Fundamental concepts and principles for robust structures, subjected to dynamic loading

The dynamic behavior assessment of material is very important before selecting the material for structural applications. In the modern world, Modified Hopkinson pressure bar apparatus is being widely used to investigate the dynamic behavior of engineering materials under compressive and tensile loading. Materials like ceramics, rocks, metals, concrete and soft material are being tested. The cost associated with the dynamic loading pressure bar apparatus is also low and can be easily built. For accurate measurement of material properties we need to understand the basic concepts associated with dynamic loading. With the advancement in computational capabilities, the dynamic load testing of materials is also performed in available commercial software's. In the current work, the basic concepts and components associated with dynamic compressive loading system are discussed and a test case studies are also selected for analyzing material specimen behavior during testing. For simulation of dynamic compressive loading ANSYS LS-DYNA software is used and the output of the simulation results is analyzed. The effects of changing the diameter of material specimen, and hollow bars on stress and strain values in the bar and setup are also discussed.