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Zwick has developed a new instrumented drop weight impact tester which was launched at the recent testXpo – 16th International Forum for Materials Testing in Germany. It was configured for multi-axial impact tests and compression-after-impact tests on plastics and composite materials.

The HIT230F drop weight tester meets the requirements for multi-axial impact tests in accordance with ISO6603-2 and the corresponding ASTM D3763, and is equipped with a piezo force sensor with an extremely low noise characteristic. The sensor is located very close to the impact point which ensures that it is protected against virtually all mechanical vibrations. The innovative pneumatic specimen gripping system allows the insertion and testing of specimens in less than five seconds, and in many applications it is possible to avoid the installation of a temperature chamber. The testing area is easily accessible by the operator but still ensures that safety is uncompromised.

An optional spring pre-load is available for additional acceleration to increase the impact speed.

The drop weight impact tester can also be used to introduce damage to long fiber-reinforced composites for the compression-after-impact (CAI) test as described in Airbus and Boeing standards. Additional components are available for this purpose. The compression test for determining the influence of the damage on the strength is then performed on a static testing machine.