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damage to fractures
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  “damage to fractures”译为未确定词的双语例句
     The viscoelastic surfactant fracturing fluid with some salinity is known as clean fracturing fluid for its little damage to fractures and absence of polymer residue.
     粘弹性表面活性剂压裂液因不存在聚合物残渣,对裂缝损害小,而视为清洁压裂液。
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  相似匹配句对
     Laboratory damage appraisal and cleaning technology of hydraulic fractures
     压裂裂缝伤害室内模拟及裂缝清洗酸化工艺的应用
短句来源
     2. damage.
     2、损害事实。
短句来源
     Fractures of the calcaneus
     跟骨骨折
短句来源
     Rail Damage
     钢轨破损
短句来源
     Intertrochanteric fractures
     股骨转子间骨折
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In this paper,concrete materials are taken as three-phase composites consisting of mortar matrix,aggregate and bond between matrix and aggregate. Aggregate structures are randomly generated according to the concrete mix. Mesh of finite element is projected on a generated aggregate structure of concrete and different material properties are assigned to the respective elements according to element location in three phases. A failure criterion combining fracture toughness and strength is proposed. Whole...

In this paper,concrete materials are taken as three-phase composites consisting of mortar matrix,aggregate and bond between matrix and aggregate. Aggregate structures are randomly generated according to the concrete mix. Mesh of finite element is projected on a generated aggregate structure of concrete and different material properties are assigned to the respective elements according to element location in three phases. A failure criterion combining fracture toughness and strength is proposed. Whole processes of single edge notch specimen are simulated from damage to fracture under tension-displacement control condition using nonlinear finite element method. A new research method is presented for investigating fracture mechanism and developing computing strength of concrete.

将混凝土看作由水泥砂浆、骨料及二者间的粘结带构成的三相复合材料;根据混凝土骨料的级配随机产生了混凝土骨料结构,将有限元网格投影到该结构上,并根据单元的位置确定单元的材料特性,用以代表混凝土的三个相结构。提出了断裂韧性与强度综合破坏准则,采用非线性有限元技术模拟了单边裂逢受拉试件从损伤到断裂破坏的全过程,为混凝土破坏机理的研究和发展、混凝土计算强度提供了新的技术路径。

Foam fracturing fluids have been used to stimulate low pressure, fluid sensitive formations. The characters of foam fracturing fluids have been recognized as leaving minimal damage to fracture conductivity, flowing back quickly, lowing leak off efficient, high efficient fluid, high viscosity and strong proppant carring capacity. Parameters studied in the laboratory include: research and development system of CO 2 foam fracturing fluid, optimization of the formulation and the properties of CO 2 foam...

Foam fracturing fluids have been used to stimulate low pressure, fluid sensitive formations. The characters of foam fracturing fluids have been recognized as leaving minimal damage to fracture conductivity, flowing back quickly, lowing leak off efficient, high efficient fluid, high viscosity and strong proppant carring capacity. Parameters studied in the laboratory include: research and development system of CO 2 foam fracturing fluid, optimization of the formulation and the properties of CO 2 foam fracturing fluid being tested. In the end, conclusion drawn are (1) CO 2 foam fracturing fluid have a strong foamability and foam stability, predominate rheological and proppant carring capacity, lowing leak off and quick breakdown as well, which are satisfied to fracturing technology and it has been confirmed by the experimental results of reservoir cores that CO 2 foam fracturing fluid is characterized by lower expanding and damage for reservoir rock. (2) In the process of CO 2 foam fracturing, CO 2 foam fracturing crosslinked foam by acidity of agent have such capacities as improving dimensions of fracturing, increasing quantity of proppant and sand fluid ratio. Increasing production of CO 2 foam fracturing fluid has been testified in Changqing oil field.

泡沫压裂液适用于低压、水敏性储集层。通过室内试验及研究 ,优选出CO2 泡沫压裂液配方 ,得出对其性能测试的结果 :起泡、稳泡能力强 ,流变性能、携砂能力好 ,低滤失 ,破胶快等 ,岩心实验证实具有低膨胀及低伤害特性 ,可以满足压裂工艺设计的要求。CO2 泡沫压裂施工中 ,如要提高施工规模、增大砂量及砂液比 ,使用酸性交联压裂液体系可确保施工的顺利进行。在长庆油田等现场实施的CO2 泡沫压裂液增产效果良好。图 2表 5参 3 (丁云宏摘 )

A process of creep damage in a cylindrical bar combined bending and torsion is researched by an un-coupling model.The latent damage time of the creep damage in a cylindrical bar of nonlinear material is derived.A kinetic equation of a front is analysed and the damage time of the bar is derived. Results show that latent damage time and damage time have something to do with the character of material,loads and geometry character of a cross section.For a relatively small material...

A process of creep damage in a cylindrical bar combined bending and torsion is researched by an un-coupling model.The latent damage time of the creep damage in a cylindrical bar of nonlinear material is derived.A kinetic equation of a front is analysed and the damage time of the bar is derived. Results show that latent damage time and damage time have something to do with the character of material,loads and geometry character of a cross section.For a relatively small material constant m of the bar,there is a period of time from latent damage to fracture.The damage may be repaired at the same time.For a great m,The creep rupture in the bar is brittle destruction and there is no expended stage of damage zone.

采用非耦合模型,对圆轴在弯扭组合变形状态下的蠕变损伤过程进行了研究.对于非线性材料圆轴求出了其损伤的潜破损时间,继而通过分析破损阵面的运动,求出破损时间,分析结果表明潜破损时间和破损时间都与材料的性质,载荷的大小,圆轴横截面的几何性质有关.当材料常数m较小时,圆轴发生潜破损后,到发生断裂尚有一段时间可以进行补救;而当m足够大时,圆轴的蠕变损伤破坏为脆性破坏,不存在损伤区扩展阶段.

 
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