高低温下复合材料层压结构自由边缘分层与分层屈曲研究

Delamination is a main failure form of composite laminated tructures.Investigation on the elamination mechanism and strength is one important subject in composite fields. Delaminated buckling and growth belong to one of delaminated failure forms of laminated structures. Early, investigations on delaminated failures are limited in one dimension model of traverse delamination. After 1980 year, the study on two dimension delaminated buckling model are mainly elliptic and rectangular delaminations. So for, the investigations on lemniscates and triangular delaminations, and delaminated buckling on the surface of laminated structures under high and low temperatures environment have been few because of its complexity.The main contants and important results of investigation on the subject are, respectively, the growth mechanism, failure form and delaminated criterion of composite laminated structures under thermal and mechanical loads, the measuring and testing technology of laminated plates under high and low temperatures environment, utilizing autofrettage technology enhances the fatigue strength of composite reinforced pressure vessel with metal liners, energy absorbing mechanism of composite laminated structures and thermal shock effects of anisotropic structures. . The results carried out appear in important theory signification for against delaminated failure of composited laminated structures, and provide effective analysis and calculation method and theoretical base for the design on composite laminated structures in aerospace and spaceflight, etc.fields.

研究高低温、复杂受载条件下，复合材料层压结构自由边缘分层与二维分层屈曲的形成与扩展机理、判据及分层损伤引起层压结构宏观强度、刚度的变化；研究抑制自由边缘分层的技术及其在层板试验与工程中的应用，研究层板高温、低温试验的测试与试件制备技术。研究结果将为航空、航天等工程中复合材料结构的设计提供有效的分析计算方法和理论依据。