The triaxial shear test of the original loess is carried out and the ct scanning is ongoing at the same time . combining images and data of the ct scanning with the stress - strain curve , the course of soften dehiscence damage and harden yield damage is explained by means of damage theory 进行了原状黄土的三轴剪切试验过程中的ct扫描，结合ct图像、数据与应力应变曲线，利用损伤理论方法解释了软化开裂破坏和硬化屈服破坏过程。
( 2 ) a statistical damage constitutive model is used to explore the feature that the stress - strain curve of damage rock curls upward when the loaded stress is little . and the mixture method is used to realize the coupling of rock without damage , damage and fluid ( 2 )探讨了用损伤统计本构模型模拟应力应变曲线第一阶段稍向上弯曲特征建模问题，采用混合物理论探讨了非损伤岩石、损伤和液相的耦合问题和模拟应力应变曲线第一阶段稍向上弯曲特征建模问题。
The existed material fatigue performance test curves are dealt with and analyzed , and the non - dimensional stress - strain curve , tangent modulus factor curve and fatigue life curve are drawn based on the experiment data , and these three non - dimensional parameter curves are used to find the inherent rules that the test curves can be replaced each other to some extent . it can be concluded that if the common character and system error of these materials are found , the test curve of a certain material can be used for reference by another material . this is a simple approach about fatigue life estimate and is engineering practical 对已有的材料力学疲劳性能试验曲线进行分析整理，利用试验数据绘制了相对应力应变曲线、切线模量因子曲线和疲劳寿命曲线，利用这三种无量纲参数曲线发现了其中存在的规律性，即在某种程度上实验曲线可以互相取代，并用试验数据对此进行了讨论，并由此推断，如果找出材料彼此的共性或彼此之间的系统误差就可以将一种材料的试验曲线供其它材料参考使用，这是一种估算材料的疲劳寿命的简便方法，对工程而言具有实用性。
The elastic solution for elastic - plastic problem is based on model theory of elastic - plasticity and deformation theory of plasticity . with the original data which embodies the stress state of complicated structure at elastic phase and is attained by experiment or calculation , according to the similarity theory between elasticity and plasticity and generalized stress - strain material curves , and using new means and new techniques , this method and change the elastic value into plastic value correspondingly 结构弹塑性分析的弹性解法是以弹塑性力学的模型理论和塑性力学形变理论为基础的，具体做法是利用实际工程中由实验或者计算等方法获得表征复杂结构弹性阶段应力状态的原始数据，根据弹性力学和塑性力学方程的相似关系和被实验材料的广义应力应变曲线，采用新的分析方法和实验手段，将弹性解转换成对应的弹塑性解。
The technique that used to measure the mechanical properties for mems is different from the traditional one considering the size scale . a uniaxial tension test system for test the mechanical property of mems materials is presented in this thesis . the strain is measured by interference strain / displacement gauge ( isdg ) 本文介绍了新近研制的用于测量微电子机械系统mems材料的机械性能的单轴拉伸试验系统，采用激光干涉技术测量试样应变，得到材料从开始变形直至破坏的全历程应力应变曲线。
The approximate polynomial method was based on neuber ' s method , the cyclic stress - strain responses and neuber ' s rule were treated as probabilistic curves , and the statistic characteristic was obtained from the approximate polynomial . the method is fast and easy for engineering application 近似的多项式拟合法在诺伯法的基础上，将循环应力应变曲线和诺伯双曲线视为概率曲线，通过建立近似多项式的方法，求得局部应力应变的统计特性，快速简便，适合工程应用。
The paper studied controlling rotor vibration with the super - elasticity of sma and sfd , set up the new equation of sys tern vibration according to the stress - strain curve of sma in super - elasticity state , used the nonlinear theory and the dynamic stability theory to study the vibration of rotor controlled by sma , discussed the stability condition of the system , obtained the relationship of system parameters when bifurcation was appeared , supposed a method that improves the stability of rotor system and restrains vibration amplitude though changing parameters , and finally validated the effect of restraining vibration of the improved system through emulation 摘要研究利用形状记忆合金的超弹性和挤压油膜阻尼器控制转子振动，利用形状记忆合金在超弹性状态下的应力应变曲线，建立了新的系统振动方程，运用非线性理论和运动稳定性理论研究转子在形状记忆合金控制下的振动状态，讨论了系统的稳定性条件，获得系统发生分岔时系统参数之间的关系；并提出了通过改变参数来提高系统稳定性和抑制振幅的方法，最后通过仿真验证了改进后的系统振动抑制效果。
The influence of skeleton curve and hysteretic curve on the simulate curves are analyzed . the paper chooses seven representatively models from lots of confinement models , and some different hysteretic rules are added to them . by dint of the program based on the column - beam element of the fiber model , material bank of the program established 利用此程序作为有力工具，以大量低周反复荷载下压弯试件的试验结果为标准，通过对试验结果的计算机模拟分析，比较了各模型中骨架曲线及滞回规则的模拟效果，分析了材料应力应变曲线与构件力位移模拟曲线间的联系以及影响这一联系的因素。
Applied the above theory and the dem program trubal , the unilateral compress problems for the regular generated particles with an interstitial fluid are studied , and the macro - strain - stress curves varied with the fluid properties and the velocity of the wall are gotten . then , he unilateral compress problems for the random generated particles are numerically simulated , and the macro - strain - stress curves are obtained . moreover , the numerical simulation results for the dry and moist cases are compared 利用上述理论以及demtrubal程序，研究了存在填隙流体时颗粒规则排列单向压缩问题，得到了宏观应力应变曲线随流体性质、壁的运动速度等的变化规律；并对随机排列单向压缩问题进行了数值模拟，得到了宏观应力应变平均曲线；并对干、湿两种情况下颗粒的模拟结果进行了对比。
After confirming the mix property of rpc , the 28 groups of cubes ( 70 . 7mm ) the 48 groups cube ( 100mm ) and the 6 groups of prism specimens were carried out to study rpc200 strength standard , discuss the relationship between the mechanical properties ( peak strain 、 young ' s modulus and poission ' s ration ) and prismatic strength , and establish the stress - strain curve for rpc200 在确定rpc配合比后，本文进行了28组边长70 . 7mm立方体试件、 48组边长100mm立方体试件和6组100mm 100mm 300mm棱柱体试件的力学性能试验，研究了rpc200的强度标准，探讨rpc200的基本力学指标（峰值应变、弹性模量、横向变形系数等）与棱柱体抗压强度之间的关系，建立了rpc200应力应变曲线上升段方程。
