结果表明,钽的流动应力对温度和应变率的变化相当敏感。
The results showed that the flow stress of tantalum was very sensitive to the changes of temperature and strain rate.
尤其对于大陆岩石圈,地壳厚度、年龄和应变率均可显著影响岩石圈的强度。
Particularly, for the continent, the crust thickness, thermal age and strain rate significantly had strong effect on the lithosphere strength.
发现纳米管的压缩强度,如临界轴向内力在低温下受温度影响明显,并且和应变率的大小有关。
It was revealed that the compressive strength of nanotubes, such as the critical axial load, is related to applied strain rate and also affected by temperature especially by lower temperature.
锯齿形切屑产生的原因是第一变形区内因热软化超过应变和应变率强化而发生了绝热剪切局部化。
The reason for the sawtooth chips is that the adiabatic shear localization occurs in the primary deformation zones when thermal softening exceeds strain and strain rate hardening.
目的:应用应变和应变率显像技术对正常人和原发性高血压患者颈总动脉壁顺应性特点进行研究。
Objective: To assess the compliant properties of the Common Carotid Artery (CCA) in healthy subjects and patients with essential hypertension based on strain-strain rate imaging.
用12个区域来测量收缩期圆周应变时间和应变率,并用应不峰值时间和应不率的标准差来表示心肌不同步。
Time to peak systolic circumferential strain and strain rate were measured in 12 segments, and myocardial dyssynchrony was expressed as the SD of time to peak strain and strain rate.
这个曲线和其他学者所做试验得到的最大抗压强度和应变率的关系曲线变化趋势相吻合,说明此公式的正确性。
This curve and other scholars have made the biggest test compressive strength and strain-rate trends in the relationship between the curves match that this formula is correct.
在高应变率下,断裂应变能密度主要由初始弹性模量和失稳应变共同决定,受温度效应和应变率效应的综合影响。
The fracture strain energy density at the high strain rate is mainly determined by the initial elastic modulus and the unstable strain and affected by the temperature and the strain rate.
目的探讨室壁与入射超声之间的夹角及应变长度(SL)对长轴方向应变成像(SI)和应变率成像(SRI)的影响。
Objective To study the influence of incidence angle of ultrasound and strain length(SL) on strain imaging(SI) and strain rate imaging(SRI) in long-axis direction.
塑性拘束较大的直缺口试样(i)的整体屈服载荷及缺口前的应力、应变和应变率比塑性拘束较小的V缺口试样(V)大。
The general yield load, stress and strain rate ahead of notches of I specimens with larger plastic constraint is larger than that of V specimens with small plastic constraint.
基于混凝土损伤理论,在试验得到的应力—应变曲线的基础上,分析了纤维含量和应变率对材料强度及材料力学行为的影响。
Based on damage theory, the stress-strain curve got from experiment is analyzed in order to study the effect of material strength and mechanical properties by fiber content.
稳定蠕变应变率本构方程是作用在盐岩上的应力偏量的幂次函数和能量与温度的指数函数。
The steady-state creep strain rate is a power function of deviatoric stress and exponential function of temperature and energy.
本文借助分子动力学模拟研究了极高应变率下固体铜和液体铜由平面冲击导致的断裂。
MD simulations are carried out to study spallation in solid and liquid copper incuded by planar shock loading at exteme strain rates.
分析了应变率对混凝土弹性模量、峰值应力时的应变、泊松比和混凝土吸能能力的影响。
The relationships between strain rate and the elastic modulus, critical strain, Poisson's ratio and energy absorption capacity of concrete are still studied.
对6063铝合金试样在不同应力三轴度和不同应变率下进行拉伸试验,得到了该合金在这两种情况下的力学性能。
The specimens of 6063 aluminum alloy are tensioned under different stress triaxiality and different strain rates, the mechanical properties of 6063 aluminum alloy can be drawn.
本文重点针对传统的SHPB实验技术试样中早期应力不平衡和实验中难以达到常应变率加载这两大问题,建立了入射波整形技术。
Because it is hard to obtain dynamic stress equilibrium and constant strain rate in soft materials specimen during the conventional SHPB experiments, a pulse shaping technique is developed.
稳定蠕变应变率本构方程是作用在盐岩上的应力偏量的幂次函数和能量与温度的指数函数。
The steady state creep strain rate is a power function of deviatoric stress and exponential function of temperature and energy.
最后以中国川滇地区为例,利用GPS观测资料计算了地应变率场,并对计算方法和结果进行了分析讨论。
Finally, with Chinese Sichuan-Yunnan area as an example, the strain rate is calculated by GPS data and some discussions of computation methods and results are made.
高应变率下岩石的动态本构关系和力学特性,目前主要是利用SHPB装置等来获得。
Split Hopkinson Pressure Bar (SHPB) has been used to study the constitutive and mechanical properties of rocks under high strain rates.
本文也指出了由于应变率敏感性所引起的内耗增量和过应力的类比性。
The analogy between internal friction increment and overstress due to strain-rate sensitivity is clarified.
应变率敏感系数是宏观塑性动力学和位错动力学的一个基本概念,本文试图对其进行了重新解释。
An attempt is made to elaborate the definition of the coefficient of strain-rate sensitivity, which is a fundamental concept for macroscopic dynamic plasticity and dislocation dynamics.
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 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.
研究了AZ 91d镁合金在应变诱发熔化激活法处理过程中形变率和形变温度对组织的影响。
The influences of strain and temperature on microstructure of AZ91D alloy for upsetting in the strain-induced melt activation process were investigated.
揭示了半固态金属成形过程中应变率和变形量对液相偏析影响的规律。
The effects of strain rate and engineering strain on liquid phase segregation in the process of semi-solid metal forming have been revealed in this paper.
在SHPB实验中,通过采用整形器技术,实现实验过程中的应力平衡和常应变率加载。
A pulse shaping technique has been used in split Hopkinson bar (SHPB) experiment, for ensuring the specimen in dynamic stress equilibrium and loaded under constant strain rate during the test.
分析温度、应力(应变)和慢应变率等因素对极化曲线的影响,并讨论温度、应力和慢应变率对管道钢发生应力腐蚀开裂的驱动作用。
Effects of temperatures, stresses and slow strain rates on the polarization curves and the contributions of these factors to stress corrosion cracking (SCC) were also analyzed.
比较了应变率负反馈和应变正反馈控制律的控制效果。
And the effects under the control laws of negative strain rate feedback and positive strain feedback are compared.
作为实例,我们定量分析了扩张和收缩管中的剪应变率分布。
As a practical application, the strain rate analyses of flow in a diverging vessel and a converging vessel have been made at the end of this paper.
泡孔尺寸不仅影响着材料的屈服强度和塑性模量等,还影响着材料的应变率敏感性。
Cell-size has a significant effect not only on the crushing stress and plastic modulus of aluminum foam, but also on the strain-rate sensitivity of material of this kind.
由该模型得到了利用纤维束冲击拉伸试验确定单丝应变率相关的统计本构方程中力学参量的原理和方法。
The method to determine the mechanical parameters in the constitutive equations of the rate-sensitive fiber by the tensile impact test of the fiber bundle are proposed from such models.
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