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.