The interface debond analysis for sandwich beam with viscoelastic core and steel faceplates
a interface debond phenomenon appeared between viscoelastic core and steel faceplates when unloading in large deflection 3-point bending experiments for sandwich beam.From analysis of loading and unloading process,a reason of debond is found that it is the large deflection cause the debonding of interface firstly under the effect of shear stress.After unloading,local plastic rotation in the middle of beam lead to residual moment between upper faceplate and bottom faceplate.And the shear stress effect at interfaces is also transformed to tension stress.By double cantilever beam and single cantilever beam experimental results,a calculation method of critical deformation are given to calculate the critical strain energy release rate.then the critical crack length values of different types of the specimen are obtained.
Sandwich Viscoelastic Core Debond Interfacial crack
Zou GuangPing Xue QiChao Chang ZhongLiang
Department of Aerospace and Civil Engineering,Harbin Engineering University,Harbin,150001,China
国际会议
北京
英文
1-9
2013-06-16（万方平台首次上网日期，不代表论文的发表时间）