METHOD OF TESTING MATERIALS FOR CRACK RESISTANCE UNDER CYCLICALLY LOADING

摘要

the invention u043au0430u0441u0430u0435u0442u0441u00a0 u0438u0441u0441u043bu0435u0434u043eu0432u0430u043du0438u00a0 processes u0443u0441u0442u0430u043bu043eu0441u0442u043du043eu0433u043e u0440u0430u0437u0440u0443u0448u0435u043du0438u00a0 materials. the purpose of u0438u0437u043eu0431u0440u0435u0442u0435u043du0438u00a0 - improved accuracy and informativeness tests on circular u0442u0440u0435u0449u0438u043du043eu0441u0442u043eu0439u043au043eu0441u0442u044c. u0443u043au0430u0437u0430u043du043du0430u00a0 goal u0434u043eu0441u0442u0438u0433u0430u0435u0442u0441u00a0.the method of test samples of materials in u0442u0440u0435u0449u0438u043du043eu0441u0442u043eu0439u0438u0437u043eu0431u0440u0435u0442u0435u043du0438u0435 u043eu0442u043du043eu0441u0438u0442u0441u00a0 to u0438u0441u0441u043bu0435u0434u043eu0432u0430u043du0438u00a0u043c processes u0443u0441u0442u0430u043bu043eu0441u0442u043du043eu0433u043e u0440u0430u0437u0440u0443u0448u0435u043du0438u00a0 materials, namely, by the way am experimental evaluation u0441u043eu043fu0440u043eu0442u0438u0432u043bu0435u043du0438u00a0 materials created and spread in these cracks under the action of periodic u0438u0437u043cu0435u043du00a0u044eu0449u0438u0445u0441u00a0 largest (u0446u0438u043au043bu0438u0447 u0435u0441u043au0438u0445) u043du0430u043fu0440u00a0u0436u0435u043du0438u0439, based on the different plane.the bone in u0446u0438u043au043bu0438u0447u0435u0441u043au043eu043c u043du0430u0433u0440u0443u0436u0435u043du0438u0438, u0437u0430u043au043bu044eu0447u0430u044eu0449u0435u043cu0441u00a0 in sample material u0432u044bu043fu043eu043bu043du00a0u044eu0442 incision, continuously make me over his scheme u0442u0440u0435u0445u0442u043eu0447u0435u0447u043du043eu0433u043e bending strength, r u0430u0441u043fu043eu043bu043eu0436u0435u043du043du043eu0439 in the middle between the pillars, and the number of cycles to u043eu043fu0440u0435u0434u0435u043bu00a0u044eu0442 u0437u0430u0440u043eu0436u0434u0435u043du0438u00a0 cracks in the top of the incision, and the speed of u0440u0430u0441u043fu0440u043eu0441u0442u0440u0430u043du0435u043du0438u00a0 cracks, taking into account the which u0441u0443u0434u00a0u0442 on u0442u0440u0435u0449u0438u043du043eu0441u0442u043eu0439u043au043eu0441u0442u0438,make me over a series of additional samples from the core material in various u0440u0430u0441u0441u0442u043eu00a0u043du0438u00a0u0445 between pillars of incision in each sample u0432u044bu043fu043eu043bu043du00a0u044eu0442 v pattern of t and the radius of r peaks, which are chosen from the following u0441u043eu043eu0442u043du043eu0448u0435u043du0438u00a0. l / i - 2, where l is u0440u0430u0441u0441u0442u043eu00a0u043du0438u0435 between pillars; i u0440u0430u0441u0441u0442u043eu00a0u043du0438u0435 from point u043fu0440u0438u043bu043eu0436u0435u043du0438u00a0 force to the top of the incision and u043eu043fu0440u0435u0434u0435u043bu00a0u044eu0442 required parameters.in addition, the sample set in the side incision.u043du0430u0433u0440u0443u0436u0430u044eu0449u0435u0433u043e emphasis w u0443u0434u0430u043bu00a0u044eu0442 incision from the emphasis on u0440u0430u0441u0441u0442u043eu00a0u043du0438u0435 i value in the range from which to choose u043du043eu043bu00a0 up to half of the u0440u0430u0441u0441u0442u043eu00a0u043du0438u00a0 l between the pillars. 1 u0437.u043f.u0444 - lu, 7).sl with a known sample u0434u043bu00a0 u0438u0441u043fu044bu0442u0430u043du0438u00a0 on u043cu0435u0436u0441u043bu043eu0439u043du044bu0439 shift containing in the central part along the long side edges and two symmetrical u0449u0435u043bu0435u0432u044bu0435 slots, the width in the r u0430u0431u043eu0447u0435u0439 zone which corresponds to the thickness of the plate material, and the height h of u0441u043eu0441u0442u0430u0432u043bu00a0u0435u0442 slots of 0.1 to 0.4 of the thickness of the slab of materialthe height h of the sample corresponds to the thickness of plates of 4 hours of yu xi