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The plastic collapse behavior and strength were investigated for an austenitic stainless steel pipe with two 90° through-wall notches perpendicular to the pipe axis direction. Double-notch specimens with various notch separation distances were coated with photo-plastic film. Arbitrary combined axial tensile and bending loads were applied to the specimens. Changes in the photoplastic fringe pattern...
A Herbert pendulum wasmodified to a lightweight pendulum with a cylindrical indenter by Habara in order to measure the hardness of viscoelastic materials such as plastics and rubbers. It is difficult to provide enough strain to evaluate the hardness of hard materials using the Herbert pendulum with a cylindrical indenter because the contact stress between the indenter and the specimen is smaller than...
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