摘要
采用一种新的钻孔标定方法──有应力钻孔标定法，研究了盲孔法测量残余应力过程中外加应力与钻削加工应变的关系。结果表明，加工应变的大小不仅与应力水平有关，而且与应力性质有关。试验获得的钻孔加工应变ε＿（ｐｍ）与钻孔释放应变△ε之间的关系为一简单的线性关系：ε＿（ｐｍ）＝ａ△ε＋ｂ。武中ａ、ｂ为测量系数，与钻孔方法、被测材料等因素有关。本关系的获得使得采用刃具钻孔测量残余应力的精度有很大提高。
A new calibration method in measuring residual stress with hole-drilling strain-gagemethod was used to study the relationship between drilling strain and external stress. The re-sults indicate that the value of strains induced by drilling hole(as called drilling strain)is not only related to stress level but also with the stress sing (position or negative).The relationshipbetween the drilling strain and the stress is simple,as shown as follows:ε_(pm)=a△ε +b,in which ,a and b are the measuring coefficients concerned with drilling hole method metal material meas-ured and so on,ε_(pm) is the drilling strain, △ε is whole relaxed strains during drilling hole. Theequation makes the measuring accuracy of residual stresses with hole-drilling method with cut-ting tools improved greatly.
出处
《焊接学报》
EI
CAS
CSCD
北大核心
1994年第4期276-280,共5页
Transactions of The China Welding Institution
关键词
盲孔法
加工应变
残余应力
钻孔
hole-drilling strain gage method
drilling strain, residual stress
