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.