Comparison of strain pre-extrapolation techniques for shape and strain sensing by iFEM of a composite plate subjected to compression buckling

被引：39

作者：

Oboe, Daniele ^{[1
]}

Colombo, Luca ^{[1
]}

Sbarufatti, Claudio ^{[1
]}

Giglio, Marco ^{[1
]}

机构：

[1] Politecn Milan, Mech Engn Dept, Via La Masa 1, I-20156 Milan, Italy

来源：

COMPOSITE STRUCTURES | 2021年 / 262卷

关键词：

inverse Finite Element Method; Smoothing Element Analysis; Shape sensing; Strain extrapolation; Buckling; Composite structure;

D O I：

10.1016/j.compstruct.2021.113587

中图分类号：

O3 [力学];

学科分类号：

08 ; 0801 ;

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.

引用

页数：17