A method to determine the shear and compressive stress–strain curves from torsion and bending tests of thin wires

Some materials are provided as wire or other slender geometries and are commonly used as mechanical parts, especially in medical applications. If slender geometries are well adapted to quasistatic tensile tests, such geometries cannot be properly tested under shear and compressive loads. The shear and compressive stress-strain curves nevertheless remain of major interest to engineers and designers. This paper proves and illustrates that material shear and compressive stress-strain curves can efficiently be extracted from torsion and bending tests on thin wires, even in noisy situations. The method is first presented to analyze torsion tests. This method is then developed and adapted to extract the material compressive stress-strain curve from both pure bending and uniaxial tensile tests.