| 1. | Symmetry circulating stress
对称循环应力 |
| 2. | Low - cyclic fatigue damage of single crystal nickel - based superalloy under the action of asymmetrical load
非对称循环载荷下镍基单晶合金低周疲劳损伤研究 |
| 3. | Fatigue damage of materials with small cracks calculated by the multiplication - method under symmetrical cyclic loading
用乘积法计算含小裂纹材料在对称循环加载下的疲劳损伤 |
| 4. | Based on the predicting model of effective stress concentration factor , estimating methods of s - n curve for welded steel structures are set up under symmetrical and unsymmetrical stress cycle respectively
本文以有效应力集中系数预测模型为基础，分别建立了对称循环和非对称循环时焊接钢结构s - n曲线的理论预测方法。 |
| 5. | By introducing the concept of the worst - case notch , the theory prediction model of the effective stress concentration factor for welded steel structures are established for symmetrical and unsymmetrical stress cycle respectively
本文在引入“最坏切口”概念的基础上，分别建立了对称循环和非对称循环时焊接钢结构有效应力集中系数的理论预测模型。 |
| 6. | The definition of a mixed block matrix is given , and an algorithm for the inverse of a given mixed block matrix over a group algebra of a finite group over a field is presented , and a method of determining singularity of this mixed block matrix is given
?给出了域上有限群的群代数上的块对称循环矩阵的奇异性判别法及其逆矩阵求法. ，定义了域上有限群的群代数上的混合块矩阵，并给出了它的可逆性的判别法及其逆矩阵的求法 |
| 7. | By means of area method and stress field intensity approach and computational analysis of finite element , the fatigue strength of misaligned welded joint , " t " type of plate welded joint and cruciform joint are estimated . estimations are consistent with fatigue testes
利用面积法和应力场强法，通过有限元计算分析，预测了错位板接头、 t型板接头和十字型板接头在对称循环和非对称循环时的疲劳强度，并与疲劳试验进行了比较，理论预测与试验基本一致。 |
