Applications of DIC Technology in Impact Testing

Impact testing is a key experiment for evaluating the response of materials or structures under rapid loading, widely used in aerospace, automotive industry, protective equipment and other fields. In traditional impact tests, commonly used sensors such as strain gauges and accelerometers can usually measure only local stress and strain, whileDIC technology as a full-field, non-contact measurement method, can acquire full-field deformation data of specimens under impact loads in real time, providing more comprehensive stress-strain distribution maps.

In impact tests, DIC captures specimen surface images with high-frequency cameras and computes the displacement and strain of each point through image comparison analysis. Since load changes in impact tests are extremely rapid, DIC can capture the structural deformation process in very short time in real time, helping researchers accurately identify strain concentration areas and failure modes of materials under impact loads.

Haytham Hopkinson Impact Test Case

For example, in vehicle crash tests,DIC technology can monitor the local and overall deformation of the vehicle body in real time during impact, especially the elastic recovery and plastic deformation after collision. Compared with traditional sensors, DIC can provide more detailed data, such as body crack propagation and local stress concentration, providing strong support for automotive design and safety optimization.

In addition, DIC can also be used in high-energy impact tests to analyze the fracture process of brittle materials. For example, in impact tests on brittle materials such as ceramics and glass, DIC can capture the initiation, propagation and failure of microcracks, helping material engineers evaluate impact resistance and optimize material formulation and structural design.