Improvements in Residual Stress Measurement by the Incremental Centre Hole Drilling Technique
Improvements in Residual Stress Measurement by the Incremental Centre Hole Drilling Technique
复制标题
渐进式中心孔钻削技术对残余应力测量的改进
DOI：
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发表时间：
2006
期刊：
影响因子：
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通讯作者：
P. Whitehead
中科院分区：
文献类型：
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作者：
D. Stefanescu;C. Truman;D. Smith;P. Whitehead
本文介绍了改进和改进增量式中心孔钻孔作为一种测量近地表残余应力场的方法的有用性、准确性和效率的结果。特别强调为要使用的钻进步长的数量及其相应的大小提供最佳值。对于孔半径与应变计花环半径的不同比率，以表格数据的形式给出了在测量过程中使用的步数和步长的最佳值的指导方针。这些准则随后被合并到一个新的数据分析程序中，该程序允许在实际部件中准确地确定非常接近表面的残余应力场。通过报告对三个工业部件进行的测量结果，强调了新方法的好处，每个部件都经过了众所周知的工程过程。这些部件是喷丸弹簧钢、搅拌摩擦焊接铝合金和钛合金，它们经历了三种不同的加工工艺。结果表明，中心孔增量钻进技术的改进可提供10~10~1 mm深度的残余应力测量结果。
This paper presents results which advance and improve the usefulness, accuracy and efficiency of incremental centre hole drilling as a method of measuring near surface residual stress fields. Particular emphasis is placed on providing optimal values for the number of drilling step increments to be used and their corresponding size. Guidelines on the optimal values for the number and size of steps to use during measurements are presented for various ratios of hole radius to strain gauge rosette radius in the form of tabulated data. These guidelines are subsequently incorporated into a new data analysis program which permits very near surface residual stress fields to be accurately determined in real components. The benefits of the new approach are highlighted by reporting the results of measurements made on three industrial components, each of which has been subjected to a well-known engineering process. These components are a shot-peened spring-steel, a friction stir welded aluminium alloy, and a titanium alloy subjected to three different machining processes. The results reveal that the improvements to the incremental centre hole drilling technique can provide measured residual stresses from depths ranging from about 10 $$mu $$m to 1 mm.