The crack tip fields and out-of-plane stress constraint of the specimens were analyzed using three dimensional elastic-plastic theory.
以三维弹塑性断裂理论为基础,对有限厚度板裂纹端部应力场、三维应力约束进行了分析,通过对不同厚度、不同初始裂纹长度在不同温度下三点弯曲试件的断裂韧性测试断口观测和理论分析获得如下结果:离面约束对裂尖应力场及断裂韧性有强烈的影响;断口均产生分层裂纹,其位置、大小和数量与试样厚度、温度和裂纹初始长度有关;温度较低时,分层裂纹距主裂纹根部一定距离,分层裂纹宽度较小,对厚度效应影响较小;温度较高时,分层裂纹首先出现在主裂纹根部,分层裂纹宽度较大且充分张开,降低了试样的有效厚度。
Differential variational principles of systems with unilateral constraints in non-inertial reference frame;
非惯性系中单面约束系统的微分变分原理
Perturbation to symmetries and adiabatic invariant of Birkhoffian systems with unilateral constraints;
单面约束Birkhoff系统对称性的摄动与绝热不变量
Lie symmetries and conserved quantities of third-order nonholonomic systems with unilateral constraint in phase space are studied.
研究相空间中具有三阶线性单面约束的非完整系统的Lie对称性与守恒量。
In the light of the principle that the optimum solution of a structure must occur at the boundary of feasible domain, limiting search scope in the restrain curved surface, with the result that the original restrain extreme value problem could be transformed non-restrain one, we can solve the problem using more simple non-restrain optimum method,this method does be boundary search one.
边界搜索法是根据结构优化最优解必定出现在可行域边界上的原理,将搜索范围限定在约束曲面上,使原来的约束极值问题转化为无约束极值问题,因而可用比较简单的无约束优化方法来求解。
Based on three-dimensional finite element analyses,the effect of different notch angles,plate thickness and crack length on stress intensity factors(SIF) and out-of-plane stress constraint factors(T_z) are revealed and the scale of 3-D constraint area is also analyzed.
研究结果显示:当缺口张开角小于60度时,不同缺口的应力强度因子和离面约束因子的分布基本一致,角度的影响不明显。
Numerical Value Analysis of Multibody Systems with Unilateral Constraint;
带有单面约束的多体系统的数值分析
Symmetries and Non-Noether Conserved Quntities of Systems with Unilateral Constraints;
单面约束系统的对称性与非Noether守恒量
Differential variational principles of systems with unilateral constraints in non-inertial reference frame;
非惯性系中单面约束系统的微分变分原理
Integrating Factors And Conservation Theorems For Nonholonomic Dynamical Systems With Unilateral Constrains;
具有单面约束的非完整动力学系统的积分因子和守恒定理
Restricted Structural Breaks Models and Unit Root Test in Panel Data;
受约束结构突变模型与面板单位根检验
Noether s theory for mechanics systems with unilateral holonomic constrains;
具有单面完整约束的力学系统的Noether理论
STUDY ON STRESSES CHARACTERISTICS OF MEMS SCANNING MICROMIRROR WITH END-RESTRAINED SINGLE CRYSTAL SILICON TORSION BAR
端面约束单晶硅直梁MEMS扫描微镜应力特性研究
All orders will be subject to our written acceptance.
此报盘没有约束力。所有订单以我方书面接受为准。
Vibration Reduction Performance Analysis on Single Layer Cylindrical Reticular Dome with Buckling-Restrained Braces;
约束屈曲支撑在单层柱面网壳结构中的减震效果分析
Monocular Vision Location System of Polishing Robot with Four Degrees of Freedom Based on the Distance and Plane Constraints on Feature Points
特征点距离及平面约束的研抛机器人四自由度单目视觉定位系统
Nonmonotonic Trust Region Algorithms for Unconstrained and Constrained Optimization;
无约束优化与约束优化的非单调信赖域算法
A METHOD FOR MARSHALLING SINGLE GROUP TRAINS IN A NETWORK WITHOUT CONSTRAINTS
路网上无约束单组列车编组优化方法
The Restraining Force of the System Wholeness over Complexity and Simplicity
复杂性、简单性与系统整体性的约束
Generalized Monotone Line Search SQP Algorithm for Constrained Minimax Problems;
约束MINIMAX问题的广义单调线搜索SQP算法
The Research on Algorithm of Multiple Constraints Single Path Routing Problem;
IP网络多约束单路径路由算法的研究
Research of Single Product Common Distribution on the Basis of Time Restraint;
基于时间约束的单产品共同配送研究
Hermite Insert-value Research On Simple Restraint Unlineness Plan;
简单约束非线性规划的Hermite插值研究
Semantic Service Matchmaking for Autonomic Unit with QoS Constraints
支持QoS约束的自主单元语义服务匹配