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 动态应力应变关系 添加此单词到默认生词本
dynamic stress-strain relationship

  1. 介绍了一种研制的型砂性能检测系统与测试方法,通过对标准砂样的测试,能迅速、准确地测得砂样受载过程中的应力应变动态关系曲线及反映型砂本质特征的几项性能参数,这是型砂性能检测领域中的新探索,其中型砂粘弹性指标及塑性变形临界值乃是型砂性能方面的新概念。
    A developed measuring system and test method of green sand properties are introduced.By means of measuring the standard molding sand specimens,the dynamic curves of stress-strain can be quickly and accurately plotted out and several parameters,which represent the characteristics of molding sand,can be tested during the process of compressive deformation.In this brand new method of property measurement two new concepts of viscoelastic parameter and plastic deformation threshold are put forward.
  2. 利用动三轴试验,研究了全风化花岗岩在重复荷载作用下的动态特性,根据累积应变随加载次数的变化规律,建立了动强度曲线,分析了动强度与围压、压实度以及动模量与动应力的相关关系,讨论了含水量对动态特性的影响,提出了运用动态特性评价公路路基填料的方法,并在实际工程中予以应用。
    The dynamic-triaxial test was carried out to study the dynamic characteristics of granitic residual soil under repeated loading.The curve describing the granitic residual soil dynamic strength dependence of loading-number and the acceptable permanent strain is depicted.The variation of the dynamic characteristics with the change of the confining pressure,compacted factor and moisture content is discussed.As a result,the design principle of the subgrade through the dynamic characteristics is brought forward.



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