Experimental and Discrete Dislocation Dynamics Approach to Initiation of Cleavage Fracture under Short Pulse Loads

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概要

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• Mode I crack initiation properties under stress intensity pulses with durations of 25, 50 and 100 µs are investigated by experiment and discrete dislocation dynamics. The cleavage fracture initiation is examined under the consideration of the pile-up of dislocations against an obstacle ahead of the crack tip and the coalescence of piled-up dislocations. In the experiment, under very short pulse loads with the duration of less than 50 µs, the dynamic fracture toughness, <I>K<SUB>Id</SUB></I> remarkably increases and the crack tip opening displacement is closely correlated with <I>K<SUB>Id</SUB></I>. The numerical results are compared with the experimental ones in reasonable agreement.

• 一般社団法人 日本機械学会の論文

著者

• Homma Hiroomi

  International Cooperation Center for Engineering Education Development, Toyohashi University of Technology

関連論文

• Experimental and Discrete Dislocation Dynamics Approach to Initiation of Cleavage Fracture under Short Pulse Loads

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