形状記憶合金コイルばれの変形特性 : 応力-ひずみ-温度関係に基づく解析

概要

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In the design of a shape memory alloy helical spring, a basic method of designing the spring based on the stress-strain-temperature relation of the material is an important problem to be solved. In the current study, deformation behavior of the shape memory alloy helical spring was analyzed based on stress-strain-temperature relation of the material. The relationship between load and deflection of the spring as well as behavior of transformed region were discussed. The main results are summarized as follows. (1) Relation between load and deflection of the spring. is represented by using a simple model of the stress-strain-temperature relation. (2) For a certain maximum deflection, recoverable force and recoverable strain energy increase with temperature. Dissipated strain energy takes a maximum value at a certain temperature. (3) The transformed region in the cross section of the wire expands into the center from the surface under the loading process, but contracts toward the surface under the unloading process. For a certain maximum deflection, the transformed region is small but the load is high as the temperature is high.
一般社団法人日本機械学会の論文
1990-01-25