许多产品和组件在其正常使用过程中会承受扭转力。 With torsion testing, designers are able to understand real-life service conditions, improve product quality, validate design, and also verify actual production process. Products such as biomedical stents, implantable orthopedic devices, fasteners, and automotive steering/suspension components are examples of products that are subjected to torsional stresses in their typical service environment.
The types of torsion testing utilized vary depending on the information desired from the material or component. Examples include biomedical type torsional testing for bone, bone screws and plate assemblies. Whether it is for characterizing a torsion insertion test for bone screws, or performing basic failure tests, proof tests, or manufacturing process validation, some type of torsional testing method can be designed and performed to meet the needs of each application.
Torsion tests are typically performed to determine the torsional properties of a material or component. Analogous to the properties determined during a tensile/compression test, the “torque versus angle” diagram, for example, is similar to a “stress versus strain” curve.确定的特性包括：
- 脆性断裂（垂直于删除/广泛拉伸应力，45 度）
轴向 – 扭力：同时施加轴向（拉伸或压缩）负载和转矩。