| 1. | The limitation of this empirical material constant is discussed
这是本文的重要创新点之一。 |
| 2. | At the same time , according to the related temperature stress theory and the related material constant which provides previously , the temperature stress is calculated
同时,按照有关温度应力理论,根据上述室内试验研究成果所提供的有关材料常数,进行了温度应力理论计算工作。 |
| 3. | There is a criteria triaxiality , which is a material constant , which when triaxiality of material is larger than the fracture belongs to void - mode , and in reverse , belongs to shear - mode
存在材料常数? ?临界应力三轴度，材料内应力三轴度高于临界值时，断裂为韧窝型的，反之，为剪切型的。 |
| 4. | In the paper , the forming limits in hemispheric punch bulging processes of aluminum alloy ly12 ( m ) , lf21 and steel stl7 are predicted by the ductile fracture criterion and calculation method of material constant advanced by the author
本文应用作者提出的韧性断裂准则及材料常数的确定方法预测了铝合金板和钢板的半球形凸模胀形的成形极限。 |
| 5. | Assume that material constants exponential functions or power functions of spatial variable , the related bending fracture models are set , i . e . a series of boundary value problems of partial differential equations are established
再将材料常数依次设为空间变量的指数函数和幂函数，建立了相应的弯曲断裂模型，即一系列相关的偏微分方程的边值问题。 |
| 6. | The effects are on the probabilistic assessment of both scattering regularity and sampling size of the test s - n data . p - s - n curves are characterized by the scale and location parameters related s - n relations for the maximum value model . the materials constants of in the scale relations are given by the average s - n relations and the locations
曲线用极大值分布的位置与尺度参量s - n关系曲线来表征，尺度参量s - n关系曲线可表示成均值与位置s - n曲线的函数；均值曲线的材料常数应用最小二乘法求出，位置曲线参数通过极大值分布的似然函数解出。 |
| 7. | It is thought that the fcp resistance comes from the material constants of mechanical property , i . e . , young ' s modulus , the fcp threshold and the fracture toughness , which may be called three essentials of fcp . the materials with higher young ' s modulus , the fcp threshold and the fracture toughness will have lower fcp rates
提出了裂纹扩展阻力三要素的概念，认为弹性模量e 、扩展门槛值k _ ( th )和断裂韧性k _ c是构成材料疲劳裂纹扩展抗力的三个最基本的要素；材料具有高的弹性模量e 、扩展门槛值k _ ( th )和断裂韧性k _ c ，其疲劳裂纹扩展速率也愈低。 |
| 8. | From basic equations of elastic mechanics , related knowledge of fracture mechanics and frequent used methods of differential and integral calculus , bending fracture models of anisotropic functionally graded materials is established by assuming that material constants ( stiffness matrix component ) are expressed in arbitrary functions
根据弹性力学的基本方程以及断裂力学的有关理论及微积分方法，将材料常数（刚度系数）设为空间变量的任意函数，建立了各向异性功能梯度材料板弯曲断裂模型，即三类偏微分方程边值问题。 |
| 9. | This dissertation presents a hypoelastic constitutive model with four material constants in describing the mechanical behavior of granular materials under loading . analysis results of the model have good coincidence with those of triaxial experiment of the standard sand under different relative density . the model can describe the contractant and dilatant phenomena of granular materials
提出了一种含4个材料常数的亚弹性本构模型，来描述散粒体在加载时的力学行为，本模型的分析结果与不同相对密度下标准砂的三轴实验可较好地吻合，能反映散粒体的剪缩、剪胀现象，还对如何用三轴实验数据来确定这4个材料常数，给出了适宜的计算方法。 |
| 10. | A suitable calculation method is given to identify the fore material constants using trialxial tests . in comparison with the hypoplastic constitutive model presented by w . wu and d . kolymbas , this model has the advantage of form simplicity . the determination method of material constants presented in this dissertation avoids disadvantage that material constants vary with the chosen reference point
该模型与wwu .和dkolymbas提出的亚塑性本构模型相比，具有形式简单的优点，所提供的材料常数确定方法，克服了亚塑性模型中因选取参考点的不同所确定的材料常数值变化大的弊病。 |
