Study on simplified identification method to determine relationship between principal stresses and principal planes in plane stress state;
主应力与主方向角对应关系的简捷判别方法
Application of stress-index method to principal stress and ultimate stress design for arch dams;
应力指数法在拱坝主应力满应力设计中的应用
It is very difficult to determine the directions of the principal stresses or strains in plane problem for teaching material mechanics and engineering application.
平面应力和平面应变状态下主应力和主应变方向的确定,无论是在工程应用还是在材料力学教学中都是非常重要的难点。
Residual stresses of three directions are measured by XRD,and the counting formula of the main stress is built.
用X射线应力测定仪进行了三个方向残余应力的测量,建立了主应力计算公式,分析其形成机制与分布特性。
The earth stress and the maximum main stress direction in Baolang oilfield are calculated and analyzed.
运用声发射凯塞尔效应法,对宝中、宝北三口井4组岩样的地应力进行了测试,并对宝浪油田地应力大小以及最大主应力方向进行了计算和分析。
This experiment based on the four concentration forces exposed the relation of main stress and strain.
利用二次曝光法，在外力作用下对以（１００）面单晶硅为样品所构造的四点简支梁模型的应变进行了测量，并分析了样品的主应力，从而得出该样品的一个弹性常数，对反应应力与应变关系的弹性矩阵示性曲面进行了初步探索。
Effect of principal stress ratio in plane strain condition on void damage evolution;
平面应变下的主应力比对微孔洞损伤演化行为的影响
The formula of tube expanding force is deduced using the slab method.
采用主应力法推导圆管扩径时扩径力的解析式。
material thickness variety and material work-hardening,which should not be omitted during the course of deformation processes,a new formula and its concrete expression of expanding pressure calculation P=f(K、n、μ、α、r、r_0、k_e、t_0、t=f(t_0、r_0、R)) is set up by utilizing slab method that belongs to one of the theoretic methods solving the proble.
依据扩口变形区材料的应力应变特点,考虑变形过程中材料厚度变化及加工硬化两个不应该被忽略的具有本质特征的影响因素,利用金属塑性成形问题求解的理论方法中的主应力法,推导和提出了冲压加工基本工序之一的扩口工序之扩口力计算的一个新公式P=f(K、n、μ、α、r、r0、ke、t0、t=f(t0、r0、R))及具体表达式。
The main stress method is employed to analyse the stress produced in the cold extrusion of three way pipes and a formula of extrusion force is derived.
采用主应力法 ,对三通管的液压胀形进行应力分析 ,推导出成形力的计算公式。
Taking forward extruding as an example,this paper infers a theoretical calculation formula for unit extruding force with primary stress algorithm in the plastic deformation.
以正挤压为例 ,利用塑性变形问题的主应力解法 ,推导了单位挤压力的理论计算公式。
This paper concerns with a new method for determining primary stress direction.
探讨了确定主应力方向的一种新方法,该方法运用高等数学的极值理论确定主应力方向。
It is shown that principal strain criterion is only suitable for the isotropic membranes and principal stress-principal strain criterio.
本文对目前常用的判别柔性材料受力状态的3种准则进行了详细论述,分别讨论了各自的原理及存在的问题,得出主应变准则只能适用于各向同性膜材,主应力_主应变准则对各向同性和正交异性膜材均能适用。
By giving any angle strain rosette readings, the principal strain and the principal direction are calculated.
在结构试验中采集到的成百上千个已知任意角度应变花的读数 ,可用本文编写的计算机程序确定其主应变、主应力及主方向 ,从而替代了科研人员大量的手工计算 ,既省时省力 ,又减少差错 。
The strain, geometric equation and principal strain of the elastic solid are all-sidedly studied by using the method of dyad analysis.
利用并失分析法，对弹性体的应变、几何方程和主应变进行了全面研究。
Through data processing,the principle stress of each unit and the point on vertical and horizontal lines is drawn.
对两端固定斜接弯头管四种受载工况进行了力学分析并用有限无法进行了全面的应力计算，通过数据处理找到各单元主应力及最大主应力点，同时绘出该点在纵向线及横向线的应力分布，可供工程配管设计参考。
Research purposes: For controlling the appearance of web inclined crack in large span box girder bridge,the paper researched on two influence factor of web’s principle stress,which involved the construction form of vertical prestressed reinforcement and web thickness change in different fashion.
研究目的:为控制大跨度箱梁桥腹板斜裂缝的出现,对腹板主应力的两项影响因素,竖向预应力筋的构造形式和腹板厚度变化方式进行了研究。
To avoid the web inclined crack in large span prestressed box girder bridge,the paper discusses the three influence factors of web s principle stress.
为预防大跨度预应力混凝土箱梁桥腹板斜裂缝的出现,从影响腹板主应力的3个方面:纵向预应力钢筋布置方式、竖向预应力筋的构造形式和腹板厚度的变化方式,进行了研究和探讨。