长期荷载作用下含粘弹性界面层合板的力学行为  

Mechanical behavior of a laminated plate with viscoelastic interfaces under long-term loading

作　　者：职君静 严蔚[1] 雷庭杰 郑骥[1] 

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）》2017年第1期77-81,共5页Journal of Ningbo University：Natural Science and Engineering Edition

基　　金：浙江省自然科学基金(LY12E08005)

摘　　要：采用状态空间法研究了含弱界面斜交铺设复合材料层合板的力学行为.选用Kelvin-Voigt粘弹性本构关系模拟结构的界面特性.为了考察长期荷载作用下层合结构依赖于时间变量的力学响应,通过递推关系在时间域内构建了一组关于层间滑移量的状态微分方程,从而得到了结构中各物理量在任意时刻的弹性力学精确解.通过与其他学者研究结果的比较,验证了本研究方法的准确性和有效性.研究结果表明,层间弱粘结会严重影响复合材料层合结构的力学特性,降低结构的承载力和整体刚度.The mechanical behavior of an angle-ply laminated plate with imperfect interfaces is investigated based on state space technique. The Kelvin-Voigt viscoelastic law is adopted to depict the interfacial properties. In order to study the time-dependent responses of the laminates under long-term loading, a set of state differential equations related to interracial sliding are established through the recurrence relations in the time domain. The exact elasticity solutions can then be obtained at any time. Comparison study with existing numerical results by other researchers is conducted to validate the present analysis. Further study shows that the interfacial imperfection influences the mechanical properties of the composite laminated structures evidently, and reduces the bearing capacity and the global stiffness of the laminate.

关 键 词：粘弹性界面 斜交铺设 层合板 状态方程 精确解 

分 类 号：O343.2[理学—固体力学] TU312[理学—力学]