摘要
应用线弹性全局应力，位移场和ｌｒｗｉｎ塑性区假设，对Ⅰ型裂纹问题给出准脆断情形下的裂纹尖端张开位移（ＣＯＤ）的修正算式，计算结果表明，该文所计算的δ比原δ０之值有所提高，应用偏于安全。
Based on the linear elastic overall -stress. displacement field and Irwin plastic region hypothesis. the correction formula of crack opening displace (COD) is given for I model crackle under quasi--brittle fracture. The result of calculation indicates that the δ obtained our formula is more accurate than the former δ0 Therefore it is safer in applied.
