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由我校基础部副教授孙燕君及研究生许立明研究的《复合型载荷下裂纹顶端塑性问题的进一步研究——延性裂纹扩展判据的研究》项目,本月16日在校组织的评审会上通过评审。这项研究进行了大量带有不同中心倾角裂纹薄板延性裂纹扩展光弹性试验。首次运用实验——数值计算相结合的混合法确定延性裂纹顶端的应力场,并以此为边界条件,用Rice公式计算了一组实验中J积分随延性裂纹扩展的变化规律。提出了一个新的延性裂纹稳定扩展评据。
The project “Study on the Ductile Crack Propagation Criterion under Compound Loads—Study on the Ductile Crack Propagation Criterion under Compound Loads” by Sun Yanjun, Associate Professor of the Basic Department of the University and Xu Liming of the graduate student, was reviewed on the 16th of this month at the judging panel of the school organization. This study carried out a large number of photoelastic experiments with ductile crack propagation for cracked sheets with different center dip angles. For the first time, the stress field of the ductile crack was determined by the hybrid method of experiment-numerical calculation. Using this formula as the boundary condition, the law of J integral with ductile crack propagation in a set of experiments was calculated. A new ductile crack stability extension review was proposed.