单向拉伸

Test of simple tension at different orientation ; angle of orientation ; yield condition of aeolotropy ; plasticity strain ratio ; bidirectional fortification or weakening

不同取向的单向拉伸试验；取向角；各向异性屈服条件；塑性应变比；双向强化或双向弱化

Digital speckle correlation method is adopted to measure parameters ofMooney-Rivlin model of rubber in the simple tension experiment. The globaldeformation of tire, distribution of equivalent Cauchy stress and distributionof normal contact forces between tire and ground are analyzed.

应用数字散斑相关法和单向拉伸实验测定了胶料的Mooney-Rivlin本构参数；分析了轮胎的整体变形、接地法向力分布和等效Cauchy应力分布。

In order to investigate the static mechanic properties of wood-bamboo composite city bus- floor, elastic modulus and strength of component materials——poplar veneer, bamboo shoot and wood-bamboo composite city bus-floor were measured by uniaxial tension, electrometry and three-point bending.

为了考察木／竹复合城市客车底板的静态力学性能，本论文利用单向拉伸法、电测法和三点弯曲试验法对组分材料——杨木单板、竹片以及木／竹复合城市客车底板的弹性模量和强度等进行了综合研究。

The property of the point of inner corner reflects the material single tensile property, the main function of the point is σ〓 and ε〓.

接管角焊缝内拐角点的特性基本体现了材料的单向拉伸特性，该点起主要作用的是σ〓和ε〓。

In simple tension experiment, the stress-strain relationship submits Hook's law within the limit of proportionality .

摘要单向拉伸试验中，在比例极限内，应力应变关系服从胡克定律。

Relationships of leakage magnetic induction distribution and stress concentration for ferromagnetic plate with pore in center were studied.

研究了含小孔铁磁平板单向拉伸时应力集中状况与漏磁场分布的关系。

It has been found that there are some texture flaws such as large grain、badly distorted twin and streaky structure. But recrystallization grains ofaround 19μm in diameter on average are obtainable through heat treatment at300℃for 30min by air-cooling, meanwhile the twin and streaky structurethat would weaken the plasticity of alloy are eliminated; significant elementsare holding temperature、holding time、cool-down methods. Mechanicalproperties of tube are obtained, simple tension elongation ratio of arc testsample increases from 10.8% to 20.1%, elongation ratio with elastic internaldie of tube increases from 8.0% to 14.9%.

研究结果表明：挤压成型的AZ31镁合金管材组织中存在变形程度很大的孪晶、大尺寸晶粒、丧失了进一步变形能力的条带状组织等易导致后续塑性加工时变形不均，引起断裂的组织缺陷；采用最佳等温热处理工艺以20℃／min加热至300℃保温30min后空冷处理可以使试样平均晶粒直径从挤压态的50μm细化为19μm，同时基本消除上述组织缺陷；明显影响热处理效果的因素为保温温度、保温时间、冷却方式；室温下，采用最佳工艺热处理前后管材弧形试样的单向拉伸伸长率由10.8％提高至20.1％，管件的自由胀形极限伸长率由8.0％提高至14.9％。

Based on this model, two formulas for estimating the equivalent stretching and compressive Young＇s modulus are derived.

此外，本文通过泡沫材料的单向拉伸、压缩试验，完成了泡沫材料拉压双模量效应的试验验证。

Weibull distribution function is used to characterize phenomenologically the debonded probability of the interface, which is decided by the tensile stress of the particle. A partially debonded isotropic spherical elastic particle is replaced by an equivalent, perfectly bonded spherical particle, which possesses yet unknown transversely isotropic elastic moduli. The fictitious particles can be determined in such a way that their tensile and shear stresses will only vanish in the debonded direction.

认为颗粒增强金属基复合材料的界面脱黏受控于颗粒所受的拉应力，引入Weibull分布函数描述颗粒脱黏概率，且受单向拉伸载荷作用时，仅在沿受力方向的上下两侧发生部分界面脱黏，从而将部分脱黏的各向同性颗粒由一完好的横观各向同性颗粒来等效，建立了部分脱黏模型。

The results indicate that the tensile flow stress of the composite sheet decreases with increasing deformation temperature and decreasing strain rate,while the maximum elongation to failure increases from 5.03% to 71.07%.

摘 要：当温度为300~450 ℃，应变速率为0.001~0.1 s1时，在WDW-E200拉伸机上采用单向拉伸实验研究喷射沉积7075Al/SiCp复合材料板材的高温变形行为；分析板材的变形激活能以及流变应力、变形温度和应变速率之间的关系。

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％。