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首页> 外文会议>Recent researches in mechanics >Micromechanical Experiments of Interlaminar Deformation and Damage in Angle-Ply Thermoplastic Composite Laminates
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Micromechanical Experiments of Interlaminar Deformation and Damage in Angle-Ply Thermoplastic Composite Laminates

机译：角层热塑性复合材料层间层间变形和损伤的微力学实验

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摘要

In this paper, a system of micromechanical experiments is established combining microscopic moire interferometry of high spatial resolution with optical microscope. Under uniaxial tensile loading (longitudinal strain from 0 to 14000με), the quantitative local-field of interlaminar displacements of the [±25]_(s4) AS4/PEEK laminates has been measured. The pictures of in-situ interlaminar damage initiation and growth process have been simultaneously collected by the experimental system continuously and real-time. The major characteristic of interlaminar damage of the angle-ply laminate [±25]_(s4) under tensile loading is that there are a large number of fiber end cracks near the interface regions of ±25 plies, in which shear strain is higher. Delaminations are caused in those interfaces due to fiber-matrix interface debondings at the tips of the fiber end cracks.
机译：本文建立了结合高空间分辨率显微莫尔干涉仪和光学显微镜的微机械实验系统。在单轴拉伸载荷（纵向应变从0到14000με）下，已经测量了[±25] _（s4）AS4 / PEEK层压板的层间位移的定量局部场。实验系统连续实时地收集原位层间损伤的发生和生长过程的图像。在拉伸载荷下，角膜层合物[±25] _（s4）的层间损伤的主要特征是在±25层的界面区域附近有大量的纤维端部裂纹，其中剪切应变较高。由于纤维-基体界面在纤维末端裂纹尖端处的剥离而在这些界面中引起分层。

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