抗拉应力

在以混凝土抗拉应力为控制的高拱坝设计中，按不同模量弹性理论进行分析是必要的。

The tensile stress of concrete is normally the key factor in the high arch dam design , so the analysis based on the different modulus elasticity theory is necessary .

岩石抗拉强度是指岩石试件在外荷载的作用下抵抗抗拉应力的能力，为岩石试件在拉伸破坏时的极限荷载与受拉截面面积的比值。

The tensile strength of rock is the ability to resist tensile stress in the rock specimen as a role of external load and ultimate load in the tensile failure of rock specimen with pull-sectional area .

高强混凝土的抗拉应力－应变全曲线应力集中；

The Completess-strain Curves of High Strength Concrete under Direct Tension stress concentration ;

将混凝土环应力公式与最大抗拉应力破坏准则相结合，预测混凝土环开裂时间。

Simultaneously the ultimate tension stress was also introduced to predict the cracking age of concrete ring .

在普通试验机上进行的混凝土抗拉应力-应变全曲线的试验研究结果表明，在抗压全曲线试验中采用的刚性试验机和附加刚性组件的方法在抗拉全曲线的试验中并不适用。

The results made clear that the widely used method with attached stiffness set in compressive test of stress-strain complete curve was not proper for concrete in direct tension . complete curve of a three-point bending concrete beam is realized .

利用扫描电镜（SEM）分析了材料拉伸断面形貌，探讨了混杂纤维增强机制，分析了混杂效应系数的主要影响因素，研究了混杂效应系数与材料横向抗拉强度和应力松弛率之间的关系。

The enhancement mechanism of hybrid fiber was investigated by observing the SEM photos of cross section . The main factors affecting the hybrid effect coefficient were presented and the relationship among this coefficient , transverse tensile strength and stress relaxation rate of NAFC materials was discussed .

数值模拟表明，在应力波作用下的岩石破裂取决于三个因素：材料的抗拉强度、应力波的应力幅值以及应力波的波形。

Numerical results denoted that the dynamic failure processes are controlled by three factors : i.e. tensile strength of rock , amplitudes of stress waves and waveforms of stress waves .

依据UHTCC直接拉伸应力应变试验曲线，对UHTCC材料在极限抗拉强度之前的应力应变关系进行了合理简化，并给出了相应的抗拉本构方程。

Reasonable simplifications of tensile stress versus strain relationship before ultimate tensile strength are conducted according to experimental curves , and the corresponding constitutive equations are also given accordingly . 4 .

试验结果表明，抗压强度、弹性模量、抗拉强度以及临界应力强度因子随标准养护时间的增长而增大，弹性模量对养护条件的敏感性最大。

The test results show that the longer the time of moist curing , the higher the values of compressive strength , splitting tensile strength , elastic modulus and critical stress intensity factor .

试验结果表明，对于高强混凝土最大粗骨料粒径增大，弹性模量和抗压强度减小，而抗拉强度和临界应力强度因子以及材料的脆性增大；

The test results show that , for high strength concrete , the compressive strength and elastic modulus increase with decreased maximum coarse aggregate size , but the splitting tensile strength , critical stress intensity factor and brittleness varied in the opposite sense .

计算结果表明，温度上升在肋梁附近的翼板下部将产生超过混凝土抗拉强度的拉应力，导致雁形板沿纵向开裂，形成贯通板全长的纵向裂缝。

The calculated results indicate that when the temperature changes , the tensile stress at the lower extreme fibers of the flange plate near rib exceeds the tensile strength of concrete subjected to the combined action of triaxial stresses and results in the longitudinal cracks of the flange plate .

影响根系抗拉特性的主要因素有根长、根径、根形等。通过对油松抗拉应力应变关系的分析，构建了油松根系的双曲线本构模型、二阶抛物线模型和三阶抛物线模型。

The factors effecting root tensile properties include root length , root diameter , root shape , etc. Based on analyzing the stress-strain relationship , hyperbola constitutive model , second-order parabola model and third-order parabola model were built up Pinus tabulaeformis root system . 3 .