Abstract
In this study, the characterization of TiNi shape memory alloy coil springs is described. At first, the results of uniaxial tensile test for the TiNi wire and coil springs are described. By use of the kinetics model and the mixture theory of parallel type and series types, the stress distributions and load-displacement curves for TiNi coil springs are predicted analytically. The numerical calculations are performed by use of the material constants obtained by the previous tests. The both results, analytical and experimental results, are compared and discussed.
