Mechanical stress component measurement on surface of dynamically loaded object - applying anisotropic liquid crystal polymer or glass fibre film to surface of object and measuring temp. change, repeating with film rotated and finally measuring temp. without film or with film rotated w.r.t. previous locations.

摘要

An anisotropic measurement film is attached to a measurement point on the object. The temp. of the film is measured with the object under stress and evaluated according to a relationship between the temp. change, the average object temp., its density, specific heat, the extension, the change in the extension, the stiffness tensor and the thermal expansion coefficient. The foil is rotated and the measurement repeated. The temp. of the object is then measured without the foil under load or the foil is rotated again and a third measurement performed. USE/ADVANTAGE - Eg for industrial and transport purposes, aerospace, military, vehicle and ship construction, testing and monitoring of bridges and buildings, and mfr. of medical implants and prostheses, flaw detection and early damage warning. Accurate detection and measurement of individual stress components.