The criterion of the element with the maximum tensile stress will crack is presented, the iteration flow diagram of nonlinear analysis is improved, and then the position, gap and width of crack can be computed based on ′ smeared ′ crack model.

The polypropylene fiber concrete has excellent tensile performance, crack resist-ance, ductility and load-carrying capacity and especially the polypropylene fibers can contribute to good control of early cracking in the surface of concrete.

聚丙烯纤维混凝土具有优良的抗拉性能、抗裂度、韧性和承载力，特别是对水泥混凝土表面的早期开裂控制起到了良好的作用。

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The addition of polypropylene fiber decreases the shrinkage ratio of mortar and increases its tensile strength, crack energy, and the max strain, i.e. its toughness rises and brittleness falls.

聚丙烯纤维使水泥砂浆收缩率降低，抗折强度／抗压强度提高，最大变形量与断裂能增大，即使砂浆韧性提高、脆性降低。

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Established the calculation model of waterproof layer tensile above bridge crack, compute a minimum extension and strength the waterproofing layer must have hi a certain width crack.

建立了桥面裂缝之上防水层张力的计算模型，有效地计算出桥面混凝土一定宽度裂缝上防水层须具备的最小延伸率和拉伸强度。

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A study of tensile-shear crack and strength related to jointed rock mass

节理岩体拉剪断裂与强度研究

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The result shows that the tensile fracture crack forming of acid washing and mechanical polishing is microporous polymer and the tensile properties of acid washing is better than that of the mechanical polishing.

拉伸试验及扫描电镜断口观察等研究结果表明：酸洗、机械抛光拉伸试样表现为韧性断裂，其断裂机制为微孔聚合断裂，酸洗表现出更好的综合性能；

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The fracture mechanisms of 2090+ Ce aluminum-lithium alloys aged for different time are studied by means of semi-quantity method, and the process of the tensile fracture crack forming is discussed especially.

以2090+Ce合金为研究对象，对不同时效时间的室温拉伸断口进行了半定量分析，探讨了拉伸性能对断裂特征的响应关系，重点分析合金分层裂纹的形成过程。

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The tensile fracture crack behaviour of pearlitic ductile cast iron containing various amounts of broken ferrite was observed using SEM.

用扫描电镜对合有破碎状铁素体的珠光体球铁进行拉伸断裂过程的动态观察，研究裂纹萌生、扩展与石墨球、铁素体、珠光体组织的关系。

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The modified tensile stress crack propagation criterion and influence of cranny hydraulic pressure on crack propagation

修正的拉应力裂纹扩展准则及裂隙水压对裂纹扩展的影响

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By investigating the fracture trace of epigenetic deformation in dam area of a hydropower station, silted tensile crack, a destructive mode of rock mass, controlled by rock mass structure is found except normal unloading destructive mode which is parallel to river bank slope.

通过对某水电工程坝区岩体结构的表生改造形迹调查，发现坝区除了发育与岸坡平行的正常的卸荷破坏方式外，还发育了一种破坏方式&夹泥型张裂隙。

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The triaxial extension test and the cyclic extension compression test are used in the research of soil failure under static tensile crack or cyclic tensile crack conditions to identify the development of tensile crack as well as shock crack in FEM analysis of embankments.

三轴拉伸试验和周期拉压试验，用于研究静力拉裂和周期加荷拉裂的破坏，在土石坝有限元分析中判别防渗体土料拉裂和震裂的发生与发展。

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The measured stress and numerical simulation indicated that the whole tensile crack and the arc tensile crack were correspondent to the distribution of maximum tensile stress, the magnitude of which increased due to transition effect.

应力测试与数值模拟证明弧形拉裂和整体贯穿拉裂同最大拉应力分布相对应，并且受迁移影响边坡坡顶最大拉应力值增大。

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This paper adopts the contact element to consider the dislocated slippage and tensile crack, and uses the infinite element to reflect the far field effect of the groundsill infinite region more efficiently.

采用无限元更有效地反映地基无限域的远场效应；

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By embedding the above research achievements in existing FEM computing program system, a three-dimensional computing program system was developed, which can be used to stress-deformation and tensile crack analysis of earth-rockfill dams.

将上述研究成果嵌入已有有限元计算程序系统，发展了土石坝应力变形和裂缝分析三维计算程序系统。

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The shear crack would expand along the shear direction and the tensile crack would expand some distance along the radial direction and then expand along the shear direction in this experimental strain-rate.

在实验加载应变率范围内，剪切裂纹在外壁面萌生后会一直沿剪切方向向内壁面扩展，拉伸裂纹在沿径向扩展一段距离后，转而沿剪切方向扩展。

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Static tensile crack behavior of brazed joints of dissimilar metals tubes in aerospace system

航天器异种金属钎焊接头静态裂纹行为分析

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Geology feature of plastic flow and tensile crack type landslide and its formation mechanism

塑流－拉裂型滑坡地质特征及形成机理

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Through the simulations experiments with different initial velocity, we analyse the impact of strain rate on tensile properties, fracture characteristics and fragment number of expanding ring expansion spherical shell.

并通过不同初始速度下圆球壳膨胀碎裂的数值模拟实验，以分析应变率对膨胀球壳冲击拉伸力学性能、碎裂特性和碎片数的影响。

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Tensile behavior and fracture characteristics of step-quenched dual-phase steel 20

台阶淬火双相20钢的拉伸行为及断裂特征

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Tensile strength and deformation characteristics of granular materials

粒状材料的强度与变形

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Investigation of tensile strength statistic characteristics of the impregnated fiber bundles

浸胶丝束拉伸强度统计分布研究

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