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OALib Journal期刊
ISSN: 2333-9721
费用：99美元
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一种估算结构钢室温蠕变的方法
DOI: 10.3724/SP.J.1037.2010.00336, PP. 179-184
Keywords: 室温蠕变,结构钢,拉伸实验,应变速率
Abstract:
研究了轧制态、正火态X70管线钢和AISI304不锈钢的室温蠕变行为,发现在数种应力水平下此2种钢主要呈现为速率递减的对数蠕变特征.室温蠕变和拉伸实验的关系表明,室温蠕变实验中的加载过程与拉伸实验相同,且室温蠕变开始时的应变速率与加载过程结束时的相等.在此基础上,结合室温蠕变本构方程和描述拉伸实验中应力-应变关系的Ramberg-Osgood公式,提出了基于外加应力估算结构钢室温蠕变的方法.该方法得到的X70管线钢和AISI304不锈钢室温蠕变量的估算结果与实验值符合得较好,误差均在2倍因子之内.
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