The influence of surface ply fibre angle on the compressive strength of composite laminates containing delamination
The influence of surface ply fibre angle on the compressive strength of composite laminates containing delamination
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表层纤维角度对含分层复合材料层合板抗压强度的影响
DOI：
10.1017/s000192400000765x
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发表时间：
2012
期刊：
影响因子：
--
通讯作者：
N. Baker
中科院分区：
文献类型：
--
作者：
A. Rhead;R. Butler;W. Liu;N. Baker
本文采用单轴压缩试验、条模型和有限元分析相结合的方法，对人工分层的复合材料层合板进行了分析，研究了纤维角对复合材料层合板压缩强度的影响。0° < θ < 40°的亚层合板由于亚层合板屈曲驱动的脱层扩展而失效，并且提供较差的脱层容限。这是它们相对较高的轴向刚度、较低的亚层压屈曲应变、泊松比引起的压缩横向应变和产生意外的亚层压屈曲模态形状的拉伸-扭转耦合的结果。40° < θ < 60°的亚层合板对分层的容忍度最高;轴向和横向刚度最小，亚层合板屈曲的形成受到抑制，高的层合板屈曲应变减少了层合板和亚层合板屈曲模态之间的相互作用，拉伸-扭转耦合最小。60° < θ < 90°的亚层合板具有不同的分层公差。由于层合板和子层合板泊松比之间的不匹配引起的横向拉伸应变，通常可以防止子层合板屈曲，但可能发生在具有低泊松比的层合板中。
Abstract A combination of uniaxial compression tests and Strip Model and Finite Element analyses of laminates artificially delaminated to create circular (±θ) sublaminates is used to assess the influence of fibre angle on the compressive strength of composite laminates. Sublaminates with 0° < θ < 40° are found to fail by sublaminate-buckling-driven delamination propagation and provide poor tolerance of delamination. This is a consequence of their relatively high axial stiffnesses, low sublaminate buckling strains, Poisson’s ratio induced compressive transverse strains and extension-twist coupling which produces unexpected sublaminate buckling mode shapes. Sublaminates with 40° < θ < 60° are most tolerant to delamination; axial and transverse stiffnesses are minimal, formation of sublaminate buckles is resisted, high laminate buckling strains reduce interaction between laminate and sublaminate buckling mode shapes and extension-twist coupling is minimal. Sublaminates with 60° < θ < 90° are shown to produce varied tolerance of delamination. Sublaminate buckling is generally prevented owing to transverse tensile strains induced by mismatches between laminate and sublaminate Poisson’s ratios but may occur in laminates with low Poisson’s ratios.
单轴压缩损伤板屈曲驱动分层的半解析建模
影响因子：
1.2
作者：
Wadee M
通讯作者：
Wadee M