Extension of the test piece in the time of high temperature and deformation measuring method

摘要

PURPOSE: To make it possible to determine simply the elongation and strain of a test piece at a high temperature by computation. ;CONSTITUTION: The elongation 1₁ of a test piece 1 in a length l at the time when a load F is applied at a room temperature T is determined beforehand and the strain δ₁ of the test piece 1 in the length L is determined by δ₁=1₁/L. The test piece 1 in an arbitrary length H is heated by a heating device 2. The elongation 1₂ of the test piece 1 in the length L at the time when the load F is applied at a high temperature T' is determined, and when the elongation of the test piece 1 in the length H is assumed to be 1₃, the train δ₂ of the test piece 1 in a length L-H at the high temperature T' is δ₂=(1₂-1₃)/(L-H). Since δ₁=δ₂, 1₁/L=(1₂-1₃)/(L-H) is established and 1₃ can be determined by 1₃=1₂-(1-H/L)1₁. The strain δ₃ of the test piece 1 in the length H at the time when the load F is applied at the high temperature T' can be determined by δ₃=1₃/H.;COPYRIGHT: (C)1993,JPO&Japio