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International Journal of Automotive Technology 2005;6(3): 229-234. |
| STUDY ON DYNAMIC BEHAVIOUR IN 3PB DUCTILE STEEL SPECIMEN APPLIED BY THE IMPACT LOAD |
| M. S. HAN1, J. U. CHO2, A. BERGMARK3 |
1Keimyung University
2Kongju National University
3Lund Institute of Technology |
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| ABSTRACT |
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The dynamic crack growth in ductile steel is investigated by means of the impact loaded 3 point bending (3PB) specimens. Results from experiments and numerical simulations are compared to each other. A modified 3PB specimen designed with the reduced width at its ends has been developed in order to avoid the initial compressive loading of the crack tip and also to avoid the uncertain boundary conditions at the impact heads. Numerical simulations of the experiments are made by using a finite element method (FEM) code, ABAQUS. The high speed photography is used to obtain the crack growth and the data of the crack tip opening displacement (CTOD). The direct measurements of the relative rotations of two specimen halves are made by using the Moire interference pattern. |
| Key Words:
Dynamic fracture, Moire interference pattern, Crack tip opening displacement, Visco-plastic properties |
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