The influence of inertial effects on the fracture of rapidly loaded compact tension specimens Part A: Loading and Fracture Initiation

摘要

Compact tension specimens were loaded at 1 and 7m/s with two different accelerations imposed. Experimentalphotoelastic patterns recorded by a high speed camera werecompared with those simulated by transient dynamic elasticFinite Element (F.E.) analysis. The positive results of thiscomparison validated the F.E. analysis, and gave credit to acomparison of the experimental results as well.It is demonstrated that when the initial acceleration of thespecimen is reduced, using a damper in the loading device, staticanalysis can be applied for both testing speeds used. In highaccelerations tests (without use of a damper), a transient dynamicstress state in the specimens is found, and therefore a dynamicanalysis should be used. Furthermore, in high acceleration tests atransient mixed mode of loading at the crack tip occurs.