比例极限

该系统配合材料试验机，在专用软件控制下，可以快速实时地测定材料的弹性模量E、比例极限σp、屈服极限σ（0.2）。

Under the control of special software , this system can be used with a testing machine to measure elastic modulus E , proportional limit σ _p , a yield limit σ _ ( 0.2 ) of matrals in a fast and timely way .

比例极限对数模型和球壳稳定系数

Proportional limit logarithmic model and stability coefficient of spherical shell

同时我们研究了随机游动和Lévy过程的α-过分函数和α-过分测度，并给出过程沿着矩母函数的次微分方向趋于α-不变Radon测度的一些比例极限定理。

Thirdly , we study the a-invariant Radon measures for random walks and Levy processes and give some nice ratio limit theorems that is relative to the a-invariant Radon measures .

拉伸载荷模量约等于比例极限内的弹性模量。

The tensile modulus approximately equal to the compressive modulus of elasticity within the proportional limit .

关于测定比例极限的试验研究

Test for measuring proportionality limit

单向拉伸试验中，在比例极限内，应力应变关系服从胡克定律。

In simple tension experiment , the stress-strain relationship submits Hook 's law within the limit of proportionality .

当应力超过比例极限后，采用了有效模量值。

In the theoreitical analysis , the effective modulus E was used for the stresses which exceed the proportional limit .

成果表明：试验所用的刚性混凝土弹模值较低，比例极限较高，峰值应变较大；

It was showed that the lower elastic modular of rigid concrete , the higher proportional limit and peak strain .

复合材料低的比例极限可由晶须端部应力集中所导致的低应力局部塑性变形来解释。

The low proportional limit may be explained by localized plastic deformation under low macroscopic stress caused by stress concentrations at the ends of SiC whiskers .

工程上很多结构如钢筋混凝土结构、应力超过比例极限后的钢结构，都具有非线性特性。

Most of engineering structures such as reinforced concrete structures , steel structures in which some stresses are beyond elastic limit , are possessed of nonlinear characteristics .

通过四点弯曲试验测定的材料的荷载-挠度曲线，研究了材料的抗弯比例极限强度、抗弯强度、抗弯弹性模量以及弯曲韧度指数。

Measured by four-point bending test material load-deflection curve , the proportion of the ultimate flexural strength , flexural strength , flexural elasticity modulus and flexural toughness index is studied .

试验研究表明，落叶松材在小于其比例极限应力的重复载荷作用下，经过3万次以上应力循环的蠕变经历，使其纤维方向弯曲弹性模量增大10%；

The results of experiments indicated that the elastic modulus , which parallel to the grain due to creep history at lower proportinal limit stress for 30 thousand times , increases by 10 % .

根据预压控制应力不大于比例极限，在设计荷载作用下预压钢管应力取值等于强度设计值的原则，确立了预压元件控制应力；

Forms control stress of pre-compression control stress according to principle of control stress value not to exceed proportion stress and pre-compression tube stress equal to the strength , on the basis of relative control condition .

正交异性板桥面绝大部分板件是通过焊接连接，由此产生的复杂的焊接残余应力降低了焊接部位材料的比例极限、抗疲劳、抗腐蚀等性能。

Most orthotropic steel bridge decks are connected by welding , this kind of connection lead to complex welding residual stress , which reduces the proportional limit of the material , weakened the materials ' anti-fatigue , anti-corrosion and other properties .

前者的弹性模量、峰值应变、比例极限与棱柱强度之比也较后者高，因此前者具有更高抗裂性。

Furthermore , the modulus of elasticity , the peak strain and the ratio of proportion limit and prism strength for the former are also higher than those for the latter . For this reason the former concrete has a higher crack resistance .

本文基于连续介质力学方法，对钢管混凝土进行弹塑性分析，导出了其比例极限、极限承载力的计算表达式和表观弹塑性本构方程。

Employing the continuum mechanics method , an elastoplastic analysis of the concrete filled steel tube is carried out in the paper , from which the theoretical formulations of the proportional limit and the ultimate strength as well as the apparent constitutive equation are derived .

在攻击能力受限安全邻近距离严格情况下，路由表恶意节点比例有极限值。

When the capacity of attacker is restricted , there is extreme value for fraction of malicious node on routing table .

计算结果表明，在纳米级MOS器件中，采用SiO2作栅介质时，1.5nm厚度是按比例缩小的极限。

It is shown that the oxide of nano-MOST can be scaled down to 1.5 nm .

应变硅技术由于其对载流子迁移率的提高作用，弥补了等比例缩小技术的极限问题，在业界得到了重视，并作为一项新技术应用于超深亚微米工艺中。

Strained-Si technology can enhance the mobility of carrier , which fetches up the limitation problem of reduced proportional technology . It has been given high priority and used in UDSM technology as a new technique .