Calculation Model and Experimental Verification on True Strain and True Stress in Hot Tensile Test 高温拉伸试验中真应力真应变的计算及试验研究
Definition and Mechanical Characteristics of True Stress-Strain 真应力-应变的定义及其力学特征
Through the comparison of three torsion strength formulae of circular shafts, the error function, error curve and error maximum between those formulae and the formulae of true shear stress in torsion are presented. 通过对三个圆轴扭转强度计算公式的比较,给出了它们与真实扭转强度公式的误差函数和曲线及误差的最大值。
The dynamic restoration mechanisms during hot torsion were examined by the true stress true strain curves, optical and electron microscopy. 采用真应力-真应变曲线,偏振光金相和透射电子显微镜研究该合金热扭转过程的动态复原机制。
Nadai's expression is applied to the determination of true torsion stress of a cylindrical test piece. 将纳达依表达式应用于圆柱形试样扭转试验时真实扭转应力的测定。
During deformation, because of dynamic recovery and recrystallization, a turning point appears on the curve of true stress with temperature and strain rate. 这个折点的出现可能与变形过程中的动态回复与再结晶有关。
Then the shift stresses were analyzed to specify the yield locus in true stress space and rotational hardening law was adopted to embody the anisotropy induced by stresses. 分析迁移应力,确定了真实应力空间中的屈服函数,并采用旋转硬化规律考虑应力引起的土体各向异性。
In this method, the true stress& true strain curves in equal temperature and equal strain rate can be obtained more exactly. 按照这套方法可得到更加准确的等温等应变速率真应力真应变曲线。
But temperature has little influence on the shape of curve between saturated ratchetting strain and peak true stress. 温度对饱和棘轮应变~峰值真应力曲线的形状影响不大。
( c) The true stress strain curves could conform to the parabolic law. 材料的真实应力-应变曲线符合抛物线规律;
The rock deformation and failure tests are performed along various stress paths under true triaxial stress state. 在真三轴应力状态下进行了各种应力途径的岩石变形和破坏实验。
Ultrahigh carbon steel ( UHCS-3.0Si) was tested by isothermal compression physical simulation tests as spray-formed state, and true stress vs. true strain curves were obtained. 对喷射态超高碳钢UHCS-3.0Si进行了等温压缩物理模拟试验,测定了真应力-真应变曲线。
The true stress-stain curve was measured. 测量了真应力应变曲线。
Three dimension stress analysis Discussion on Properties of the Structural Variation of Unsaturated Loess under Condition of True Triaxial Stress 三维应力分析非饱和黄土在真三维应力状态下的结构变化特性初探
Study on a Calculation Model for True Stress and Strain of 304 Stainless Steel Strip Continuous Casting at High Temperature and in Hot Deformation 薄带连铸304不锈钢高温热变形时真应力真应变计算模型的研究
The mechanical behaviour of polycarbonate ( PC) is studied in this paper by tensile experiments. A set of true stress& strain curves for different strain rates is obtained. 本文通过拉伸实验研究了国产聚碳酸酯板的力学行为,得到了这种材料在不同应变速率下的真实应力&应变曲线。
The relationship of true stress and true strain for the mid-strength weldable 1420 Aluminum-Lithium alloy has been investigated in this thesis by high temperature compression testing and high temperature tensile testing on different hot deformation conditions. 本文通过高温压缩和高温拉伸试验,研究了中强可焊1420铝锂合金热变形时不同变形条件下的应力-应变关系、变形条件对合金流变应力的影响;
The calculation mold of true stress and true strain were built according to the data of load and displacement during hot deformation by matlab software. Moreover, experimental values of section area were compared to those from calculation. 根据在拉伸过程中采集的瞬时载荷、瞬时位移数据,应用Matlab软件建立了其在热变形过程中的真应力真应变计算模型,并把实际测量的截面面积与模型计算值进行了比较。
Computer Simulation on the True Strain-True Stress Curve of C-Mn Steel during Hot Deformation C&Mn钢热变形流变曲线的计算机模拟
A new and simple method, i. e. the graphical method, for determining the true torsion stress is proposed. 提出了一种新而简单的真实扭转应力测定方法,即图解法。
Based on FEM results and analysis a simple method was suggested to obtain the true stress and strain curve of orthotropic material. 在此基础上,建议了一种确定正交各向异性韧性材料真实应力-应变曲线的方法。
In calculating, power hardening function is used as the true stress-strain curve of materials. 计算时,板料的真实应力-应变曲线拟合为幂强化函数型。
The compressive true stress-true strain curves were measured and hot deformation microstructures were observed. 测试了其真应力应变曲线,观察了变形后的显微组织。
The Measurements of the Tensile True Stress-Strain Curves for the Reactor Structural Metals 反应堆结构金属材料的拉伸真应力&应变曲线测定
On the maximum classical stress intensity in condition of true plane stress with constant body force 常体力真平面应力情况经典强度理论相当应力的最大点
According to the true stress and strain curves the limitations of the material model are discussed. 根据真实的应力应变曲线讨论了橡胶材料模型的局限性。
At low strain rate, the true stress increases with true strain rapidly and enters a steady state after reached peak flow. 在较低变形速率条件下,真应力随真应变迅速增加,到达峰值后便进入稳态变形阶段;在较高变形速率条件下,真应力到达峰值后,迅速下降,随之进入稳态变形阶段。
The rotation of yield locus in true stress space is described via the rotational hardening law to embody the anisotropy. 引入旋转硬化规律,描述屈服面随着加载过程在应力空间旋转,模拟土的各向异性。