The experimental results of stress relaxation and constant load tests in hydrogen charging condition prove that hydrogen has dual action of softening and hardening steel.
充氢条件下应力弛豫和恒载荷拉伸试验结果表明，氢有引起钢的软化和硬化的双重作用。
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 dilation and softening characteristics of natural expansive soil while shearing under low net mean stress and suction are mainly caused by the evolution of damage structure.
原状膨胀土在吸力和净围压较低时的剪胀和软化特性主要是由于结构损伤的演化引起。
Abstract: With the coal mine excavated deeper gradually, strain softening, swelling fracture and rheology of the rock appear around deep and high stress underground roadways.
摘要随着煤矿开采的逐渐加深，深部高应力巷道围岩表现出典型的应变软化、破裂膨胀及流变特征。
The stress - strain relationship of soil estabished from shear tests is distinguished into two kinds-progressive hardening type and post-peak softening type.
将土的剪切试验测得的应力-应变关系分成逐渐硬化类型和峰值后软化类型，提出了可以统一表示这两种类型应力-应变关系的表达式。
By which the solubilization of resin from wood, relax the stress of wood and softening wood have been realized. Therefore the qualified larch sliced microveneer could be obtained.
据此，可以达到溶出树脂、缓解应力、软化木材并制得合格的落叶松刨切薄木的目的。
It is found that the relationship between cutting stress and displacement can be divided into two types of gradually hardening and softening alter peak value.
由试验资料发现，剪切面上的剪切应力与剪切位移关系可分为逐渐硬化和峰值后软化两种类型。
Hardness can do 61 — 65hrc maturation process is: annealing, softening after casting machining, machining of air cooling after quenching and low temperature stress tempering.
硬度能做到61——65hrc成熟工艺是：铸造后软化退火，便于加工，加工后空冷淬火加低温去应力回火。
The model can reflect the softening characteristics and whole process of rock's deformation and failure, and the influences of surrounding stress on rock's strength.
该模型能反映岩石的软化特性及破坏的全过程，也能反映岩石强度受围压的影响。
When the dry density is relatively high, this dense specimen shows shear dilatation characteristics, and the effective principal stress ratio tends to be strain softening phenomenon.
干密度值较高时，土样处于密实状态，表现出剪胀特性，有效主应力比-应变曲线近于应变软化型；
Suggest the nonlinear elastic Constilutive model taking into the account of strain-softening, shear dilatancy(shrinkage)properties and stress path.
提出考虑土的应变软化、剪胀（剪缩）性和应力路径影响的非线性弹性模型。
The influences of softening modulus and elastic modulus on local damage variable rate depend on the flow stress level.
降模量及弹性模量对局部损伤变量率的影响取决于流动应力的大小。
As the rise of the strain rate, the feature of the true stress - true strain curve changed from "flat" to "serration", and the thermal deformation softening feature was reinforced.
随应变速率升高，真应力-真应变曲线特征从“平缓”型向“锯齿”型转变，材料热变形软化特征增强。
The model in this paper has few parameters and can reflect the aspects of load transfer function, such as hardening, softening and affects of confining stress.
模型具有参数较少且确定简单的特点，能反映荷载传递函数的性质，如硬化与软化，以及围压的影响。
The relationship between maximum local damage variable at the center of the band and flow tensile stress becomes flat as softening modulus increases or the elastic modulus decreases.
增加降模量或降低弹性模量，局部损伤变量最大值-流动应力的关系趋于平直。
The influence of softening extent on stress, displacement and the radius of plastic zone during expansion as well as the extreme expansion pressure are studied.
分析了剪胀和软化程度对球孔扩张时的应力、位移、塑性区半径及极限扩张压力等方面的影响，并将大、小应变理论的结果进行了比较。
When it was tensile failure, the curve of stress-strain relationship was softening and the reinforcement only increased the angle of internal friction of soil.
当发生拉断破坏时，其应力-应变曲线为软化型，此时加筋仅增加土体的粘聚力分量；
The stress level in elastic zone and the stress distribution in strain-softening zone are not affected by the pillar thickness. The former is related to the axial strain of the pillar.
矿柱弹性区的应力水平及软化区的应力分布不受矿柱宽度的影响，前者与矿柱的轴向应变有关。
Results show that the shape of shear stress-shear strain curves is hyperbolic; and no strain-softening phenomenon was observed in the tests.
分析结果表明：黏土—混凝土界面剪应力—剪切位移曲线仍大体呈双曲线形式，并未出现应变软化现象。
Finally, influences of constitutive parameters, such as elastic and softening moduli, and specimen length on complete stress-strain curve are investigated.
研究有关的本构参数(弹性模量及软化模量)及试样高度对全程应力—应变曲线的影响。
Saturated loess stress-strain curve has obvious nonlinear features, and more saturated as the softening of loess, loess saturated remodeling mostly stable and hardening;
饱和黄土的应力-应变曲线具有明显的非线性特性，且饱和原状黄土多为软化型，饱和重塑黄土多为稳定型和硬化型；
Considering the effect of heating rate and thermo-softening of material, the redistribution of macro-stress and deformation in structures and the possible heat inducing motion are discussed.
考虑材料的高温软化特征，研讨了温升速率对材料和结构的影响、结构热软化后的宏观受力和变形的重新分布以及可能的热运动。
Power law model can describe both strain-hardening and strain-softening behaviors, which can be used effectively to model stress-strain relationship of coarse-grained materials.
幂律模型既能反映硬化特性又能模拟双曲线模型不能反映的应变软化关系，因而能合理地反映粗粒料的应力应变关系。
Power law model can describe both strain-hardening and strain-softening behaviors, which can be used effectively to model stress-strain relationship of coarse-grained materials.
幂律模型既能反映硬化特性又能模拟双曲线模型不能反映的应变软化关系，因而能合理地反映粗粒料的应力应变关系。
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