Method for Designing Springs Using Materials with Shape Memory as the Actuators of Power Units

Resumo

The physical and mechanical behavior of titanium nickelide coil springs of different stiffness is experimentally investigated during thermal cycling through martensitic transformation ranges under a constant tensile force. The springs exhibit a reversible length change by reciprocating movements. In terms of classical mechanics, a method for the design calculation of springs with shape memory as actuators is proposed for a given stiffness range.