广西大学学报(自然科学版)
廣西大學學報(自然科學版)
엄서대학학보(자연과학판)
JOURNAL OF GUANGXI UNIVERSITY (NATURAL SCIENCE EDITION)
2015年
4期
890-896
,共7页
李柳%秦胜欢%熊再银%张克实
李柳%秦勝歡%熊再銀%張剋實
리류%진성환%웅재은%장극실
纯铜%断裂应变%平板剪切试样%Lode参数%应力三轴度
純銅%斷裂應變%平闆剪切試樣%Lode參數%應力三軸度
순동%단렬응변%평판전절시양%Lode삼수%응력삼축도
pure copper%fracture strain%plate shear specimen%Lode parameter%stress triaxiality
用纯铜平板剪切试样进行破坏试验,对试样的断口倾角、韧带截面和断裂截面的应力三轴度、Lode参数进行了计算分析,并通过实测给出破坏区域的断裂应变估计,从而给出平板剪切试样剪切断裂应变与光滑试样拉伸断裂应变的比较,两者近似相等。该结果证实Rice-Tracey指数函数公式与实测断裂应变规律不符,从而说明Rice-Tracey指数函数公式在应用过程中存在局限性。
用純銅平闆剪切試樣進行破壞試驗,對試樣的斷口傾角、韌帶截麵和斷裂截麵的應力三軸度、Lode參數進行瞭計算分析,併通過實測給齣破壞區域的斷裂應變估計,從而給齣平闆剪切試樣剪切斷裂應變與光滑試樣拉伸斷裂應變的比較,兩者近似相等。該結果證實Rice-Tracey指數函數公式與實測斷裂應變規律不符,從而說明Rice-Tracey指數函數公式在應用過程中存在跼限性。
용순동평판전절시양진행파배시험,대시양적단구경각、인대절면화단렬절면적응력삼축도、Lode삼수진행료계산분석,병통과실측급출파배구역적단렬응변고계,종이급출평판전절시양전절단렬응변여광활시양랍신단렬응변적비교,량자근사상등。해결과증실Rice-Tracey지수함수공식여실측단렬응변규률불부,종이설명Rice-Tracey지수함수공식재응용과정중존재국한성。
The rupture experiments were conducted by using plate shear specimen of T2 pure cop-per. The fracture dip angle, the stress triaxiality and Lode parameters at the ligament section and the fracture section of the specimen were analyzed and calculated, and the fracture strain of failure area was estimated, which gave the comparison of shear fracture strain with tensile fracture strain of the material. Both the two strains are approximately equal. The results imply that Rice-Tracey exponen-tial function formula does not match the fracture strain data by the experiment, which also shows the limitations of Rice-Tracey exponential function formula in its application.