torsjonsmodul

Torsjonsmodul, also known as the shear modulus or modulus of rigidity, is a fundamental material property that describes its resistance to shearing deformation. It quantifies the stiffness of a solid material when subjected to a twisting or torsional force. Mathematically, it is defined as the ratio of shear stress to shear strain within the elastic limit of the material. Shear stress is the force applied parallel to a surface, divided by the area of that surface, while shear strain is the resulting angular deformation.

A high torsjonsmodul indicates that a material is very stiff and requires a large amount of torque to produce a significant twist. Conversely, a low torsjonsmodul signifies a more flexible material that deforms easily under torsional loads. This property is crucial in engineering design, particularly for components like shafts, axles, and springs that experience torsional stresses. It influences the selection of materials for applications where resistance to twisting is paramount.

The torsjonsmodul is typically denoted by the symbol G and is measured in units of pressure, such as Pascals (Pa) or pounds per square inch (psi). It is an intrinsic property of a material and can be determined through experimental testing, such as torsion tests. Different materials possess significantly different torsjonsmoduler; for instance, metals generally have higher torsjonsmoduler than polymers.