1) brittle or quasi-brittle materials
脆性或准脆性材料
1.
Due to the existence of various micro-defects in brittle or quasi-brittle materials, the mechanical behavior, such as the nominal failure stress, stiffness and fracture toughness etc.
由于脆性或准脆性材料内各类微缺陷的影响，材料的力学性能，如名义破坏应力， 刚度以及断裂韧性等随试件的大小而改变，具有明显的尺寸效应。
2) quasi-brittle material
准脆性材料
1.
To determine the underlying probabilistic distributions of the physical and mechanical property parameters of the mesoscopic representative volume element(RVE) and to form the probabilistic volume element(PVE) models,it is a quintessential problem in the elastic damage analysis of quasi-brittle materials by means of the damage micromechanics.
确定材料细观单元的材料物理力学性能的概率分布,以形成细观概率体元,是对岩石、混凝土等准脆性材料进行弹性损伤模拟分析的基础,也是基于弹性损伤模型的有限元岩石破裂过程分析系统为材料非均匀赋值的依据。
2.
The damage process is accompanied by the acoustic emission(AE)for quasi-brittle materials such as rocks,concretes,ceramics and so on.
利用累积声发射数与损伤变量一致的观点,建立准脆性材料声发射的损伤模型,得到声发射率和Kaiser效应的一般表达式,并给出恒位移速率和恒荷载速率加载方式下声发射率与时间的解析关系。
3.
The study of the instability of quasi-brittle materials under the action of a non-stiff loading system is helpful to forecast the unstable failure of materials or structures and to extrapolate the intensity of catastrophic failures.
岩石等准脆性材料在非刚性加载条件下的非稳定问题研究,有助于预报材料或结构的失稳破坏、推断灾害等突变现象的剧烈程度。
3) quasi-brittle materials
准脆性材料
1.
This paper expounds the present situation of fractal geometry used in fracture performance of quasi-brittle materials,provides some ordinary analyzing methods,and analyzes the quantitative relations among fracture toughness,fracture energy of concrete,and the dimension of fracture surface.
阐述了分形几何学在准脆性材料断裂方面应用的现状,给出了常用的分析方法,分析了混凝土断裂韧性以及断裂能与分形维数之间的定量关系。
2.
By comparison with elasto-plastic materials, some problems in the programming for strain-softening analysis of quasi-brittle materials are studied.
通过与通常弹塑性材料比较,论述了用于分析准脆性材料应变软化问题计算程序设计中的几个主要问题,其中包括原理和方法、增量迭代过程和减少计算误差的措施等。
3.
Based on this criterion, a new method of concurrently measuring the two material parameters of quasi-brittle materials using three-point bending U-notched beams is proposed.
因此,只要在实验时,制作一系列切槽深度相等而根部曲率半径不同的待测准脆性材料的U形切槽梁,用三点弯曲加载并分别测得其临界荷载,在已知应力集中系数的情况下,应用平均应力破坏准则就得到一超定方程组,再用恰当的数值方法便可解出拉伸强度和断裂韧度两个未知数。
4) quasi brittle material
准脆性材料
1.
A micro mechanical damage evolution model with the crack size effect was proposed for quasi brittle materials.
提出了含三相正交分布等尺寸微裂纹的准脆性材料稳定扩展的细观损伤演化模型。
5) Brittle materials
脆性材料
1.
Study of Grinding Cracks and the flexural strength of Ground Brittle Materials;
脆性材料磨削加工损伤及工件强度研究
2.
Influence of stress ratio on fracture behavior of brittle materials and testification of strain criterion of fracture;
应力比对脆性材料断裂影响及应变断裂准则验证
3.
Numerical simulation to resistance characteristic of brittle materials under biaxials stress;
脆性材料在双向应力下阻力特性数值模拟
6) brittle material
脆性材料
1.
Study on cumulative failure probability of brittle material;
用Weibull理论研究脆性材料的损伤概率
2.
Diamond cutting of optical brittle materials;
光学脆性材料的金刚石切削加工
3.
Hypothesis of interior stress and size effect of mechanical parameters of brittle materials (II);
内应力假说和脆性材料特性参数的尺寸效应(Ⅱ)
补充资料：脆性
分子式：
CAS号：
性质： 材料在外力作用下(如拉伸、冲击等)仅产生很小的变形即断裂破坏的性质。聚合物脆性与聚合物结构及使用条件(温度、外力作用速率等)有关，柔性链高分子聚合物脆性小，韧性好；刚性链高分子则相反。常用冲击强度或断裂伸长表征聚合物的脆性。
CAS号：
性质： 材料在外力作用下(如拉伸、冲击等)仅产生很小的变形即断裂破坏的性质。聚合物脆性与聚合物结构及使用条件(温度、外力作用速率等)有关，柔性链高分子聚合物脆性小，韧性好；刚性链高分子则相反。常用冲击强度或断裂伸长表征聚合物的脆性。
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条