Understanding the effect of the material parameters variability on the mechanical response of laminated composites is of great importance for many engineering problems. Not only an accurate sensitivity analysis enables to estimate how much each parameter under consideration affects the response, but the linearization of the output provides also the possibility to, for example, use gradient-based optimization tools and to propagate in an inexpensive way the material uncertainties. In this paper, a material parameter sensitivity study is carried out in the context of continuum damage mechanics applied to predict intralaminar damage in laminated composites. The sensitivity w.r.t. the input material variables is estimated in a relatively inexpensive way from a single run of the Finite Element (FE) model. The results obtained provide a good understanding of the influence of the material parameters throughout the simulation.

中文翻译：

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通过直接区分分析层压复合材料层内损伤的材料参数敏感性分析


了解材料参数变化对层压复合材料机械响应的影响对于许多工程问题非常重要。准确的灵敏度分析不仅可以估计所考虑的每个参数对响应的影响程度，而且输出的线性化还提供了可能性，例如，使用基于梯度的优化工具，并以廉价的方式传播材料的不确定性。在本文中，在连续损伤力学的背景下进行了材料参数敏感性研究，用于预测层压复合材料中的层内损伤。对输入材料变量的灵敏度是通过有限元 （FE） 模型的单次运行以相对便宜的方式估计的。获得的结果有助于很好地理解材料参数在整个仿真过程中的影响。