拉伸断裂

Totally 60 semi-circular bending specimens cored from superpave gyratory compactor with three groups of notch depths are tested at the temperature of-10 and 20℃ The experimental results reveal good repeatability in EAM characterization. The tensile strength ratio of SCB to the indirect tensile test is at a range of 1.4 to 1.7, and the ultimate strength of EAM is exponentially dependent on the notch depths. At the test temperatures, the critical J-integral value of EAM is much higher than that of hot mix asphalt with thermoplastic asphalt binder. The response mode of EAM changes from ductile mode to brittle mode and the fracture energy increases 30% when temperature decreases from 20 to-10℃, while its critical J-integral value decreases only 15%.

结果表明，环氧沥青混合料的半圆弯曲试验结果复现性好；由非切口试件的半圆弯曲试验与标准间接拉伸试验所测得的环氧沥青混合料的抗拉强度，其比值在1.4~1.7之间，且SCB抗拉强度与切缝深度指数相关；在20℃与－10℃试验条件下，环氧沥青混合料具有比热塑性HMA高得多的临界J-积只分值；当温度由20℃降至－10℃时，环氧沥青混合料的响应模式由延性变为脆性，断裂能增加30%，而临界J-积分值下降15%。

Based on linear elastic fracture theory, a damage evolution equation for composite soild propellant under uniaxial tension is derived. Main mecrosopic of material are determined through fittin the experiment data of constant rate tension. Then, the integrate constitutive equations found is close to microlevel.

基于线弹性断裂理论，提出了一个适合复合固体推进剂的脱湿微裂纹损伤发展方程，通过部分单向定速拉伸试验数据拟合确定其主要的细观参数，从而得到了复合固体推进剂在细观水平上完整且封闭的本构方程组。

The equilibrium phase particles that induce the sensitivity of the quenching are not the direct reason that causes the alloy fracture; the microzone of PFZ around particles limits crack extension and coordinates deformation, this causes the formation of the ductile tension fracture.

引起淬火敏感性的平衡相粒子，不是造成合金断裂的直接原因，粒子周围的无析出微区起到了限制裂纹扩展和协调变形的作用，是合金形成延性拉伸断口的原因。

It was found experimentally that HIC happens via nonacid nucleation and then quasi-cleavage along {111} planes when C〓 is higher. Otherwise, in the case of lower C〓, hydrogen enhances ductile fracture via hydrogen-enhancing microvoid nucleation, growth and connection.

对预充氢的310钢薄膜进行TEM原位拉伸表明，当氢浓度较高时，氢致断裂通过空洞形核，然后沿{111}面准解理扩展的方式进行；当氢浓度较低时，氢促进纳米空洞形核、长大和连通，进而导致韧断。

The polyurethane hot-melt adhesive film was prepared by casting process and the effects of polyether diol trpe,chain exlender amount andpolyol molecular weight on tensile strength,tensibility and hardness were studied.

采用流延法制备聚氨酯热熔胶膜，对影响聚氨酯热熔胶膜的拉伸强度、断裂伸长率、硬度的几个因素：聚醚多元醇类型、扩链剂用量和聚醚多元醇的分子质量等进行了研究。

The microstructure and damage tolerance property were adjusted by duplex anneals at 900℃,93 0℃,and 950 ℃ in α+β phase region and single anneal at 980℃ in β region for the TA15ELI titanium alloy plate.

采用一火β区热轧和一火两相区上部温度热轧获得了片状组织的TA15ELI钛合金厚板，通过两相区900℃、930℃、950℃和β区980℃退火热处理进一步调整合金显微组织和损伤容限性能，测定了不同热处理状态下合金的显微组织特征参数和室温拉伸性能、断裂韧性、疲劳裂纹扩展速率，分析了显微组织对损伤容限性能的影响关系。

Compared with asphalts,the tensile strength and the fracture elongation rate of the coating obtained increase 10～15 times respectively, and the coating has advatages such as light weight,seamless,easy to maintain and to apply.

这种防水涂料的拉伸强度比沥青的提高了 5～ 10倍，断裂伸长率比沥青的提高了 5～ 15倍，并且具有良好的耐酸碱、耐候和防水性能，涂层轻、无接缝、易修补和施工方便

The preparation of IPN water-borne PU/PA binder, and the influence of different proportion to tensile strength, elongation at break, crocking fastness, water and dust absorbency and soaping fastness are all introduced in this paper.

介绍了水性PU/PA的IPN涂料印花粘合剂的制备方法，及其不同配比对拉伸强度、断裂伸长率、摩擦牢度、吸水性、吸尘性、皂洗牢度的影响。

The results show that the cavity nucleates while the twin-roll-cast AZ31 alloy sheet deforms, and the cavity starts on the tri-grain boundary. The continuously growth and coalescence of the cavities induce the material fracture. The cavities grow directionally and prefer to grow along axis perpendicular to the loading axis.

结果表明：镁合金板材热变形过程中，空洞首先在晶界尤其是在三叉交界处形核，随后不断长大和聚合，导致材料断裂；空洞的长大具有方向选择性，与拉伸轴方向垂直的空洞容易长大。

Using SEM to analyse the fracture characterisics of its tensile sample,it showed that its fracture basically belonged to polymerizing and growin...

用SEM分析其拉伸试样断口特征，说明它的断裂基本上属于微孔聚合长大机制。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。