A high temperature multiaxial fatigue model with energy-type parameters based on the critical plane approach was proposed.
根据断裂实验的观察,针对拉伸主导的裂纹萌生、扩展及破坏的多轴疲劳问题,给出了一个基于临界面方法的能量型高温多轴疲劳寿命预测模型。
Then the damage parameter and critical plane are found.
为解决传统的疲劳方法对于复杂的多轴加载情况下疲劳寿命估算不理想的问题,利用有限元分析方法,研究了试件在单轴加载,双轴比例、非比例加载、三轴比例、非比例加载情况下,6种常用疲劳损伤参量随截面位置的变化情况,进而确定每一种损伤参量的最大值和相应的临界面位置。
Then a new fatigue damage model based on energy criterion in conjunction with th9 critical plane approach is proposed.
为此本文基于多轴疲劳损伤机理和疲劳试验结果,提出了一个多轴非比例加载下的疲劳寿命模型,它将临界面模型中的最大剪切面上的应力应变变程与能量模型相统一,作为新的参数纳入单轴疲劳寿命模型中。
Wang-Yu algorithm of non-circular critical slip surface for soil slop
土坡圆弧临界滑面的网鱼算法
Once a soil slope is led to the limit equilibrium state by means of the finite element – strength reduction technique,usually,the critical slip surface goes through the points at which the equivalent plastic strain takes the maximum.
对土坡而言,利用有限元-强度折减方法将边坡代入临界破坏状态时,临界滑面上的点往往是沿深部方向的等效塑了边坡的临界滑面。
Modified Monte Carlo techniques by rotating slip segments for searching general critical slip surface(Ⅰ):random angle of rotation;
Husein等人提出的MonteCarlo搜索技术进行了改进:(1)增加了若干条几何合理性条件;(2)增加了防止节点重合的机制;(3)通过确定滑面段旋转角的上、下限,使其能够适用于上凸型滑面;(4)增加了节点数调整机制,以使搜索到的临界滑面更光滑。
Based on the principle of multiaxial critical plane approach, a multiaxial fatigue damage parameter was established, which takes account for the effect of not only the maximum shear strain amplitude and normal strain amplitude on the critical plane but also the parameter of non proportionality.
以薄壁管试件为研究对象 ,分析了拉扭联合加载作用下的多轴疲劳应变变化特性·根据多轴疲劳临界平面法原理 ,以临界平面上最大剪应变幅、正应变幅以及表征材料总体损伤水平的非比例度为参数建立多轴疲劳损伤参量 ,结合Manson Coffin方程建立了多轴疲劳寿命预测模型·该模型考虑了材料总体损伤程度·模型中表征材料总体损伤的非比例度是加载参数的函数 ,与多轴疲劳应变变化特性密切相关·试验验证 ,预测寿命误差因子小于 1 5
In the approach the fatigue damage parameter is defined as the plastic energy on the critical plane.
此模型以临界平面上的塑性应变能作为疲劳损伤参量,分析了临界平面的特点并给出了损伤参量的计算过程。
Fatigue Life Prediction of Mast's Ear Plate Based on Critical Plane Method
基于临界面法的纤绳节点板疲劳损伤评估
Optimization of supercritical carbon dioxide extraction of Allium tuberosum Rottl. seed oil by response surface methodology
响应面法优化超临界CO_2萃取韭菜籽油
Analysis of Slope Stability Based on Compositely ant Colony Algorithm
用复合蚁群算法确定边坡临界滑动面
Research on Failure Criterias and Critical Slip Surfaces of Rockmass Slope;
岩质边坡失稳判据及临界滑动面确定方法研究
Study of Method for Fouling Monitoring on Heat Transfer Surface on a 1000MW Ultra Supercritical Unit
1000MW超超临界机组受热面污染在线监测方法研究
Search the Critical Slip Surface of Slope Based on Premium-Penalty Ant Colony Optimization
基于奖惩蚁群算法的边坡临界滑动面搜索研究
Approximate method of calculating critical water depth to arched section tunnel
普通城门洞形断面临界水深的近似计算法
Direct calculation of critical depth of horseshoe section tunnel
马蹄形过水断面临界水深的直接计算法
Hybrid of ant colony algorithm and genetic algorithm and its application to searching critical slope slip surface
蚁群算法与遗传算法融合及其在边坡临界滑动面搜索中的应用
Legal Aspects of Electronic Information in Foreign Library and Information Circles and How They Act;
国外图书情报界所面临的电子信息法律问题及其应对策略
Optimization for Supercritical CO_2 Extraction of Octacosanol from Sugar-cane Skin with Response Surface Methodology
响应面法优化超临界CO_2萃取蔗皮二十八烷醇工艺
Process optimization for biodiesel production from cottonseed oil under supercritical condition by response surface methodology
响应面法优化超临界条件下棉籽油制备生物柴油的研究
Optimization of Supercritical CO_2 Fluid Extraction of Apple Seed Oil Using Response Surface Methodology
响应面法优化超临界CO_2流体萃取苹果籽油的工艺研究
Research on On-line Temperature Monitoring of Heating Surface of 1000MW Ultra-supercritical Tower Type Boiler
1000MW超超临界塔式锅炉受热面壁温在线监测方法研究
Optimization for Supercritical CO_2 Extraction of β-carotene by Response Surface Method the of β-carotene
响应面法优化超临界CO_2萃取β-胡萝卜素的工艺研究
Optimization of hydrolysis of prickly ash seed oil in near critical water by response surface methodology
响应面优化法研究花椒籽油在近临界水中的水解
Optimization of Supercritical Carbon Dioxide Extraction of Effective Components from Propolis Using Response Surface Methodology
响应面法优化蜂胶超临界二氧化碳萃取工艺的研究
Provisional Legislative Council subsector
临时立法会界别分组