Deformation measuring appts. for new material subject to dynamic heating - uses infrared heating of material and laser measurement of deformation when material is centrally loaded between two supports

摘要

The deformation of the material is determined from a sample of the material, which is compressed between upper and lower jaws (4,6). The lower jaw is displaced by a hydraulic actuator. The lower jaw has a U-shaped profile which the sample spans and the upper jaw has a single projection that is positioned in the centre of the U. The sample is exposed to rapid heating from a bank of infrared lamps, and the deformation measured by the deviation of a laser beam that is projected onto one side of the sample. USE/ADVANTAGE Provides rapid increase in temperature to test novel materials, particularly those intended for aerospace or other demanding applications.