Vibration and shock testingVibration and shock can damage structures, resulting in mechanical problems or causing electrical functions to fail. It has been found that very many problems could be avoided if consideration is given at the development stage to the conditions to which the product will be exposed. Using our environmental test facilities, RISE can determine how well a design withstands mechanical forces from its surroundings. We are accredited for a large number of standards (MIL, IEC, ISO etc.). The potential life of a design can be simulated using accelerated testing, to see whether it operates as intended and with no risk of danger while in use. Short but severe tests, with stress levels being progressively increased in steps, can be used to identify products’ performance limits. We can also carry out vibration and impact measurements in the field and analyse them. We can then use the analysis results to estimate the theoretical fatigue life of a construction or devise 'tailor-made' accelerated life tests.
Multi-axis vibration testing
The ability to vibrate an item under test in more than one direction at the same time is of interest for areas such as automotive and transport applications, and for earthquake testing. We can vibrate large objects of up to 1,5 tonne in two axes simultaneously. Typical applications include vibration fatigue testing of vehicle cabs and seats. Earthquake testing is common in export industries and for Swedish nuclear power stations, where items such as electrical equipment, electronic equipment cubicles containing control and instrumentation equipment and telephone equipment are tested.
Verification of earthquake resistance is an important working area for RISE, supported by long experience and extensive knowledge. RISE performs earthquake tests in accordance with most international standards.
Single-axis vibration testing
We perform vibration tests for vehicle transported goods. This ranges from large heavy items that are tested at low and moderate frequencies, to smaller and lighter items that are tested at high frequencies: typically, a range from 2 to 2000 Hz.
Shock testing is used, for example, to verify whether a product can survive a crash in a vehicle, transport conditions or normal use, so that even if the item is dropped to the ground it will still work correctly. Shock testing is performed by shakers, shock testers or crash sleds, depending on the acceleration and pulse duration that are required.
Combined mechanical and climatic testing
When products incorporate structural plastic elements, it is very important to perform combined testing, as the mechanical properties of plastics change with varying temperatures and/or moisture conditions. RISE’s test facilities are able to simulate mechanical stress (vibration, shock) and simultaneous high/low temperatures, with controlled relative humidity up to 95 %.