Biaxial Testing Using Cruciform Specimens
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Uniaxial test data for use in design of components and structures operating at high temperatures has been the sole means of predicting deformation and rupture. The majority of components and structures operating at high temperatures are subjected to biaxial or triaxial stress. Formulation of equations which enable calculation of deformations of such components to be made with more confidence has been the result of the investigations in the main by Johnson. Henderson and Khan (1962). From extensive work, primarily on tubular specimens, they confirmed , that creep under any arbitrary stress system can be derived from knowledge of the uniaacial test carried out at the same effective stress.
KeywordsPrincipal Stress Maximum Principal Stress Biaxial Tension Creep Rupture Multiaxial Stress State
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