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首页> 外文期刊>Composite Structures >Comparison of strain pre-extrapolation techniques for shape and strain sensing by iFEM of a composite plate subjected to compression buckling
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Comparison of strain pre-extrapolation techniques for shape and strain sensing by iFEM of a composite plate subjected to compression buckling

机译：压缩板的复合板IFEM应变预插构技术的比较

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摘要

The inverse Finite Element Method (iFEM) is a model-based technique for structural shape sensing based on a pattern of input strain data experimentally acquired on the structure. It is independent of the external load and material properties, making it a valid approach for composite materials monitoring. In this framework, the iFEM shape sensing capability is experimentally investigated on a carbon fiber reinforced polymer plate subjected to a compressive buckling condition. As logistic constraints impede strain sensor installation in all the desired locations, Smoothing Element Analysis (SEA) and polynomial fittings are used to pre-extrapolate the whole plate's strain field. Finally, after a sensitivity analysis on the input strain pre-extrapolation, the iFEM displacement reconstruction is validated with three lasers' independent measurements and direct FEM results, investigating the local and global shape sensing capability.
机译：逆有限元方法（IFEM）是基于基于结构形状感测的基于模型技术，其基于在结构上实验地获取的输入应变数据的模式。 它与外部负载和材料特性无关，使其成为复合材料监测的有效方法。 在该框架中，在经过压缩屈曲条件的碳纤维增强聚合物板上实验研究IFEM形状感测能力。 作为逻辑约束，在所有所需的位置妨碍应变传感器安装，使用平滑元件分析（海）和多项式配件用于预先推断整个板块的应变场。 最后，在对输入应变预推出的灵敏度分析之后，IFEM位移重建通过三个激光的独立测量和直接的FEM结果，研究了本地和全局形状传感能力。

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