南京航空航天大学学报2018，Vol.50Issue(1)：36-44,9.DOI:10.16356/j.1005-2615.2018.01.006
张力场对复合材料层板组合梁连接强度的影响
Effect of Tension Field on Joint Strength of CFRP Beam
摘要
Abstract
Based on the analysis of boundary force of the pure-shear square plate in the post-buckling stage,the"I-shaped" composite beam test pieces considering the influence of the stiffness of skin sup-porting are designed to inspect the effect of post-buckling tension field on joint strength of composite beam by diagonal tensile test,and the finite element model based on cohesive zone model is used to sim-ulate the experiment and study the interface failure process and mechanism.The results show that the delamination field generated in the post-buckling stage of the web significantly increases the delamina-tion load at the interface,w hich leads to I/II complex stress state and accelerates the interface failure. The shearing test which considering the skin supported stiffness makes the skin form normal deforma-tion after instability in the web,to some extent weakens the increase of the interface delamination load, so that the failure load of the beam slightly increases.The final failure mode is the failure of the web fi-ber compression and I/II complex fracture of the interface.The cohesive zone model can well simulate the fracture of the interface of the composite.And the simulation is basically consistent with the experi-ment.关键词
复合材料/后屈曲/张力场/连接强度/黏聚区模型Key words
composite/post-buckling/tension field/joint strength/cohesive zone model分类
通用工业技术引用本文复制引用
陈智,曾建江,童明波..张力场对复合材料层板组合梁连接强度的影响[J].南京航空航天大学学报,2018,50(1):36-44,9.基金项目
江苏高校优势学科建设工程(PAPD)资助项目. （PAPD）
