Research on Relationship between Crack Propagation Speed of TC4 Alloy  and Loading Speed under Mode II Dynamic Loading

doi:10.3969/j.issn.1000-1093.2016.12.020

Abstract

Abstract: In order to ascertain the crack initiation time of TC4 in Mode II crack experiment, the energy absorption in plastic zone and the crack propagation speed are calculated. Split Hopkinson pressure bar (SHPB) is used to experiment upon Mode II crack propagation of TC4. High-speed digital speckle correlation method (HS-DSCM) is used to get displacement-time curve at a observation point, the Mode II crack initiation time of TC4 is determined, and the propagation speed of Mode II crack is calculated. A finite element model is established using ABAQUS/Explicit. The simulated results is compared to the experimental results. The propagation forms of crack at different impact velocities under loading condition are researched. Mode II crack propagation speeds at different loading speeds are calculated. Relation between loading speed and Mode II crack propagation speed is obtained.

Key words: metallic material, Mode II crack, crack propagation speed, split Hopkinson pressure bar, HS-DSCM

CLC Number:

MIAO Run， WANG Wei-li， SONG Yang. Research on Relationship between Crack Propagation Speed of TC4 Alloy and Loading Speed under Mode II Dynamic Loading[J]. Acta Armamentarii, 2016, 37(12): 2331-2339.

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Research on Relationship between Crack Propagation Speed of TC4 Alloy and Loading Speed under Mode II Dynamic Loading

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