The strength degradation ratio and strain energy loss were selected as damage indexes to analyze the deterioration law of the mechanical properties of concrete in different co. 采用强度退化率和应变能损失率为损伤指标,对不同腐蚀程度混凝土力学性能的退化进行分析。
Besides, in the position of larger value stress the local strain is smaller that coincide with the law of stress and strain change during the common forging process. 其次,应力值较大的地方应变值较小,符合锻造过程中的应力应变变化规律。
At the same tensile strain, the power law relationship between band propagating velocity and applied strain rate is also obtained. 得到了在相同应变下,变形带的传播速率和加载应变速率之间的幂律关系。
By the planar strain modelling of expansive rock tunnel, the appearance law and controlling measure of underground expansive pressure being found out. 通过膨胀性围岩巷道的平面应变模拟,了解到膨胀地压的显现规律及控制措施。
( 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 results show that the fatigue crack closure in the plastic zone in the high strain region is more evident than in the normal stress region. The fatigue crack growth rate in both high strain and normal stress regions can be calculated by Paris law with modified by U. 结果表明:高应变塑性区的存在对疲劳裂纹扩展有较大延缓作用,疲劳裂纹扩展速率可用经U修整后的δ和Paris公式表示,结果与标准试样的结果较为吻合。
A study on the strain fatigue behavior and the evolutive law of damage in wheel steel 车轮应变疲劳性能及损伤演变规律研究
The stress and strain fields at crack tip possess the same power law singularity under linear-hardening condition. And the singularity exponent is uniquely determined by the viscosity coefficient of the material. 在线性硬化条件下,裂纹尖端的应力和应变场具有相同的幂奇异性,奇异性指数由材料的粘性系数唯一确定。
Using the finite element method to simulate the stress and strain status and the deformation process of tooth profile of plastic helical gear under the environmental temperature of 100 ℃ and thus obtained the variation law of the engagement of plastic helical gear. 运用有限元方法,模拟齿轮在100℃环境温度下的应力应变状态与塑料斜齿轮齿廓变形过程,从而得出了塑料斜齿轮啮合的变化规律。
The large elastoplastic deflection analysis in the pinch-type four-roll plate bending process is developed in [ 1] for a plane strain plate strip made of ideally plastic materials, and generalized in this paper to the materials of general strain hardening law. 本文将[1]的工作,理想塑性材料平面应变薄板的夹持型连续滚弯成形过程的弹塑性大变形弯曲的力学分析,推广至一般应变硬化材料的情形。
There are the same variance tendency between permeability-lateral strain curve and permeability-axial strain curve. However, the lateral deformation of rock can reflect more sensitively the evolution law of permeability than the axial deformation. 渗透率-环向应变曲线与渗透率-轴向应变曲线有相同的变化趋势,但岩石环向变形比轴向变形更能灵敏地反映渗透率的演化规律;
The calculation results indicate that under the two states of plane strain and plan stress, the J-integral values at three different locations of welded joints are different from those of all base material and all weld material. But there is a certain law. 计算结果表明,在平面应变和平面应力两种状态下,焊接接头三个不同裂纹位置的J积分值与全母材和全焊缝材料的J积分值均不相同,但具有一定的规律性;
According to the strain test result of the soil anchor, in this paper, the law of anchorage stress distribution in different soil have been analyzed, and the problem of prestressing force level is discussed on the basis of building computational model. 通过分析土层锚杆锚固段应变分布测试结果,对不同土层中锚杆锚固段应力分布规律进行了研究,并在建立计算模型的基础上,对锚杆预应力水平进行了探讨。
The solution of the crack-tip stress, strain fields for the power law type nonlinear viscoelastic materials, especially for the modified polypropylene, is obtained. 得到了幂率型非线性粘弹性材料,特别是改性聚丙稀的裂纹尖端应力、应变和位移场的解答。
It is presumed that both the stress and strain possess the power law singularity, then the stress and strain fields are investigated asymptotically at a steadily propagating crack-tip. 假定应力和应变都具有相同的幂奇异性,对定常扩展裂纹尖端的应力和应变场进行了渐近分析。
Therefore it is important for theoretical meaning and practical value to study mechanic behaviors related with time, temperature and strain rate in the processing of deformation and fracture, and the development law of craze and the mechanism of material fracture. Since Sauer and Hsiao etc. 研究高聚物变形和断裂过程中与时间、温度和应变率相关的力学行为及银纹的扩展规律和材料断裂机理,具有重要的理论意义和应用价值。
The deformation mechanism directly determines the corresponding stress strain curve: the curve is linear in elastic period which coincides with the Huke Law; 这种微观变形机制直接决定了相应的应力应变关系:在弹性变形阶段,虎克定律依然成立;
First, the relationship between the measured potential on the PVDF film and the strain components on the structural surface was deduced from the piezoelectric constitutive law under the non-contact condition. Then calibrating experiments of the PVDF film are carried out. 首先,根据压电方程推导了在非接触测量方式下,电压表测量电压和结构表面应变分量之间的关系式,并对购置的PVDF压电薄膜进行了标定实验。
Using this new definition we deduce the transformation formulas for the rotation of coordinate axes, erect the strain tensor and verify the Hooke's law for shearing. 文中还利用新的角应变定义证明了转轴公式,组成了应变张量和证明了剪切虎克定律。
With the FEM simulation, the strain and stress of each node under different deformation stage are analyzed and the common forming law of this ring shell container is obtained. 采用有限元数值模拟对环壳零件成形过程中不同压下量下毛坯各节点的应力应变分布及变化规律进行了分析,获得了环壳零件冲压过程的成形规律。
In the process of deep-drawn strain test for CR 304 stainless steel plates, the strain distribution law in each area of the deep-drawn parts, the martensitic transformation analysis, wall thickness and history of hardness change are carefully studied through using martensitic transformation analysis method. 应用马氏体转变分析方法,对304不锈钢冷轧板拉深应变试验过程中拉深件各个区域的应变分布规律、马氏体转变分析、壁厚、硬度变化历史进行了研究;
To study the influence of the elastic strain field due to different edge dislocation group on solute precipitation. Revealed the morphology characteristic and the diffusion law of the solute precipitation reasonably. 本文建立了浓度场与弹性应变场相互作用的自由能函数,用于研究位错不同组态的应力场对溶质析出的影响,合理地揭示了溶质析出的形貌特征及扩散规律。
At the same time, through statistical methods, continuous damage theory and Lemaitre strain equivalence hypothesis, damages constitutive model of rock in saturated-dry cycle was established based on Mohr-Coulomb strength criterion and the hooker law. 同时,利用统计方法、连续损伤理论和Lemaitre应变等效假说,基于Mohr-Coulomb强度准则和胡克定律,建立了饱和风干循环过程下的岩石损伤统计本构模型。
Marxist view of religion is the a strain of the theoretical system, it has rich content, including the basic points such as the Marxist essence of religion, the development law of religion, the social function of religion and the religious attitude of Marxist political parties. 马克思主义宗教观是一脉相承的理论体系,它有着丰富的内涵,包括马克思主义者关于宗教的本质,宗教的发展规律,宗教的社会功能以及马克思主义政党对待宗教的态度等基本观点。
Analysis of the deformation temperature and strain rate and other parameters on the high-temperature flow stress and lamellar spheroidization process of the evolution of the impact of the law. 分析了变形温度和应变速率等参数对高温流变应力和片层组织球化过程演变的影响规律。
Taking the pressure cell on the pile and surface strain cell to measure pile counterforce, the variation law will be summarized. 采用桩顶压力盒和表面应变计测试桩项反力,分析其变化规律。