The true stress-stain curve was measured.
测量了真应力应变曲线。
The stress-stain curve shows the strain-hardening characteristic without initial shear stress.
当不存在初始剪应力时，应力–应变关系表现为硬化型曲线；
The stress-stain relation for homogeneous stage and inhomogeneous stage of deformation were obtained.
得到了均匀形变阶段和非均匀形变阶段的真应力应变关系。
Finally, the formulation of both modulus of elasticity and simplified stress-stain relationship curve on C45 fine aggregate concrete were proposed.
最后，提出了C45细石混凝土弹性模量和简化三直线混凝土应力-应变关系曲线的计算公式。
Establish finite element model, and use elastic - plastic mechanics to discuss stress-stain state of elastic and plastic deformation in cutting zone.
根据正交切削特点建立了有限元模型，应用弹塑性力学讨论了切削变形区的弹、塑性阶段的应力、应变状态。
The results indicate that the stress-stain curve of the honeycomb cardboard will first move up to the point of the unloading value with the secondary loading.
结果表明，二次加载时，蜂窝纸板的应力—应变曲线将首先上升到预压时的卸载点。
Material 's static toughness is the area of the stress-stain chart, which means the work absorbed before its break. It integrative reflects the strength and the ductility of the material.
材料的静力韧性是应力—应变图的面积，表示材料断裂前吸收的功，它综合反映了材料的强度和延性性能。
The main factors such as pressure, the third invariant of stress tensor, strain hardening and softening, stain rate and tensile damage have been taken into account in the constitutive model.
该本构模型全面考虑了压力、应力第三不变量、变形的硬化和软化、应变率强化以及拉伸损伤等各个影响因素。
The threshold stress and fracture stress of hydrogen-induced cracking of X80 pipeline steel are studied by constant load test and slow stain rate test.
采用恒载荷和慢应变速率动态拉伸实验方法，测定了X80管道钢在不同充氢条件下的氢致开裂门槛应力和断裂应力。
For rectangular columns sufficiently confined with external FRP, the improvement of ultimate stress and stain is related to the amount of FRP and the shape and characteristics of the cross-section.
混凝土矩形柱在FRP侧向强约束作用下，极限应力、极限应变的提高系数与FRP的包裹量及截面形状、特征有关。
We have studied the stress and stain distribution of lumbar using FEM.
应用有限元计算方法研究了腰椎段的应力应变分布规律。
We have studied the stress and stain distribution of lumbar using FEM.
应用有限元计算方法研究了腰椎段的应力应变分布规律。
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