求解层间界面反平面剪切破坏的剪切梁模型(Ⅱ)——失稳特性

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基金项目: 欧盟资助课题(INCO-Copernicus;ERBIC15CT970706);东北大学青年科学基金资助课题(856049)

Shear Beam Model for Interface Failure Under Antiplane Shear(Ⅱ)——Instability

1.
Department of Mechanics, Northeastern University, Shenyang 110006, P R China;
2.
Institute of Fundamental Technological Research, Polish Academy of Sciences, Warsaw, Poland

摘要: 在研究(Ⅰ)的基础上,研究了剪切梁模型在裂纹萌生和失稳扩展阶段的行为特性,1)给出了软化失稳(snap-through)和回折失稳(snap-back)两种失稳行为发生的条件.2)对剪切梁在反平面剪切载荷及侧压力共同作用下的力学行为作了解析分析计算,给出了结构的位移—载荷全过程曲线.3)讨论了失稳过程中的能量释放问题,并给出了回折失稳过程中结构对外界的能量释放的计算式.
- 界面层 /
- 反平面剪切 /
- 破坏 /
- 剪切梁 /
- 失稳 /
- 软化失稳 /
- 回折失稳 /
- 损伤
Abstract: Based on the(Ⅱ) of the present work,the behavior of shear beam model at crack initiation stage and at instable propagation stage was studied.The prime results include:1) discriminant equation which clarifies the mode of instability,snap-back or snap-through,was established; 2) analytical solution was given out for the double shear beam and the load-displacement diagram for monotonic loading was presented for a full process; and 3) the problem of the energy release induced by instability was discussed.
- interface layer /
- antiplane shear /
- failure /
- shear beam model /
- instability /
- snap-through /
- snap-back /
- damage

[1]	Garg A C.Delemination a damage mode in composite structures[J].Engng Fract Mech,1988,29(2):557-584.
[2]	Hutchinson J W,Suo Z.Mixed mode cracking of layered materials[A].In:W Hutchinson,T Y Wu,Eds.Adv Appl Mech[C].29.New York:Academic Press,1991,63-191.
[3]	Yang B,Ravi-Chandar K.Anti-plane shear crack growth under quasi-static loading in a damaging material[J].Int J Solids Struct,1998,35(12):3695-3715.

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