考虑界面蠕变效应的层合壳结构的力学响应  

The mechanical responses of a laminated shell with consideration of interfacial creep effects

作　　者：雷庭杰 严蔚[1] 吕田碧 职君静 LEI Ting-jie;YAN Wei;LüTian-bi;ZHI Jun-jing(Faculty of Architectural,Civil Engineering and Environment,Ningbo University,Ningbo 315211,China)

机构地区：[1]宁波大学建筑工程与环境学院,浙江宁波315211

出　　处：《宁波大学学报（理工版）》2018年第2期63-67,共5页Journal of Ningbo University：Natural Science and Engineering Edition

基　　金：国家自然科学基金(51678310)

摘　　要：采用三维有限元方法分析了考虑界面蠕变效应的斜交铺设层合壳结构的力学响应,引入带阻尼弹簧单元模拟Kelvin-Voigt黏弹性界面.与其他学者的解析解结果作对比研究,验证了该有限元层合壳模型的有效性和准确性.进一步研究表明,由于层间界面的蠕变效应,层合壳结构的力学响应随时间发生显著变化;同时,随着时间推移,结构的承载力和整体刚度明显下降,因此在将来的层合结构设计过程中应充分考虑弱界面的影响.The three-dimensional finite element method is employed to investigate the mechanical responses of an angle-ply laminated shell by considering interfacial creep effects.A combined element including a dashpot and a spring is employed to simulate the Kelvin-Voigt viscoelastic interfacial relation.Comparison with existing analytical results by other researchers is conducted to validate the effectiveness and accuracy of the presented approach.The further study also shows that the mechanical behaviors of the laminated shell vary significantly according to the interfacial creep effects.In addition,the structural bearing capacity and the global stiffness decline evidently with time elapsing,which concludes that the imperfect interfaces should be considered carefully in the future laminate design.

关 键 词：有限元 层合壳 黏弹性界面 力学响应 

分 类 号：O343.2[理学—固体力学] TU312[理学—力学]