An acidic chemical reaction is produced which turns the paper brittle and discolored.
会出现一种酸性化学反应。这种反应会使纸变脆和褪色。
The paper discusses over the influence exerted by welding residual stress on the static strength, brittle fracture and stress-corrosion cracking of metal structure.
本文介绍了焊接残余应力对金属结构的静强度、脆性断裂以及应力腐蚀开裂的影响。
Fracture mechanism, initiation and propagation of cracks, and the control method of cracks in rock like brittle material under dynamic load are described in this paper.
本文主要论述了动荷载作用下岩石等脆性材料的断裂破坏机理、裂纹形成与扩展以及裂纹的止裂与控制等内容。
In this paper, the experimental investigation is made on the grinding of single brittle materials.
对单晶硅脆性材料的超精密磨削加工作了大量的实验研究。
In this paper, Based on the theory analysis and test, the fracture mechanism and fracture direction of brittle materials are studied.
本文主要通过理论分析和试验，对脆性材料的断裂机理及断裂方向进行研究。
This paper presents a theoretical analysis about the propagation rule of the micro-crack in brittle materials under axial compression, based on the energy release rate criterion.
本文利用混合型裂纹扩展的能量释放率理论对脆性材料受轴向压缩时其内部微观裂纹的扩展规律进行了研究。
The effects of water temperature, dynamic vacuum treatment and ultrasonic treatment on desulphurization technique of candied brittle plum processing were investigated in this paper.
文中研究了水温、真空动态处理、超声波处理在脆梅加工脱硫工艺中的应用效果。
This paper deals with some results of experimental study on semi-brittle behavior of rocks at the conditions relevant to the middle-lower crust.
本文着重介绍了在中下地壳温度、压力条件下进行的几种岩石半脆性蠕变的实验研究结果。
The paper analyzed the critical failure action and brittle rock with a penetration and reestablishment group theory. The critical failure rate of the rock was obtained.
利用逾渗和重整化群理论初步分析了脆性岩石的临界损伤破坏行为，指示性地得出了岩石的临界破坏概率。
In this paper, the typical 6 kinds of optical glasses have been grinding by the ultra-precision grinding, brittle-ductile transition's critical depth of brittle materials is researched theoretically.
利用超精密磨床磨削加工6种典型的光学玻璃，先从理论上研究了脆性材料脆塑转变的临界值。
A yellow brittle small pieces of paper, an old photograph, a permeability of the veins bookmarks, the changes in time, to become debris.
一页发黄变脆的小纸片，一张老照片，一片通透的叶脉书签，都在时光的变幻中，成了残骸。
The paper disclosed first a ductile to brittle fracture transition of PVC caused by increasing loading rate at several constant temperatures.
展示了聚氯乙烯（PVC）在不同温度下由试验速率增加而引起的韧脆性转化。
According to fracture mechanics concepts, the essence of paper brittleness has been approached in this paper. Brittle constant-B is introduced to evaluate paper brittleness.
本文从断裂力学的角度探讨了纸张发脆的本质，提出了用脆性常数B来反映纸张脆性的大小。
This paper proposes the analytical method for fracture mode and design method for prevention of brittle fracture at low temperature.
提出了钢结构断裂模式的分析方法和钢结构低温脆断设计方法。
This paper studies the hydration sloughing mechanism of three kinds of hard and brittle shales of Shahejie formation in Gangdong oilfield.
研究了大港油田港东地区沙河街地层三种硬脆性泥页岩的水化坍塌机理。
This paper studies the ultra-precision machining mechanism of the brittle crystal materials by carrying out single diamond turning experiment.
用单刃金刚石车削试验研究超精密加工脆性晶体材料的机理。
Based on the failure analysis of reinforced concrete and the fracture behavior of concrete as a type of quasi-brittle materials, a model of matrix crack with bridging bar is proposed in this paper.
基于钢筋混凝土的破坏分析，结合混凝土类准脆性材料的断裂特性，本文提出了强化筋桥联基体裂纹力学分析模型，在该虚拟裂纹端部存在粘聚力分布，而强化筋在桥联裂纹处具有与基体脱离的部分段。
This paper analyzes and compares the ends of the brittle delay fracture and hydrogen brittleness of Austenitic alloy, and reveals their difference and relation.
通过对奥氏体合金脆性延迟断裂和氢脆断口的分析和比较，揭示了它们之间的区别和联系，提出了奥氏体合金应力腐蚀断裂与氢脆的机理。
In this paper the beam particle model at a fine structural scale is presented for analysis of the progressive failure of such brittle disordered materials as sandstone by different loadings.
为了分析砂岩类无序介质在各种荷载作用下的连续破坏过程，本文提出了梁-颗粒细观模型。
In this paper, the criteria of mixed mode brittle fracture are carefully examined. It has been shown that, the circumferential strain factor criterion is rational and safe.
本文讨论了线弹性断裂力学的复合型断裂准则。推荐了周向应变因子准则。
In this paper, the brittle fracture probability of weldments and the fracture toughness of heat affected zone (HAZ) were investigated according to the principle of the weakest link theory.
从最弱链模型的物理本质出发，探讨了影响焊接热影响区脆性断裂的主要因素。
This paper presents a study of using micro-abrasive water jet for the machining of micro-channels on brittle glasses. The erosion mechanism, surface pattern and process performance are studied.
作者在玻璃上进行微磨料水射流微细槽加工的实验基础上，对微磨料水射流加工的表面形貌、材料冲蚀去除机理及加工工艺性能进行了研究。
In this paper, the mechanism of brittle-ductile transition of glass-ceramics at different low temperatures was studied.
并用第一原理应力计算方法对单晶硅纳米切削过程中的脆塑转变的可行性进行了研究。
The paper introduces characteristics of grooved backup bar and analyses the performance of brittle fracture of steel frame connections using grooved backup bars.
介绍了开槽垫板施工工艺的特点，并利用有限元法和断裂力学原理对应用开槽垫板的高层钢框架节点的脆断性能进行了分析。
The paper introduces characteristics of grooved backup bar and analyses the performance of brittle fracture of steel frame connections using grooved backup bars.
介绍了开槽垫板施工工艺的特点，并利用有限元法和断裂力学原理对应用开槽垫板的高层钢框架节点的脆断性能进行了分析。
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