Abstract Due to residual stress effects in final parts, researchers have always been interested to measure residual stress in different structures as well as comparing and analysing different methods in order to increase the accuracy and select the best method to measure it in different conditions and materials. The hole-drilling by applying the rosette strain gauge is one of the most commonly used methods for measuring residual stress and besides, the use of digital image correlation (DIC) method is expanding because of its advantages in measuring residual stress. So, these two methods have been studied by researchers. In this study, the results of residual stress measurements on composite plate by the hole-drilling and DIC methods are compared, but employing the Mohr's circle in this comparison as an innovation is discussed to understand better this issue. Also, considering that the other researchers have usually paid attention to measure the residual stress immediately just after drilling in the hole-drilling method using the strain gauge. Thus, the effect of elapsed time on the residual stress measurement is investigated in the results application. In both of these methods, the residual stress is calculated based on the principles of calibration coefficient measurement and the finite element method (FEM).

中文翻译：

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基于莫尔圆并考虑时间效应的DIC和钻孔方法对复合板残余应力的试验与计算分析

摘要 由于最终零件的残余应力影响，研究人员一直热衷于测量不同结构的残余应力，并比较和分析不同的方法，以提高精度并选择最佳方法在不同条件和材料下进行测量。应用玫瑰花应变片钻孔是测量残余应力最常用的方法之一，此外，数字图像相关（DIC）方法因其在测量残余应力方面的优势而得到广泛应用。所以，这两种方法已经被研究人员研究过。在本研究中，比较了钻孔法和 DIC 法对复合板残余应力测量的结果，但采用 Mohr' s 圈在此比较中作为一项创新进行了讨论，以更好地理解这个问题。另外，考虑到其他研究人员通常注意在钻孔方法中使用应变仪测量刚钻孔后的残余应力。因此，在结果应用中研究了经过时间对残余应力测量的影响。在这两种方法中，残余应力的计算都是基于校准系数测量和有限元法（FEM）的原理。在结果应用中研究了经过时间对残余应力测量的影响。在这两种方法中，残余应力的计算都是基于校准系数测量和有限元法（FEM）的原理。在结果应用中研究了经过时间对残余应力测量的影响。在这两种方法中，残余应力的计算都是基于校准系数测量和有限元法（FEM）的原理。