Thermomechanical cyclic behavior modeling of Cu-Al-Be SMA materials and structures

详细信息	查看全文 | 推荐本文 |

• 作者：Luc Saint-Sulpice^a ; ^b ; ^c ; Shabnam Arbab-Chirani^a ; ^b ; ^c ; ^{shabnam.arbab@enib.fr} ; ^{arbab@enib.fr} ; Sylvain Calloch^a ; ^c
• 关键词：Shape memory alloys ; Cyclic test ; Macroscopic modeling ; Thermomechanical cyclic loadings ; Cu-Al-Be ; Jammed martensite ; Numerical integration ; Finite element analysis ; SMA actuators
• 刊名：International Journal of Solids and Structures
• 出版年：2012
• 期刊代码：93_00207683
• 类别：et
• 出版时间：1 May, 2012
• 卷：49
• 期：9
• 页码：1088-1102
• 文件大小：2062 K

摘要

This paper concerns the behavior of Cu-Al-Be polycrystalline shape memory alloys under cyclic thermomechanical loadings. Sometimes, as shown by many experimental observations, a permanent inelastic strain occurs and increases with the number of cycles. A series of cyclic thermomechanical tests has been carried out and the origin of the residual strain has been identified as residual martensite. These observations have been used to develop a 3D macroscopic model for the superelasticity and stress assisted memory effect of SMAs able to describe the evolution of permanent inelastic strain during cycles. The model has been implemented in a finite elements code and used to simulate the behavior of antagonistic actuators based on SMA springs under cyclic thermomechanical loading with a residual displacement appearance.