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NUMERICAL SIMULATION OF PROGRESSIVE DAMAGE AND ULTIMATE FAILURE DURING TENSILE TESTING OF COMPOSITE PANELS

机译:复合板拉伸试验过程中渐进损伤和最终故障的数值模拟

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This paper focuses on the phenomenon of local material damage and progressive failure of fibre-reinforced composite materials induced by load exceeding the specimen's failure-free load-carrying capacity. It follows and extends the work published in [4, 5 and 6] where a FEA based numerical model is presented, allowing for the prediction and subsequent treatment, yet simple, of progressive material failure for the case of quasi-static loading. This treatment has been improved in this work, so the approach of applying material degradation now corresponds to the predicted failure type, which is done using the Puck's fibre and inter-fibre criterion for local failure [3]. This type of analysis is crucial when optimizing composite structures in cases when it is important to maximize the utility value at the lowest possible cost/weight, mainly in automotive, aerospace and naval industry.
机译:本文重点介绍了局部物质损伤的现象和纤维增强复合材料的累计失效超过了载荷诱导的载荷,超过标本的无故障载荷容量。它遵循并扩展[4,5和6]中发布的工作,其中提出了一种基于FEA的数值模型,允许预测和随后的治疗,但是简单的渐进材料的逐步载荷的逐步失败。这项工作已经提高了这种处理,因此施加材料劣化的方法现在对应于预测的故障类型,这是使用PACK的光纤和局部故障的纤维间标准进行的[3]。这种类型的分析在优化复合结构时至关重要,以便以最低可能的成本/重量最大限度地提高效用价值,主要是汽车,航空航天和海军行业。

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