| 1. | Reflection and refraction of elastic waves at a unilateral contact interface between two generally anisotropic media
一般各向异性单侧接触界面上波的反射和折射 |
| 2. | So far , in the fem analysis , the contact interfaces usually are taken as the joint element , which was introduced by goodman early in 1968
在有限元中计算中，常用的方法是利用节理单元来模拟接触面。 |
| 3. | In conclusion , taken . as contact problems , the mechanical properties of contact interface can be reflected more perfectly
论文的最后对本文方法中一些尚待改进的问题及今后的发展方向作了分析和讨论。 |
| 4. | The key point in the research of the instability is how to capture exactly the movement of the contact interface
在界面不稳定性的数值研究中，最核心的当是运动界面的精确描述，正是由于这?需要使得虚拟流动界面捕捉( ghostfluidmethod )方法得以充分发展。 |
| 5. | Presently , as a widely used technique in finite element analysis for geotechnical , problems , the contact interfaces usually are taken as the joint element , which was introduced by goodman eary in l968
本论文的主要目的就是试图将它作为接触问题处理，建立相应的计算公式及方法，并用于上述岩土工程问题的求解。 |
| 6. | In this paper , based on comprehensive analysis of the dynamic variation of the contact interface between the workpiece and its dies , material methods to identify and handle the dynamic interface conditions are presented
本文在全面分析成形中工件与模具接触边界动态变化的基础上，给出了动态边界条件识别与处理的具体方法。 |
| 7. | When plastic fem is used to numerically simulate the process of sheet metal forming , handling of dynamic contact interface conditions between the workpiece and its dies is needed to obtain credible computational results
采用塑性有限元法对金属板料成形过程进行数值模拟时，为获得可信的计算结果，需要对工件与模具间动态接触边界条件进行处理。 |
| 8. | Nevertheless , in the model , the contact interfaces are charactered simply with stiffness kn and ks , whick is not perfect and rigorous in the view of solid mechanics and rather rough for the description of the behavior of the interfaces
本论文对这种方法经过分析之后，发现这种处理方式对接触面的描述并不合理，也无法反映出接触面的主要力学特征。 |
| 9. | Abstract : when plastic fem is used to numerically simulate the process of sheet metal forming , handling of dynamic contact interface conditions between the workpiece and its dies is needed to obtain credible computational results
文摘:采用塑性有限元法对金属板料成形过程进行数值模拟时，为获得可信的计算结果，需要对工件与模具间动态接触边界条件进行处理。 |
| 10. | In this paper , we developed a new kind of interface capturing method which use the level set equation to keep track of the interface location as the zero level and use the ghost fluid method to propagate the contact interface disturbed by r - m instability or r - t instability
由于该类方法是以数学方程的物理解的性质为基础，通过设置一个距离函数( levelset函数)来标志界面所在的位置，从而能够够精确地捕捉到界面的发展，而不会出现非物理解的现象。 |
