Bending moment method for measuring internal stresses in heterogeneous materials, (Das Biegemomentenverfahren zum Messen von Eigenspannungen in heterogenen Werkstoffen)

A new method is described for measuring the distribution of longitudinal internal stresses over the cross- section of rectangular bars of heterogeneous materials. Machining of the test bar on one side causes bending which is eliminated by a balance for measuring bending moments, which can be used to calculate internal stresses without knowledge of the elastic constants, e. g. , in clad steels, cermets, and reinforced plastics.