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| An interfacial element method based on the effect of interfacial phase |
| Received:August 10, 2018 Revised:November 26, 2018 |
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| DOI：10.7511/jslx20180810001 |
| KeyWord:bonding material interface model interfacial element Finite Element Method numerical simulation |
| Author | Institution |
| 夏日 |
上海交通大学 船舶海洋与建筑工程学院, 上海 |
| 许金泉 |
上海交通大学 船舶海洋与建筑工程学院, 上海 |
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| Abstract: |
| An interface is simplified from a complex interfacial phase,and interface failure is actually the failure of an interphase.For convenience of numerical analysis,classic model and cohesive zone model take a thin interphase as a zero-thickness interface.As a result,only surface force at an interphase is considered,but inner stress within an interphase is neglected.This would lead to an inherent absence of influence of inner stress in an interface failure criterion,which is imprecise from the view point of interphase material failure.By assuming interfacial phase as an equivalent elastic continuum,a new interfacial element which can give an equivalent description of interface mechanical properties is derived from interface constitutive relation in this paper,and the relevant parameters are convenient to quantize.Numerical simulation is performed with commercial FEM software ABAQUS and user subroutine UEL,which agrees well with numerical results of direct physical model.By several further analyses of structures with different interfacial phase thicknesses,applicability of this method is discussed. |
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