Analytical model for predicting internal stress and deformation of shape memory alloy composite

Go Murasawa

doi:10.1117/12.599495

16 May 2005 Analytical model for predicting internal stress and deformation of shape memory alloy composite

Go Murasawa

Proceedings Volume 5761, Smart Structures and Materials 2005: Active Materials: Behavior and Mechanics; (2005) https://doi.org/10.1117/12.599495
Event: SPIE Smart Structures and Materials + Nondestructive Evaluation and Health Monitoring, 2005, San Diego, California, United States

Abstract

Composites containing Shape Memory Alloy (SMA) fiber and polymer (or metal) matrix are expected as smart materials and structural materials. For example, Shape Memory Alloy Composite (SMAC) exhibits creating of compressive residual stress (Creating of internal stress) in matrix and deformation of composite under thermo-loading. In the present study, firstly, the experimental model of SMAC (NiTi/Epoxy) were fabricated, and internal stress, deformation and temperature distribution of SMAC were measured under thermo-loading by using photoelasticity, digital image corelation and infrared radiation thermometry. As a result, some assumptions were obtained to construct analytical model of SMAC. Secondaly, the analytical model considering distribution of stress and strain in SMAC was constructed based on shear lag model. Closed solutions, such as shear stress in matrix and so on, were obtained from this analytical model. Then, some analyses were conducted for predicting internal stress and deformation of SMAC during thermo-mechanical loadings by using present closed solution.

Citation Download Citation

Go Murasawa "Analytical model for predicting internal stress and deformation of shape memory alloy composite", Proc. SPIE 5761, Smart Structures and Materials 2005: Active Materials: Behavior and Mechanics, (16 May 2005); https://doi.org/10.1117/12.599495

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