• 高温损伤由于过热引起,过热使金相组织内部产生空洞,在应力空洞扩展连接形成裂纹

    Creep damage is mainly caused by superheat. Because of superheat, creep cavities are formed inside microstructure, under heat stress condition, growth and join of cavities induce creep cracking.

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  • 利用粘土试件进行了三试验从而获得了复杂应力状态曲线。

    The specimens of frozen clay are used for carrying out the long-term creep tests under triaxial stress states so that the creep curves of the frozen clay are derived.

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  • 结果人体硬脑膜特征为:初始所加的应力大体成线性关系时间缓慢增加

    Results the creep properties of human dura presented a linear-relationship between initial strain and stress, and the creep strain increased slowly with time.

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  • 随施加应力增大,纤维增大,抗断裂时间断裂伸长小。

    The constant creep rate was increased and creep-resistance breaking time and creep breaking elongation were decreased with the increase of applied stress.

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  • 通过规则齿形结构双轴应力条件下试验,对规则齿形结构面剪切特性进行了深入的研究分析规则齿形结构面的基本规律。

    Testing study is made on the creep characteristic of regularly dentate discontinuity in the condition of two-axial stresses, and the normal creep rule of regularly dentate discontinuity is analyzed.

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  • 同时,对高温结构提出一种简便可行恢复应力分析方法,并通过说明恢复影响

    A simple and efficient analytical method of creep recovery stress is provided. The effect of creep recovery is demonstrated by a numerical example.

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  • 瞬时剪切行为存在加载速率温度相关性;剪切曲线形状寿命与温度应力大小有关。

    Shortterm shear behaviors depend on loading rate and test temperature while the shapes of the shear creep curve and the creep lives depend on test temperature and stress.

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  • 结果显示动态循环状态,大小、速度与循环应力幅值有关。

    The experimental results showed that the dynamic strain has feature of cyclic creep. Cyclic loading affected the creep and creep speed.

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  • 试验结果表明横向稳定阶段应力低于轴向稳定阶段的应力阈值;

    The experimental result shows that the lateral stress threshold of the second creep stage is less than that of axial stress threshold.

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  • 通过大量冻结粘土单轴试验获得了单轴应力状态曲线及其参数

    Through a lot of creep test of frozen clay under single-axial stress, the curves and parameters of creep under single-axial stress state are obtained.

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  • 臂丛神经进行应力松弛实验实验,得出应力松弛、实验数据曲线

    Superior trunk of brachial plexus nerve was performed stress relaxation test and creeping test, and data and curve of stress relaxation test and creeping test were obtained.

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  • 介绍了汽轮机转子、主蒸汽管道汽缸稳态应力稳态变应力计算方法,采用大型有限元分析计算程序计算汽轮机部件的非稳态变应力和稳态变应力

    The method takes into consideration both for steady and unsteady creep stresses of rotors, pipes, casings and valve housings to be determined with the help of finite element analysis programs.

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  • 采用CSR法对应力测试进行了研究材料试验机上实现了CSR法的应力测试。

    The research was carried out on the basis of CSR to measure creep internal stress.

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  • 利用自行改装后三轴海相沉积的营口进行试验,获得了在不同、不同偏应力条件剪切时间关系数据。

    The relationship between shear strain and time of Yingkou soft soil is obtained under a series of different cell pressures and different deviator stresses.

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  • 本文给出尼龙1010材料不同温度不同应力水平实验结果提出包含激活方程方程实验数据良好符合

    Creep results on Nylon 1010 are given in series of temperature and stress levels. Creep equation containing a creep activation energy is suggested, and it is in agreement with experimental data.

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  • 试验研究本文考虑各种金属应力应力行为应力集中加载方式破坏影响

    In experimental studies the authors considered the behaviour of various metals under constant and variable stresses, stress concentration, influence of way of loading on creep rupture;

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  • 应力达到一定水平时,岩石加速损伤发生衰减稳态

    When the stress reaches a certain level, the accelerated creep damage of rock occurred after the decay creep and steady creep.

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  • 相同应力条件,不排水常规压缩小于减压三轴压缩的应值;

    The value of strain of undrained conventional triaxial compression creep is less than that of reduced triaxial compression creep under the same deviator stress;

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  • 局部损伤理论实质就是试样多种不同性能材料统一 ,变应力分布得到证实。

    The essence of localized damage theory is that materials could be divided into several different groups with different creep damage and proved by stress redistribution.

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  • 结果表明CSR法测定高温构件应力可行,将应力用于高温构件的剩余寿命预测有效的,可克服一般外推方法的不足。

    The results showed that it was viable to use CSR measuring creep internal stress of high temperature components and effective to forecast residual life of high temperature components using …

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  • 而以极限为失效准则应力常规试验为基础的等温外推法相比具有试验时间优点

    It is also shown that under the creep limit failure criterion, the creep internal stress method has the advantage of less test time in comparison with the isothermal...

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  • 试验结果表明:2618铝合金表现较高应力指数引入门槛应力后,合金行为得到满意解释;

    It was found that 2618 aluminum alloy exhibits a higher creep stress exponent. The creep behaviors of the alloy can be described by using threshold stress.

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  • 基于理论提出振动时效循环力学本质上的相关性,并对交应力温度材料特性共同影响因素进行了分析。

    Based on the creep theory, the mechanical relationship of VSR and cyclic creep was discussed, and common factors such as stress amplitude, temperature and material properties were analyzed.

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  • 应力松弛实验数据进行一化处理,得出归一化应力松弛函数函数曲线

    The stress relaxation data were dealed with normalization, we get out normalization stress relaxation function, creep function and curve.

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  • 应力松弛实验数据进行一化处理,得出归一化应力松弛函数函数曲线

    The stress relaxation data were dealed with normalization, we get out normalization stress relaxation function, creep function and curve.

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