[14]纤维增强聚合物层合板二维分层的新实验设计

Proceedings of The Eighteenth International Conference of Experimental Mechanics Pub Date : 2018-05-30 DOI:10.3390/ICEM18-05283

Aida Cameselle-Molares, A. P. Vassilopoulos, T. Keller

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引用次数: 0

摘要

实验研究了准静态面外开口载荷作用下复合材料层合板的二维(2D)分层行为。提出了一种新型的含圆形预埋裂缝纤维增强聚合物(FRP)层合板的设计与实验装置。在扩展过程中，由于裂纹前缘长度的增加，载荷-位移曲线呈递增趋势。在整个加载过程中，硬化和软化机制被激活。层合板脱层部分的拉伸是层合板的主要加筋机制。一旦裂纹开始扩展，由于裂纹扩展而产生相应的软化，同时发生二次硬化机制，即纤维桥接。这些与刚度相关的机制反映在柔度中。

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144 Novel experimental design for two-dimensional delamination in fiber-reinforced polymer laminates

The two-dimensional (2D) delamination behavior of composite laminates under quasi-static out-of-plane opening loads has been experimentally investigated. A novel design and experimental set-up for fiber-reinforced polymer (FRP) laminated plates with a circular embedded pre-crack was developed. Increasing load-displacement curves were obtained due to the increasing crack front length during propagation. Throughout the loading process, stiffening and softening mechanisms were activated. The stretching of delaminated part of the laminates constituted the main stiffening mechanism. Once the crack started growing, a corresponding softening due to crack propagation occurred together with a secondary stiffening mechanism, fiber-bridging. These stiffness-related mechanisms were reflected in the compliance.

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Proceedings of The Eighteenth International Conference of Experimental Mechanics

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