| Numéro |
J. Phys. Colloques
Volume 43, Numéro C4, Décembre 1982
ICOMAT-82International Conference on Martensitic Transformations |
|
|---|---|---|
| Page(s) | C4-825 - C4-830 | |
| DOI | https://doi.org/10.1051/jphyscol:19824135 | |
International Conference on Martensitic Transformations
J. Phys. Colloques 43 (1982) C4-825-C4-830
DOI: 10.1051/jphyscol:19824135
ON THE DESIGN OF PSEUDOELASTIC SPRINGS AND SPRING SYSTEMS
H. Verguts1, E. Aernoudt1 et W. Vermeersch21 Departement Metaalkunde, K.U. Leuven, Belgium
2 Proteus Association, Belgium
Abstract
The stress-strain curves of pseudoelastic alloys are non-linear and temperature dependent. So are the force-displacement characteristics of helical coil springs of these materials. For design purposes it is necessary to be able to calculate the spring properties as a function of spring dimensions. The nonlinearity of the characteristics and their temperature dependence are complicating factors. Force-displacement characteristics were determined on helical coil springs of a beta Cu-Zn-Al alloy. Both spring geometry and temperature were considered as parameters. It was found that it is possible to predict the characteristics of springs with different geometry once one set of characteristics is determined for one spring geometry at different temperatures. Use can be made of the pseudoelastic and shape-memory behaviour of the pseudoelastic springs by building them into a spring system. Different working principles of pseudoelastic spring systems are presented. One can design the spring system in such a way that a desired response, such as force, displacement, at given temperatures is realized.