| 1. | Cod . test method of crack opening displacement in welded joints
焊接接头裂纹张开位移 |
| 2. | Weighted function method for a crack opening displacement of an elliptical crack
椭圆裂纹张开位移权函数法 |
| 3. | Crack opening displacement , cod
裂纹张开位移 |
| 4. | Crack opening displacement
裂纹张开位移 |
| 5. | Crack opening angle , coa
裂纹张开角 |
| 6. | With the method of accumulation in the gray theory , a group of experiment data of crack tip opening displacement ( ctod ) at different temperatures was accumulated two times , and then the data became a smooth curve
摘要把不同温度下的裂纹张开位移( ctod )试验数据，用灰色理论中的累加方法，进行二次累加。 |
| 7. | The boundary element method ( bem ) is applied to compute crack open displacement ( cod ) . because of unit area being resolved or linear integrated , the efficiency and precision of boundary element analysis are improved greatly
采用裂纹张开位移全场拟合法( gcdfp )求出裂纹面前缘的应力强度因子（ sif ） ，所得到的sif达到与所用的裂纹张开位移（ cod ）资料同样的精度。 |
| 8. | 3 . the two stages of primary creep and steady - state creep of 3d c / sic correspond to the gradual saturation of matrix crack and the opening of these cracks respectively . the transverse crack is the main contributor to the macroscopic creep strain of 3d c / sic , and its opening is controlled by the creep temperature
( 3 ) 3dc sic复合材料的减速蠕变阶段和稳态蠕变阶段分别对应着基体裂纹趋于饱和和逐渐张开这两个过程；横向基体裂纹是3dc sic复合材料宏观蠕变应变的主要贡献者，温度是影响横向裂纹张开速度的一个重要因素。 |
| 9. | The opening stress and the life of crack growth is calculated and compared with the test results and the experience formula . the feasibility of the newman theory of opening stress used in the high strength steel is validated . then through the slice synthesis method , the three dimension surface crack of the weld joint of cone - cylinder is decomposed into many plane through cracks
本文将基于裂纹闭合现象建立的带状屈服模型，用在平面贯穿裂纹中，计算此时的裂纹张开应力和疲劳裂纹扩展寿命，与试验结果和经验公式比较，验证newman裂纹张开应力理论在高强钢中的可行性；然后，用切片合成法，把潜艇结构凸锥柱结合壳焊缝处的三维表面裂纹分解成平面贯穿裂纹，用带状屈服模型的理论来分析平面贯穿裂纹，得到裂纹沿深度方向的扩展速率，进而得到潜艇结构的疲劳寿命。 |
