發(fā)布時間：2018-05-21 19:44

  本文選題：平臺巴西圓盤 + T應力��； 參考：《巖土力學》2016年S1期

【摘要】：平臺巴西圓盤(CFBD)具有避免加載點處應力集中、保證破壞由預制裂紋尖端處起始的優(yōu)點,成為研究脆性材料斷裂性能的常用試件之一。最近的研究發(fā)現(xiàn),T應力也會影響材料斷裂性能,但平臺巴西圓盤并沒有計算T應力的解析公式。使用解析分析與有限元數(shù)值分析相結合的方法,對復合型加載條件下平臺巴西圓盤試件的T應力進行了計算,并對誤差進行了系統(tǒng)的分析。結果表明,在一定載荷分布角內(nèi)相對裂紋長度?≤0.65時,不管是純I、純II還是復合型加載條件下平臺巴西圓盤計算的T應力都可以用中心裂紋巴西圓盤均布載荷下T應力計算公式來計算;T應力相對誤差隨著相對裂紋長度的增加而增加。
[Abstract]:The platform Brazilian disc CFBD has the advantages of avoiding stress concentration at the loading point and ensuring that the failure begins at the tip of the precast crack. It has become one of the commonly used specimens to study the fracture properties of brittle materials. Recent studies have found that T stress also affects the fracture properties of materials, but there is no analytical formula for calculating T stress on the platform Brazilian disc. In this paper, the T stress of Brazilian disc specimen under composite loading condition is calculated by using the method of analytical analysis and finite element numerical analysis, and the error is analyzed systematically. The results show that when the relative crack length in a certain load distribution angle is 鈮，

本文編號：1920498