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Microstructural analysis in asymmetric and un-balanced composite cylinders damaged by internal pressure

机译:内压破坏非对称不平衡复合材料气瓶的微观结构分析

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摘要

Damages in matrix and in fibre has been studied in asymmetric and un-balanced composite cylinders that were loaded to failure in mode 3 (unrestrained-end) internal pressure, developing an uniaxial state of stress, specifically hoop stress. The samples tested, in a total of five cylinders, were collapsed by internal pressure of 15 MPa. Optical and scanning electron micrography of fractured surfaces of the cylinders are presented and they show that the failures occurred by matrix failures, as debonding, transversal cracks and delamination and fibre failure, as transversal and longitudinal failures. The fracture types and modes were also determined.
机译:在不对称且不平衡的复合材料圆柱体中,研究了基体和纤维中的损伤,这些圆柱体在模式3(无约束端)内部压力下加载至破坏,从而形成了单轴应力状态,特别是环向应力。通过15 MPa的内压将总共五个气瓶中的测试样品压扁。给出了圆柱体断裂表面的光学和扫描电子显微照片,它们显示了由基体破坏(如脱胶,横向裂纹,分层和纤维破坏,如横向和纵向破坏)引起的破坏。还确定了裂缝的类型和方式。

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