复合型裂纹起裂、扩展和止裂问题一直是断裂力学研究的重点。
The study of problems involving crack initiation, propagation and arrest is always the interest of fracture mechanics.
根据断裂力学的原理，提出了脆性破裂的止裂准则，给出了最小止裂方程。
Based on the principle of fracture mechanics, the stop criterion of brittle fracture is proposed and the equation of minimal crack stop is given.
根据渗流力学、岩石力学、传热学、断裂力学知识，建立了油水井三维水力压裂模拟计算的数学模型。
According to the theory of fluid mechanics in porous media, rock mechanics, heat transferring and fracture mechanics, the mathematic model is established to characterize 3d hydraulic fracturing.
应力腐蚀临界应力强度因子的测试方法是基于线弹性继裂力学理论和应力腐蚀理论提出的一种新的测试方法。
A new method of testing the critical stress intensity factor for stress corrosion cracking based on linear-elastic fracture mechanics theory and stress corrosion cracking theory was put forward.
通过断裂力学分析，估算出u 74重轨的正常使用寿命及伤轨残余使用寿命；探讨了钢轨纵裂的可能机制。
Normal service life of U74 heavy rail and service life of the damaged rail are estimated by fracture dynamical analysis and possible mechanism on the longitudinal crack on the rail discussed.
本文提出了光面爆破和预裂爆破的断裂力学模型，分析了应力波、爆生气体准静态压力在爆破破裂过程中的作用。
This paper presents a fracture mechanics model of smooth blasting and pre-split blasting, analyzes the function of stress waves and quasi-static pressure of explosion in blasting process.
分别应用断裂力学中的最大拉应力理论和应变能密度因子理论分析了重复压裂中水力裂缝的初始扩展和延伸方向。
By maximum tension theory and maximum strain energy density theory in fracture mechanics, created and propagation direction of new artificial fracture are analysized.
利用断裂力学原理阐明了切槽爆破机理，提出了切槽预裂爆破的刀具参数，依据现场初步试验成果指出了下一步应改进的切槽刀具参数。
The notch blasting mechanism is expounded by the fracture mechanics principle, the cutting tool parameters for notch presplitting blasting is put forward.
为研究初始裂缝尖端起裂的条件和所需注水压力，依据断裂力学的复合型裂纹的脆性断裂理论，建立了裂缝尖端力学模型，给出了计算方法。
For researching crack initiation condition and water injection pressure needed, this paper built up a mechanics model of crack tip based on crisp fracture theory of compound crack.
大师爆炸，火灾，压裂和破坏，动力学模拟都在真正的生产流水线！
Master Explosions, Fire, Fracturing and Destruction, Dynamic Simulations all in a real production pipeline!
应用传统强度理论和细观力学方法对几种韧性材料在复合载荷条件下的断裂机理、启裂位置、开裂方向进行了实验分析和应力场计算。
In this paper, fracture mechanism, position and direction of crack initiation of mixed mode fracture in several ductile materials are tested, and stress distributions of which are analyzed.
它以板裂结构的岩体力学模型为基础，推导出了采场当量暴露面积的计算公式。
On the basis of rock mass mechanics model of cracking plate structure, it derived the calculation equation for the equivalent exposed area of mine stope.
研究结果表明：减缩剂能够改善高性能混凝土的工作性、对混凝土的力学性能无负作用、能够有效的提高混凝土的抗裂性能。
The results is to approve that SRA can improve the workability of HPC, and promote effectively anti-cracking performance, without coming negative effect into mechanics property.
穿过单条或者多条裂缝的压裂水平井不稳定渗流问题是一个复杂的渗流力学问题。
Unsteady porous flow in horizontal Wells with single or multiple fractures is a complicated study of mechanics through porous media.
介绍了焊接690合金焊条HT-105的化学成分、力学性能、抗热裂性能和抗晶间腐蚀性能。
The chemical compositions, mechanical properties, solidification crack risistance and intergranular corrosion risistance of HT-105 electrode for welding of 690 alloy are introduced in this paper.
通过力学参数测量和微观观察研究了初始损伤对钢的延性起裂韧性影响。
By using measurement of mechanical parameters and microscopic observation, the effect of initial damage on the ductile fracture initiation toughness of steel was investigated experimentally.
提出了应用常规的地面压裂施工压力资料求取煤层岩石力学参数的一种新方法。
Put forward a new method applying conventional ground fracturing construction pressure to get coal bed rock mechanical parameters.
研究结果表明：减缩剂能够改善高性能混凝土的工作性，对混凝土的力学性能无副作用，能够有效地提高混凝土的抗裂性能。
The results prove that SRA can improve the workability of HPC and promote effectively anti-cracking performance of concrete, without any negative effect on the mechanical property of concrete.
应用常规的地面压裂施工压力资料和前置液阶段的瞬时停泵压力测试等资料，初步探讨了求取储层原位岩石力学参数的新方法。
The rock mechanics parameters, such as Yangs modulus and Poisson's ratio, are determined on the basis of surface fracturing treatment pressure and instantaneous shut-in pressure during PAD stage.
采用分子动力学模拟方法，可以对结合材料的界面起裂过程进行模拟，从而获得结合材料界面应力和界面破坏之间的关系。
A simulation method of molecular dynamics is introduced to simulate the interface crack initiation, from which the correlations between the interface stress and the interface fracture are acquired.
介绍了单节段内经峡部加压螺钉内固定植骨和张力带钢丝法治疗腰椎峡部裂的临床应用和生物力学实验研究。
Clinical and biomechanical studies about the treatment of spondylolysis by internal and bone-grafting of the defect within single segment were introduced.
分子动力学模拟和宏微观分析均得到裂纹起始扩展的临界时刻、裂尖应力场和原子平均能量。
When crack starts to grow, the normal stress and average atom energy at the crack tip in atomistic simulation agree well with the results of continuum analysis.
在中国西南某新型引水式水电站工程中使用水压致裂技术开展了原地应力及相关岩体力学参数测试。
The hydraulic fracture technology is employed to estimate the in-situ stresses and other relevant mechanical parameters of rock mass at a new-type diversion hydroelectric project in China.
介绍了超低碳贝氏体wdb620钢的力学性能，用几种传统的焊接性试验方法对该钢焊接接头的力学性能及抗裂性进行了研究。
The mechanical properties of steel WDB620 are introduced. Some traditional tests about the mechanical properties and cracking resistance on its welded joint have been made.
根据有限元分析的结果，对混凝土保护层锈蚀胀裂破坏的弹性力学模型进行修正，建立了混凝土保护层锈蚀胀裂时钢筋锈蚀量的计算模型。
According the result of ANSYS analysis, a new model based elasticity mechanics is developed for calculating the corrosion loss that need for concrete cover cracking.
从钢水成分影响钢的高温力学性能的角度，研究钢水成分对钢的高温力学性能和CSP薄板坯表面纵裂的影响。
This paper analyzes the composition of liquid steel on the high - temperature mechanical property of steel and longitudinal surface crack of CSP slab.
对轻骨料高强度钢纤维混凝土的抗压强度、初裂强度、弯曲强度、弹性模量和弯曲韧性指数等主要力学指标进行了试验研究。
The flexural strength, first crack strength, modulus of elasticity and flexural toughness of high-strength lightweight fiber-reinforced concrete were investigated.
对轻骨料高强度钢纤维混凝土的抗压强度、初裂强度、弯曲强度、弹性模量和弯曲韧性指数等主要力学指标进行了试验研究。
The flexural strength, first crack strength, modulus of elasticity and flexural toughness of high-strength lightweight fiber-reinforced concrete were investigated.
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