A definition of inner variable to describle the crack-healing process is put forward.
笔者在连续介质热力学框架内,由热力学第二定律推导出裂纹愈合耗散不等式,定义了描述金属材料内部裂纹愈合过程的热力学内变量H。
An inner variable H is defined which describes the process of crack healing.
在连续介质热力学框架内,以热力学第二定律为出发点,推导出裂纹愈合耗散不等式,确定了描述裂纹愈合过程的热力学内变量H的定义形式。
Typical continental intraplate deformations developed within the craton interior where are several hundreds to more than 2 000 km away from the synchronous active plate boundaries.
典型大陆板内变形发生在克拉通化的大陆岩石圈内部,距离同变形期活动板块构造边界数百至2000km以上。
There are widespread and rather strong intraplate deformations in Chinese continent.
中国大陆板内变形普遍比较强烈。
This paper summarizes various structural models, structural belts, Cenozoic deformation frameworks and tectonic evolution concerning intraplate deformation in the West Kunlun - Pamir Cenozoic erogenic belt and Southwest Tarim foreland basin and suggests that the Cenozoic intraplate deformation be characterized by segmentation and stage evolution.
笔者总结了西昆仑—帕米尔造山带及塔西南前陆盆地板内变形的各类构造模式、构造分带、新生代变形格局及构造演化,提出其新生代板内变形具有弧形构造分段性和阶段性演化的特点,发现了依格孜牙、柯克亚、桑株—杜瓦、卡兹克—阿尔特薄皮弧形推覆构造、齐姆根主弧形构造段及玉力群—克里阳构造段的三角带构造及叶尔羌—棋盘对冲过渡型弧形构造。
Research on the constitutive relation of geomaterials based on the theory of internal variable;
基于内变量理论的岩土材料本构关系研究
In the framework of visco-plastic constitutive theory without yield condition,some assumptions dealing with internal variables,internal stress and different potential hardening of material were used to develop new evolutionary equation of internal variables.
在无屈服条件的粘塑性本构理论框架内,提出了关于内变量和内应力以及材料具有不同硬化趋势的假设,并在Bodner-Partom模型的基础上,发展了新的内变量演化模型,即双级硬化模型(Two StagesHardening,TSH模型)和多级硬化模型(Multi-Stages Hardening,MSH模型),提高了Bodner-Partom模型对同时模拟应变率相关单调拉伸和循环特性的精度,特别是增强了对Ratcheting的模拟能力,使得无屈服条件的本构方程以较高精度模拟Ratcheting成为可能。
Taking plastic strain and non-local damage as internal variables,drawing in the dissipa-tion potential and applying the continuum damage mechanics and the second law of thermo-dynamics,a constitutional equation of non-local and non-elastic damage is established whichmakes it possible to describe allsidedly the constitutional behavior of material.
将塑性应变和非局部损伤取为内变量，引入耗散势，利用连续介质损伤力学和热力学第二定律，建立了一个能全面描述材料本构行为的非局部非弹性损伤本构方程，用该模型计算了单位、单压状态下混凝土材料及20#钢的应力-应变关系曲线，取得了较好的结果。
This article deeply explores and analyzes the concept of species, discusses some ways and biological essence of the intraspecific variation of Chinese medicinal materials, expounds views and methods concerning species in the study of TCM, po.
本文对物种的概念进行了深入的探讨和剖析;论述了药材种内变异的若干方式及其生物学实质;阐明了中药研究中的物种观点和方法;指出了物种或种在中药的安全性、有效性和质量稳定性方面的重要作用和意义;最后,提出物种观点和生物多样性的利用对策。
philoxeroides description, intraspecific variation from native to introduced regions, its life history strategies, invasion mechanisms, and management strategies.
本文结合对喜旱莲子草在原产地的分布状况的考察、原产地和入侵地喜旱莲子草的比较研究,以及入侵生态学研究的最新成果,对该物种在原产地的地理分布和种内变异、生活史特征、入侵机制和控制策略等方面进行评述,以提高我国科研人员对这一外来入侵种的认识,为科学管理和控制提供依据。