韧性裂纹开始扩展的J积分值对于韧性断裂的工程构件是一个重要的材料性能指标。
J integral value related to the initiation of ductile crack is important material properties for the engineering structure of ductile fracture.
使钢产生热脆性，降低钢的延展性和韧性，在锻造和轧制时形成裂纹。
Causes the steel to produce the hot brittleness, reduces the steel the ductility and the toughness, when forging and rolling crack.
通过试验研究了力学不均匀性对接头断裂韧性和裂纹开裂角的影响。
Effects of mechanical heterogeneity on fracture toughness and crack deviation Angle of the joints were investigated by experiment.
从选材角度对比分析了几种铝合金的动态断裂韧性及裂纹扩展阻力。
From the view point of material selection, we analyzed their dynamic fracture toughness and crack propagation resistance.
由于表面热疲劳裂纹的产生，使得材料强度性能损伤大于断裂韧性损伤。
The strength loss is greaser than the fracture toughness loss, because ofthe surface cracks caused. by thermal fatigue.
结果表明，材料的磨料磨损主要由显微切削和显微裂纹两个因素控制，材料的耐磨性由其强度与韧性的配合所决定。
The results show that the abrasive wear loss is mainly controlled by micro-cutting and microcracking. The wear resistance may be determined by the combination of strength and toughness.
结果表明：加入微量镁，不仅能延长合金的蠕变裂纹形成寿命，而且能提高合金的蠕变韧性。
The results show that addition of small amounts of Mg can not only notably increase the creep crack growth life but also increase creep toughness.
Q345是广泛使用的一种普通低合金钢，其断裂韧性是工程中进行裂纹检测的重要参数。
Q345 steel, a common low carbon alloy steel, was widely used in industries. The fracture toughness of Q345 steel is an important parameter for measuring cracks in engineering.
应用线弹性断裂力学的弹性能释放率及裂纹扩展阻力等基本概念和理论，建立起确定纤维增强高分子聚合物复合材料断裂韧性的能量方法。
An energy method for determining fracture toughness of fibrous composite laminates was based on the theory of elastic energy release rate and crack-growth resistance in this paper.
采用缺口和裂纹两种试样测定合金的断裂韧性；
The fracture toughness of the alloys was measured on single-edge notched beam and cracked beam specimens.
因此，对这种材料在宏观裂纹分叉速度时，实验断裂表面能及断裂表面韧性没有单一值。
Consequently, at the macroscopic crack branching velocity, the experimental fracture surface energy and the fracture surface roughness; have no single value in such materials.
这是由于弱间层的存在将出现裂纹偏转现象，吸收大量的断裂功，从而大幅度提高了裂纹的扩展容限，使断裂韧性有较大增长。
The crack will deflect because the weak layer exits, which will absorb more amounts of fracture work and improve the crack tolerance greatly, therefore the fracture toughness increases remarkably.
塑性动态断裂韧性CTOD，及其在不同裂纹扩展速度下变化规律的测试。
The dynamic plastic fracture toughness CTOD and its variation with different. crack propagation speeds.
比较了不同初始裂纹尺寸和断裂韧性对疲劳寿命的影响，并给出了算例。
The effects of dimensions and toughness of different initial fractures on fatigue life are analyzed and calculation cases are presented.
还比较了不同初始裂纹尺寸和断裂韧性对疲劳寿命的影响，并给出了算例。
The fatigue life in different initial crack sizes and different fracture toughness was compared, and an example was given.
添加缓蚀剂后使N80试样的韧性有明显的增加，断口裂纹缝隙明显减小，力学性能有了明显的提高。
The mechanical property of N80 steel has increased obviously after adding corrosion inhibitor, where the ductility of N80 steel increased, and crack fissure of fracture surface decrease.
等轴组织具有较好的拉伸性能、低的断裂韧性和高的疲劳裂纹扩展速率；
The equiaxed structure has good tensile property, low fracture toughness and high fatigue crack propagation rate.
为确定热障涂层的残余应力、结合力、断裂韧性、疲劳裂纹扩展速率等性能和特性，需要知道其杨氏模量和泊松比。
To analyze the characteristics of TBCs such as residual stress, bond strength, fracture toughness, and crack propagation ratio, the Young's modulus and Poisson's ratio are important parameters.
根据试验测定的焊缝各区冲击韧性、断裂韧性、疲劳裂纹扩展速率和疲劳裂纹扩展门槛值，对焊缝力学性能作出综合评价。
The mechanical properties of the butt welded joints have been evaluated according to the impulsive and fracture toughness as well as the rate and threshold values of fatigue crack propagation.
具有良好的韧性和抗热裂纹能力，用于精轧机组第1 - 4架的高速轧制。
With good toughness and resistance to thermal cracking, they are used in 1-4 stands for high speed rolling.
在试验温度区内，控制韧性的因素是断裂载荷、纤维裂纹长度和单位纤维裂纹扩展能量。
Within the range of test temperature, the factors controlling the toughness are fracture loads, the lengths of fibrous crack, and the energy absorbed by each fibrous crack extension.
通过开疲劳裂纹和线切割裂纹的对比试验，研究裂纹尖端的尖锐程度对球墨铸铁断裂韧性的影响；
By comparing fatigue crack with electrosparking crack, the effects of crack tip on fracture toughness of ductile iron have been studied.
镍基过渡合金既起到弥散强化作用，又能提高其韧性，减少裂纹产生。
The Ni-based transition alloy had a function of dispersion strengthening, and ahvanced the toughness, reduced the trend of cracking.
采用金相和电镜等手段对堆焊裂纹形貌进行了观察，并研究了稀土氧化物对堆焊金属抗开裂性能及塑、韧性的影响。
The crack morphology of hardfacing metal was investigated by means of optical and scanning electron microscopy. The effect of re oxide on cracking resistance of hardfacing metal was studied.
主要进行了环氧及增韧环氧树脂的断裂韧性及裂纹快速扩展的试验研究。
Fracture toughness and the rapid crack propagation are studied on epoxy and toughed epoxy.
由于壳体基材有高的断裂韧性，堆焊层裂纹不会扩展到壳体基材，堆焊层裂纹不影响加氢反应器的使用性。
The causes of weld overlay cracking on hydroprocessing reactors and the effect on serviceability were analyzed in this paper.
使用应变片方法确定了裂纹的起裂时间，结合有限元数值模拟得到了裂纹的起裂韧性；
The initiation time of crack is measured by strain gauge on the sample. The fracture toughness of the composite material is determined by FEM numerical simulation.
引入分形几何理论，应用分形方法来描述岩石断裂裂纹的曲折形态，进而建立分形裂纹下的岩石断裂韧性理论模型。
The fractal methods are used to describe the tortuous shape of rock fracture cracks, and the theoretical models for fracture toughness of rock with fractal cracks are built.
奥氏体组织分割了马氏体束或马氏体板条，减小了有效晶粒尺寸，阻止裂纹扩展，提高材料的韧性和塑性；
Austenite separates the martensite blocks or laths so that it can reduce the effective grain size and prevent cracks from propagating.
奥氏体组织分割了马氏体束或马氏体板条，减小了有效晶粒尺寸，阻止裂纹扩展，提高材料的韧性和塑性；
Austenite separates the martensite blocks or laths so that it can reduce the effective grain size and prevent cracks from propagating.
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