and torsion testing of intramedullary rods
  • ASTM F543-17 Standard specification and test methods for metallic medical bone screws

Our company also provides bending and torsion testing services within the scope of other testing services. Thanks to these services, enterprises are able to produce more efficient, high performance and quality products in a safe, fast and uninterrupted manner.

Bending and torsion testing services provided by other testing services are only one of the services provided by our organization in this respect. Many other testing services are also available.

IECEE Test and Certificate

The IECEE system is a multilateral certification system developed by IEC for electrotechnical equipment and components, based on international standards.

IEC (International Electrotechnical Commission) was founded in 1906 and is a semi-official non-profit organization. Members of this organization are national committees. Its members consist of experts and delegates from the sector, governmental organizations, associations and universities to participate in the organization's technical and conformity assessment.

The global organization, the International Electrotechnical Commission (IEC), publishes consensus-based international standards and manages conformity assessment systems for electrical and electronic products, systems and services, commonly known as electrotechnology. Publications by this organization serve as a basis for national standards and serve as a reference for the preparation of international tenders and contracts.

Members of the IECEE system have adopted the principle of mutual recognition of test results, ie mutual acceptance, for certification and approval at national level around the world.

IECEE plans show the safety, quality, efficiency and overall performance of electrical and electronic components, devices and equipment used in offices, residences, health care facilities, workshops and similar areas. In this scope, electrical and electronic equipment and testing services have been determined in total 23 categories.

All IECEE plans are based on IEC international standards. In this respect, it is truly global in concept and application. These plans aimed to reduce the trade barriers caused by different certification criteria in different countries and to help the sector reach new markets. Delays and costs have been eliminated due to previous multiple tests. Briefly, each IECEE diagram means a test, a document.

Today, around 50 countries, including our country, have been included in the IECEE system. However, in countries that do not yet base their national standards on IEC international standards, national differences are considered within the scope of the application, provided that they are declared. However, in order to ensure the successful implementation of the IECEE system, national standards need to be aligned with the relevant IEC international standards.

The organizations that will implement the IECEE system are the national certification bodies (NCB) of the countries. These organizations use test laboratories known as CB Test Laboratories (CBTL) for testing and evaluation studies.

There are generally three groups of tests in these laboratories:

  • Type tests: Electrical and electronic devices and equipment samples are made on. They are generally comprehensive and destructive tests and comply with relevant standards.
  • Routine tests: Each device and equipment is done and non-destructive. It is not very comprehensive and is generally intended to identify unacceptable differences in material.
  • Field tests: These tests are performed on random samples taken from the market. These tests, called market surveillance, are also not exhaustive and non-destructive.

In all three cases, the safety, reliability and performance of products and systems are determined and certified as an independent and independent third party.

The main benefit of IECEE testing and certification is that the system provides mutual recognition of compliance certificates worldwide. At the same time, when national government agencies, retailers, buyers and sellers accept the IECEE test certificate and associate the test report to the product, it provides direct access to global markets.

The IECEE system is available worldwide, including in non-IEC countries.

Our company also provides IECEE test and certification services within the scope of certification services. Thanks to these services, enterprises are able to produce more efficient, high performance and quality products in a safe, fast and uninterrupted manner.

IECEE testing and certification services are just one of the certification services provided by our organization. Many other certification services are provided.

Vibration Testing Laboratory

The vibration test simulates the conditions that a product or structure may see under a test environment during its lifetime. The vibration test can be used to avoid unexpected performance or premature failure in the field to ensure that the products are intact and operate safely during operation or transit.

The vibration test is generally performed to simulate a forcing function to a structure by using a vibration test shaker or vibration test machine. It is used in laboratory or production line for various things such as stimulated vibrations, vibration tests or agitation tests, suitable products during design, meeting standards, regulatory characteristics (eg MIL-STD 810G, etc.), Vibration test, fatigue test, screening.

The element has extensive experience in vibration testing services and our vibration laboratories have electro-dynamic and servo-hydraulic systems capable of replicating low and high frequency conditions. The vibration test can be completed while the product is running, including electrical and hydraulic, and can be performed with extreme temperatures.

From the smallest components to the largest and most demanding aerospace and military testing programs, TURCERT can ensure that your product is tested and certified to the highest standards for the given market. Utilizing state-of-the-art control systems, you can perform field data replication and ensure that the test sample is suitable for the job, as well as delivering specified test levels to meet your needs.

Impact and Vibration Tests

türcert the vibration test services in Turkey, including the following most recent defense, aerospace, commercial transportation and helps to meet the requirements;

  • Random
  • Sinusoidal
  • Resonance Search and Housing
  • Random Narrow Band Random
  • Random in Sinus
  • Combined Temperature and Vibration
  • Helicopter Rotor Frequency Simulation
  • Weapon Fire Simulation
  • SRS
  • Vibration off blade (loss of motor fan blade and wind filling)

Products and performance evaluation

Electrodynamic and servo hydraulic mixers are often used, depending on the frequency range and displacement required. EUROLAB systems, which have a long history of TURCERT technology, carry out these tests with industry-standard electrodynamic vibration and shaking equipment for vibration tests, impact vibration tests and shaker tests. EUROLAB performs the necessary tests with all devices in the key position, from electrodynamic shakers to intuitive and advanced vibration controllers.

Electrodynamic (ED) shakers are suitable for most vibration tests and offer several advantages over alternative approaches. Compared with hydraulic mixers, ED shakers are capable of much higher frequencies. These high frequencies can be very important in testing electronic and electronic components. ED shakers can also produce a wide range of shock and SRS pulses in addition to the general vibration test. Finally, the ED shaker has a very linear behavior, so it may be possible to check the vibration test.

Data Physics vibration testing equipment provides a complete range of shock and vibration tests, including force generation, control and measurement. Many advanced features have been added to both hardware and software to provide state-of-the-art solutions for shock and vibration testing so that vibration testing can be performed at specific frequencies.

Vibration test

  1. Resonant calls and dwells
  2. Custom fixture design and production
  3. Fixture resonance evaluation
  4. Combined vibration and environment
  5. Electrodynamic (ED) shakers can be used for Accelerated Tensile Testing (AST)
  6. Voltage monitoring during vibration

Vibration capabilities

  • Shaker type: Electrodynamics (ED)
  • Vibration types: sine, random, random random, random random 
  • Axis: Single
  • Stroke: up to 3 p pk-pk
  • Force: up to 25.000 lbf
  • Acceleration: 227 Gpk Bare Table
  • 92 Gpk to 160lbs
  • 44 Gpk to 460 £
  • 27 Gpk to 800 lbs
  • Speed: intermittent 80 in / sec, 105 in / sec
  • Load: up to 1000 pounds (higher for special tests for mass balance)

Mechanical Shock Capacities

  • Shaker type: Electrodynamics (ED)
  • Axis: Single
  • Stroke: up to 3 p pk-pk
  • Acceleration / duration: 330G / 4ms to 50lbs
  • 250 G / 6ms to 80 pounds
  • 135 £ / 100ms for 11ms
  • 80 £ / 70 to 70 lbs
  • 50 £ / 18 to 500 £
  • Load: up to 1000 pounds (higher for special tests for mass balance)

Shock Abilities

  • Shock type: half sine, sawtooth, trapezoid
  • Acceleration / time: 1000G / 1 ms, 500G / 2.5 ms, 200G / xx ms, 100G / xx ms, etc.
  • Load capacity: up to 1000 lb

Vibration / Mechanical Shock Special Capabilities

  1. Sample path or event data and replication
  2. Use of Fatigue Damage Spectrum (FDS) to accelerate vibration levels and reduce timing
  3. Shock response spectrum (SRS) test

Vibration Fixture
design:

  1. Custom test fixture design (Solid Works)
  2. Accept client data in native Solid Works, Parasolid, IGS, or STP formats.
  3. Finite Element Analysis (FEA) using Algorithm if necessary
  4. Consider animation resonance examples
  5. Consider project examples (RF cable bracket wind rating, shortened)

Fabrication:

  1. Custom Test Fixture Manufacturing
  2. machining
  3. Aluminum, Steel, MIG, TIG
  4. Easy access to CNC machining, laser, water jet, wire EDM cutting and powder coating painting

Test Sample Supplement:

  • Vibration adapter plates use 2 / 3 ”-8 holes in 16” centers
  • Plate sizes range from 12 ”x 12” to 72 ”x 72,, where 24” x 24 ”is the most common

Highly Accelerated Life Test (HALT) Capabilities -

  • Ramp / programmable
  • Table: Up to the surface of 4 'x 4'
  • Height: up to 35 "
  • Temperature range: -80 ° C to 180 ° C typical, -100 ° C to 200 ° C intermittent
  • Thermal ramp rate: 50 up to ° C / min
  • Vibration type: pneumatic air hammer semi-random 6 axis
  • Acceleration: 50G's rms below 3kHz, 70G's rms below 10kHz
  • Frequency range: 100 to 10.000Hz

Fault Mode Verification Test (FMVT®) Capabilities

  • FMVT® is a process that can be performed in a variety of ways, often using an Intertek patented resonance pulse vibration pod in applications to uncover real-world failure modes to aid reliability growth.
  • Ramp / programmable
  • Six-axis FMVT vibration pod
  • Room dimensions: 71 "x 54" x 47 "high
  • Temperature range: -80 ° C to 180 ° C typical 
  • Thermal ramp rate: 30 up to ° C / min
  • Acceleration: 50Gpk
  • Frequency range: 1 to 10.000Hz

In addition to vibration tests, TÜRCERT provides the following services;

  • Vibration and Shock Environmental Test Types
  • Multishaker Test
  • Vibration Qualification and R & D
  • Package Testing
  • Earthquake Test
  • Satellite Vibration Test
  • Turbine Blade High Cycle Fatigue Test
  • Environmental stress screening

Standards We Tested:

  • GMW 3172
  • GMW 3431
  • GMW 8287
  • GMW 15570
  • GMW 3191
  • GM 9123P
  • Ford CETP 00.00-L-412
  • Ford WCR 00.00EA-D11
  • Chrysler PF-8982
  • Toyota TSC7000G
  • Nissan Design Features 25100NDS00 [11]
  • Hyndai / Kia Engine ES95400-10

You can contact TÜRCERT for our vibration tests.

Shock Test

In product qualification programs, shock testing is used to measure the effect of sudden acceleration caused by explosion, falling or collision. Our laboratories perform shock tests to prepare products for demanding industrial, transport and military environments.

Sometimes compared to the vibration test, the shock test uses a certain force to simulate real-world use. Using an accelerometer to calculate speed and force, the components are subjected to loads up to 50.000 g in less than a second. Our laboratories then evaluate the product for damage and stress and ensure that it meets the demands of the work environment.

TÜRCERT's expert team applies shock tests to a variety of industrial and military standards including RTCA DO-160, MIL-STD-810G, DEF STAN 00-35 and TS EN 60068 Our engineers can also support complex or specific projects. protocol development or specification selection.

TÜRCERT Advantage

As a global laboratory platform, we have the expertise and capacity to deliver accurate results on time and within budget. Our experts understand the time-critical nature of qualification testing and are a single-source provider for reliable testing and certification. TÜRCERT is your test partner for even the most demanding projects.

Shock test methods

Shock tests are used to measure the effect of sudden acceleration due to collision, falling or explosion to simulate the conditions that the product may encounter in life.

Our laboratories are able to meet a wide range of mechanical shock test requirements. 

Some of the methods we routinely tested include:

  • Operational shock and collision safety
  • Gunfire simulation
  • Half sine (shock pulse) test
  • Decaying sine wave test
  • Impact / shock test
  • Shock and impulse test
  • Drop test
  • Impact test

The shock test consists of shock impacts, eg half sine, haversin, saw tooth and trapezoid. Pyroshock and ballistic shock tests require professionalism and are not considered classic shocks. Conventional shocks can be performed on Electro Dynamic (ED) Shakers, Free Fall Drop Tower or Pneumatic Shock Machines. The parameters required to define a shock test are the peak acceleration expressed in Gs or m / sec ^ 2, the shape of the impulse, and the duration in milliseconds. The classic shock strike occurs when the shock table suddenly changes direction. This sudden change in direction causes a rapid change in velocity that creates a shock or acceleration impulse.

Conventional shocks are applied in one direction and one axis at a time. Most features require the product to be shocked in both positive and negative directions along each axis. If shock tests are performed on an ED shaker, the shaker can reverse polarity and shock in both directions of each axis without rotating the fixture and sample. When performing a shock test on a shock machine, the machine may only shock in one direction and in one direction. The fixture and sample must be rotated to apply shocks along different directions and axes.

Stage shock tests are very different using an ED shaker in a shock machine. To create a shock in the shock machine, the shock table is raised up to a predetermined height. The table is released, then falls down or accelerates, affecting a shock programmer. The table allows the shock programmer to change direction and speed very quickly. Finally, the table is stopped before a second effect occurs. The shock programmer is typically rubber or felt material, lead pellets or special gas cylinders.

When performing shocks on an ED shaker, the control software determines how to move the shaker tray and generate the impulse. The user must enter parameters such as shock type, G Level and duration in the software. Shock programmers are not used. The table is moved suddenly by the ED shaker and controller.

Half Sine Shock Test

A half sine shock pulse has a shape of a half sine wave. The shock is the peak acceleration of approximately 11 G over a period of time of 150 milliseconds. Shock programmers for half sine shocks are usually rubber or felt.

Haversine Shock Test

There is not much difference between half-sinus shock and Haversine Shock. The half sine pulse shape is slightly more rounded than the pulse shape of the havers. The ED shaker controller can distinguish them.

Saw tooth shock test

A Sawtooth Shock has the shape of a triangle that resembles the teeth of a saw blade. The shock is the 11 G peak acceleration for a period of 20 milliseconds. The blue mark is on the base of the fixture and is red and green with the product's tested response. It is noted that the product plays on the red mark after the shock is applied. Shock programmers for saw tooth shocks are typically deformable lead pellets.

Trapezoid (Rectangular or Square) Shock Test

A Trapezoidal Impulse is defined as a Rectangular or Square Shock. A trapezoid shock is a rectangular or square shape. Shock is typically shown in trapezoid shock. Trapezoid shock is the 10 G peak acceleration for a period of 50 milliseconds. The edges of prickly lightning have a slight rise and fall time, so they are not vertical. For trapezoid shocks, shock programmers usually apply to aluminum honeycomb material or gas cylinders.

Drop and Drop Test

Drop tests are widely used for product fragility assessment, prototype testing, package and cushion assessment, and compliance with military standards. There are many different drop tests from released boxes to guide rail test equipment.

You can contact TÜRCERT for shock tests.

Energy Efficiency Tests

In a statement made by the Ministry of Economy very recently, it was stated that energy efficiency tests will be started to be carried out in imported led bulbs, electric motors, televisions, coolers, air conditioners, ovens, dishwashers and washing machines. In this way, it is aimed to increase energy efficiency and save electricity in these electrical devices. This application is also an important development in terms of reducing the negative effects of electrical devices on the natural environment while working. Likewise, considering that we are foreign-dependent in energy, this decision is a decision that will also contribute to the closing of our country's current account deficit.

In general, a strict import control policy is applied in our country and within this framework, product safety is given importance for products imported from abroad. Document and mark checks were already carried out on the products subject to inspections, but in addition, laboratory tests were made obligatory.

According to the statement made by the Ministry, 8 million products that were not found safe during these inspections were not allowed to import. Led bulbs constitute more than a quarter of these products. Considering that lighting has an important place in energy use, laboratory tests are extremely important in import inspections.

With the success of this practice, energy efficiency tests will be carried out in laboratories during the import of electric motors, televisions, coolers, air conditioners, ovens, dishwashers and washing machines.

In today's world where natural resources are increasingly depleted, energy saving has become an extremely priority issue. Electric motors consume nearly 70 percent of the electricity consumed in industry. Even a saving in electric motors has a very high effect. If energy efficiency were to be maximized, the amount of electricity savings to be achieved is equal to the energy produced by the Birecik Dam in six months or by the Keban Dam in 3 months. These numbers are not big enough to be underestimated. Electric motors alone consume nearly fifty times their value over their lifetime. So, if the energy efficiency of electric motors is reduced by a quarter, a serious savings will be achieved.

With the energy efficiency tests to be carried out in this way within the framework of product safety inspections in imports, which started in 2016, energy savings will be increased to quite high levels. The application of laboratory tests to be performed in obtaining these results is an important factor.

According to the statement made by the Ministry, the calendar for energy efficiency tests is as follows:

  • Laboratory tests of led bulbs will start on 15 March 2018
  • Laboratory tests of electric motors will start on 2 April 2018
  • Testing of air conditioners and refrigerants will begin on 2 May 2018
  • Tests of televisions, ovens, dishwashers and washing machines will begin in the second half of 2018.

What will the Energy Efficiency Audit and Administrative Sanctions Regulation Bring?

In addition to the inspection of electrical devices to be imported, there is also an Energy Efficiency Audit and Administrative Sanctions Regulation, the draft studies of which are carried out by the Ministry of Energy and Natural Resources. The said regulation aims to increase efficiency in the use of energy and energy resources and explains the obligations, responsibilities and audits that must be fulfilled by real and legal persons. It also regulates the principles for the detection of activities contrary to the legal regulations in force and the implementation of administrative sanctions.

Such controls and inspections will be carried out by engineers, experts and assistant experts working in official institutions of the state. However, the activities of private organizations and independent and impartial audit institutions operating in the field of energy efficiency are also reserved.

The principles that are expected to be complied with during the energy audits are as follows:

  • Impartiality should be exercised during the audit work, evaluation of the results and preparation of the audit report.
  • Any interference that affects honesty and impartiality should not be allowed.
  • The care and diligence required by the task should be shown in audit activities.
  • Both the aforementioned regulation principles and generally accepted audit principles should be complied with in the works.
  • If important points that will adversely affect energy efficiency services are determined during the inspections, this should be explained before the result of the study is expected.
  • Inspection works should not prevent the work in the places where the inspection is made.

The Importance of Inspection and Test Laboratories in Energy Efficiency

The basic principle of energy efficiency in independent and impartial test laboratories is to determine the energy needs of customers, to reduce energy costs to economic values ​​and to support enterprises in producing energy solutions in accordance with international standards.

The Ministry of Energy and Natural Resources is also taking the necessary steps to measure the energy performance of buildings and create energy identity certificates. In this context, energy efficiency tests are carried out especially on energy efficiency in buildings, energy efficiency in industry, energy efficiency of electrical household vehicles, energy efficiency in heating and cooling systems in homes and workplaces, energy efficiency in lighting and energy efficiency in transportation.

Our economy needs energy at an increasing rate every year. The need for energy is increasing, but most of the energy needs are met from imported sources. Therefore, it is necessary to give importance to energy saving and to turn to alternative energy sources, especially to benefit from renewable energy sources. The Ministry of Energy and Natural Resources makes the necessary regulations for the production of heavily used electrical devices in accordance with energy efficiency criteria. Test and inspection organizations also conduct energy efficiency tests of various electrical devices and detect products that fall below a certain energy efficiency class.

The main products tested are:

  • Household refrigerators
  • Non-linear household lamps
  • Fluorescent lamps without integrated ballasts and high intensity discharge lamps
  • Household washing machines
  • Environmentally friendly design requirements of water circulation pumps
  • Environmentally friendly design requirements of electric motors
  • Television energy label
  • Energy label of home air conditioners
  • Energy label of household ovens, stoves and aspirators
  • The energy label of vacuum cleaners
  • Energy label of household dishwashers
  • Energy label of household tumble dryers

Our organization also provides detailed energy efficiency testing services with a strong technological infrastructure and staff.