{"title":"USING A LEADER SAMPLE TO PREDICT THE CREEP AND LONG-TERM STRENGTH OF A MATERIAL DURING DUCTILE FRACTURE","authors":"V. P. Radchenko, E. A. Afanaseva, M. N. Saushkin","doi":"10.1134/s0021894423060238","DOIUrl":null,"url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>A method is developed for predicting creep and long-term strength based on the behavior of a previously tested sample (leader sample, prototype) in the case of ductile fracture. It is assumed that a loaded material does not undergo instantaneous plastic deformation and the first stage of creep. The incompressibility hypothesis is fulfilled in this case. It is shown that, if a constant-stress creep curve and the time to fracture are known for a leader sample, then obtaining a diagram of rheological deformation and long-term strength of the material at other stress values requires knowing only the initial (at the initial time) minimum creep strain rate of the samples for these stress values. The relevance of the developed method is checked with experimental data in two types of tests. The first type is tension tests of 12Kh18N10T corrosion-resistant steel samples at a temperature of 850°C and titanium alloy samples at a temperature of 600°C and the second type is tension and torsion tests of D16T alloy samples at a temperature of 250°C. It is shown that the prediction results are independent of the choice of a leader sample from many samples tested at different stresses. The possibility of using the developed method in experimental studies of creep of materials until their fracture is discussed.</p>","PeriodicalId":608,"journal":{"name":"Journal of Applied Mechanics and Technical Physics","volume":null,"pages":null},"PeriodicalIF":0.5000,"publicationDate":"2024-02-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of Applied Mechanics and Technical Physics","FirstCategoryId":"5","ListUrlMain":"https://doi.org/10.1134/s0021894423060238","RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q4","JCRName":"MECHANICS","Score":null,"Total":0}
引用次数: 0
Abstract
A method is developed for predicting creep and long-term strength based on the behavior of a previously tested sample (leader sample, prototype) in the case of ductile fracture. It is assumed that a loaded material does not undergo instantaneous plastic deformation and the first stage of creep. The incompressibility hypothesis is fulfilled in this case. It is shown that, if a constant-stress creep curve and the time to fracture are known for a leader sample, then obtaining a diagram of rheological deformation and long-term strength of the material at other stress values requires knowing only the initial (at the initial time) minimum creep strain rate of the samples for these stress values. The relevance of the developed method is checked with experimental data in two types of tests. The first type is tension tests of 12Kh18N10T corrosion-resistant steel samples at a temperature of 850°C and titanium alloy samples at a temperature of 600°C and the second type is tension and torsion tests of D16T alloy samples at a temperature of 250°C. It is shown that the prediction results are independent of the choice of a leader sample from many samples tested at different stresses. The possibility of using the developed method in experimental studies of creep of materials until their fracture is discussed.
期刊介绍：
Journal of Applied Mechanics and Technical Physics is a journal published in collaboration with the Siberian Branch of the Russian Academy of Sciences. The Journal presents papers on fluid mechanics and applied physics. Each issue contains valuable contributions on hypersonic flows; boundary layer theory; turbulence and hydrodynamic stability; free boundary flows; plasma physics; shock waves; explosives and detonation processes; combustion theory; multiphase flows; heat and mass transfer; composite materials and thermal properties of new materials, plasticity, creep, and failure.
京公网安备 11010802042870号
京ICP备2023020795号-1
分享
求助内容：
应助结果提醒方式：
扫码关注我们
