Influence of inclusion size and strain rate on the interaction between cracking and the matrix–inclusion interface in composites

► Strain rate and inclusion size affect deflection/penetration behavior of crack perpendicular to circular interface. ► Critical strain rates decreasing with inclusion size exist for crack penetration, and crack deflection is shear dominated. ► Strain rate dependence of Second Phase Dynamic Strength...

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Bibliographic Details
Published in:Computers & structures 2011-12, Vol.89 (23), p.2211-2220
Main Authors: Liu, Lu-Guang, Ou, Zhuo-Cheng, Duan, Zhuo-Ping, Huang, Feng-Lei
Format: Article
Language:English
Subjects:
Computer simulation
Crack deflection
Crack penetration
Cracks
Dynamic loadings
Dynamics
Exact sciences and technology
Fracture mechanics
Fracture mechanics (crack, fatigue, damage...)
Fundamental areas of phenomenology (including applications)
Inclusions
Loads (forces)
Penetration
Physics
Solid mechanics
Stopping
Strain-rate
Structural and continuum mechanics
Vibration, mechanical wave, dynamic stability (aeroelasticity, vibration control...)
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Summary:► Strain rate and inclusion size affect deflection/penetration behavior of crack perpendicular to circular interface. ► Critical strain rates decreasing with inclusion size exist for crack penetration, and crack deflection is shear dominated. ► Strain rate dependence of Second Phase Dynamic Strength is independent of both inclusion size and interfacial strength. ► Strain rate effect on strength isn’t an intrinsic property of composites, due to dependence on external loading conditions. The critical deflection/penetration behaviour of a crack terminating perpendicular to a circular matrix–inclusion interface under dynamic tensile loadings is simulated numerically. It is found that higher strain-rate loading is necessary for a crack to penetrate through an inclusion with a smaller radius. Moreover, the minimum loading amplitude for penetration increases with the strain-rate, and this strain-rate dependence appears to be independent of the inclusion size and the interfacial strength. Additionally, these results imply that the strain-rate effect of dynamic strength can be induced by the quasi-static structural properties of composites, which is in agreement with the results of previous works.
ISSN:0045-7949
1879-2243
DOI:10.1016/j.compstruc.2011.08.016