材料脆性

建议了一个可以描述材料脆性变化的脆性指数B，并验证了B指标能较好地描述岩土材料在加卸荷时的脆性变化。

In the paper a brittleness index B is proposed and used to describe the brittleness variety of geomaterials under loading or unloading conditions .

简单分析了中厚壁钢管产生DWTT无效试样的原因是材料脆性增加和试样V形缺口。

Causes of DWTT specimen failure for medium thickness pipe are material brittleness addition and V-shape nick .

在实际应用中通过经验观察，以M2钢滑块在相互碰撞时更易发生棱边崩脆现象来判定其渗层的脆性，结果表明，新材料脆性更低。

Experience observation show that slip-piece of M2 steel is easier fragile in the interactional collision , therefore the GDL-4 has more lower brittleness .

本文介绍一种利用Link－OPAL系统电子背散射衍射（EBSD）技术对多晶体材料脆性解理刻面晶体学位向测定的方法。

The method using electron backscatter diffraction ( EBSD ) in Link OPAL system was developed to determine the orientation of cleavage facets in polycrystalline materials in this paper .

针对植物纤维/聚丙烯复合材料脆性大的问题，选用三元乙丙橡胶（EPDM）及乙烯辛烯共聚物（POE）对复合材料进行增韧研究。

Because of the problem of great brittleness of natural fiber / polypropylene composites , EPDM ( ethylene-propylene-dieneterpolymer ) or POE ( ethylene-1-octene copolymer ) was chosen to modify the toughness properties of the composites .

分析转子金属材料脆性转变温度（FATT）对冲击韧性的影响，提出为延长汽轮机转子寿命对汽轮机启动和超速试验的要求。

It analyses the influence about fracture appearance transition temperature of rotor metal material to impact toughness , and puts forward the demand to turbine star-up and over-speed experimentation aimed at extending turbine rotor life-span .

基于Bazant尺寸效应律，强度与试件尺寸双对数曲线图中两条渐近线的交点或与之相关的有效断裂过程区长度可反映材料脆性。

Based on size effect law proposed by Bazant , the intersection point of the asymptote of size effect curve and the fracture process zone length are suggested to reflect the brittleness of materials .

断裂性能和材料脆性。

Fracture properties and material brittleness .

σ相的析出使材料脆性变大，高温蠕变强度和耐蚀性能下降。

The σ phase caused the material brittleness to increase , while the creep strength and corrosion resistance decrease .

它的出现为解决陶瓷材料脆性问题提供了新思路。

The coming out of nano ceramics provides a new idea for the solution to the brittleness of ceramics .

综述和简要评价了晶界偏聚和材料脆性断裂之间关系的理论研究进展情况。

An overview of the recent progress in the theoretical study of relationship between grain-boundary segregation and brittle fracture is provided .

陶瓷材料脆性较大，在许多临床条件下必须要依靠树脂粘接才能使全瓷修复体与基牙支持组织牢固地结合，从而使得修复体长期耐用。

The inherent brittleness of some ceramic materials and certain clinical situations require resin bonding of the completed ceramic restoration to the supporting tooth structures for long-term clinical success .

围岩的切向应力梯度随着材料脆性指数的增加而增大，厚壁圆筒临近整体破坏时，最大切向应力位于距筒壁内表面一定深度处。

Gradient of tangential stress increases along with the increase of brittle index of rocks , and the maximal tangential stress occures at some distance from the inner surface of the cylinder .

基于强度尺寸效应，可得出&与试件几何形式无关的材料脆性指标。该指标真实可靠，测定简单方便。

Based on size effect of strength , the brittleness indexes , which can be obtained easily and are independent of size of the sample , can be reliable and have a great applied prospect .

因此，Bayesian神经网络能较准确地用来预测转子钢材料的脆性转变温度。

Thus the fracture appearance transition temperature of rotor steel can be predicted more accurately by means of Bayesian neural networks .

作者根据对断裂过程的观察和断裂试样断口的分析结罘，讨论了WC系钢结硬质合金断裂的微观机制，并提出了提高材料抗脆性断裂能力和防止早期破裂的途径。

The micro-fractural mechanism of WC base steel-bonded carbide has been discussed and the wags for improving fragile resistance and preventing premature break .

但PHBV材料的脆性又限制了其实际应用。

However , the brittleness of PHBV limits its application .

本文首先将最小耗能原理应用于线弹性材料的脆性损伤问题，建立了基于应变等效和余应变能等效两种损伤力学基本假定下各向同性材料的脆性损伤模型A和B；

First , the principle of minimum dissipative energy has been applied on brittle damage problem of linear elastic material . Based on " hypothesis of strain equivalence " and " hypothesis of complementary energy equivalence ", two brittle damage models A and B of isotropy material have been established .

评定结构材料临界脆性温度的新方法简介

Brief Introduction of New Methods for Structure Materials Critical Brittle Temperature Evaluation

改善陶瓷材料的脆性是陶瓷研究领域里急待解决的关键性课题。

It is the important task to improve the toughness of the ceramic material .

铸铁材料的脆性断裂的分析

Analysis of Brittle Fracture in Gray Cast Iron

对岩土材料的脆性破坏过程进行正确描述是很困难的。

How to describe the brittle failure process for geomaterials is a challenging problem .

非晶态磁头材料的脆性研究

Brittleness Investigation on Amorphous Magnetic Head Materials

砌体结构由于其材料的脆性性质，抗震性能较差。

Due to the brittle materials , masonry structure has a poor performance in earthquake .

砂带磨削仿真模型考虑了磨粒形状、硬脆材料的脆性断裂特点和工作台运动形式等因素。

Were considered in simulation models .

岩土材料的脆性研究

Study on Brittleness of geomaterials

松籽壳材料为脆性，抗压强度大于抗拉强度，拉、压加载时的P-图服从虎克定律。

The pineal shell is a brittle material , its compressive strength is greater than the tensive strength .

介绍汽轮机高中压转子金属材料的脆性转变特性。

The paper Introduces fracture appearance transition character of turbine high and middle pressure rotor made metal material .

传统高强素混凝土材料的脆性大、抗冲击性差是影响其实际应用的一个重要因素。

Plain concrete has high brittleness and low shock resistance , so it has difficulty in widespread availability .

复合材料的脆性软化是影响其结构变形稳定性的重要因素之一。

Brittle softening is one of the important factors which affects the deformation stability of the composite structures .