What Are Stress-Strain Curves?
Stress-strain curves describe the mechanical response of a material under applied load. In Shape memory alloys (SMAs), these curves provide critical insight into material behavior during actuation and deformation.
Hysteresis and Transformation Plateaus
SMA stress-strain curves reveal distinct regions, including elastic deformation, transformation plateaus associated with martensitic phase transformation, and hysteresis between loading and unloading paths. At higher stress levels, plastic deformation regions may appear, indicating permanent damage.
H2: Interpreting Stress-Strain Curves for Actuation
Understanding stress-strain curves is essential for determining usable strain limits, transformation stress, and fatigue behavior. They are widely used in SMA characterisation, actuator design, and performance optimization across aerospace, robotics, and precision engineering applications.