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stress grading
相关语句
  应力分级
     VARIATIONS IN DENSITY AND STRENGTH OF WOOD OF KORAIAN PINE AND LARCH FROM NORTHEAST OF CHINA AND THE LUMBER STRESS GRADING
     东北红松、落叶松木材密度和强度的变异及其木材应力分级
短句来源
  应力控制
     Simulative calculation and test validation of the electric field round stress grading bushing optimized by nonlinear dielectric
     非线性电介质改善应力控制型套管电场的模拟计算与试验分析
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  “stress grading”译为未确定词的双语例句
     The Study on Stress Grading for Pinus Sylvestris Var. Mogonica Based on Transverse Vibration Method
     基于横向振动法对樟子松木材进行应力分等的研究
短句来源
     Application study of corona protection and stress grading tape for resin rich insulation system
     一次成型防晕技术在多胶模压绝缘系统中的应用研究
  相似匹配句对
     The initial geological stress of loess was simulated by grading fill;
     主要内容包括采用分级堆填过程模拟风积黄土层的初始应力场 ;
短句来源
     and decentralization of the stress.
     要减少应力集中。
短句来源
     On grading of journals
     期刊等级评定反思
短句来源
     stress concentration;
     应力集中;
短句来源
     Stress-strain Behavior and Constitutive Models for Wide Grading of Gravelly Soil
     宽级配砾石土的应力路径试验及其本构模型验证
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  stress grading
Accordingly, mechano-sorptive creep susceptibility also correlated continuously with elastic compliance; thus encouraging the possibility of the selection of non-susceptible material by machine stress grading.
      
This report deals with the mechanical stress grading of tropical timber regardless of species.
      
Mechanical stress grading of tropical timbers without regard to species
      
In this instance stiffness profiles were obtained from butt to upper-top logs, based on machine stress grading of all boards and then averaging values from the 62 trees.
      
Three variants of a frequency domain method were selected for further evaluation with the objective of improving the timber stress grading process.
      
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Pinus koraiensis, Larix gmelini and Larix olgensis are the species of the most important timber in northeast of China. The sample trees of the three softwoods for density and maximum crushing strength test are collected from the various sample plots through out the range of their natural distribution. Some of them had been collected and tested in the fifties, and some sample trees were complemented and tested late. The experimental results of wood are shown in this paper to study the variations in density and...

Pinus koraiensis, Larix gmelini and Larix olgensis are the species of the most important timber in northeast of China. The sample trees of the three softwoods for density and maximum crushing strength test are collected from the various sample plots through out the range of their natural distribution. Some of them had been collected and tested in the fifties, and some sample trees were complemented and tested late. The experimental results of wood are shown in this paper to study the variations in density and strength that may occur not only among the different localities but also among trees within a locality and within a tree.The variations in density and strength of each kind of wood are clearly shown in this research, and thus a reliable representative value (species mean and total variance of wood density and strength.) could be determinated respectively. In addition, the lumber stress grading and grade stresses or characteristic value are derived by different methods in this paper for the structural timber.

本文研究了东北红松、落叶松和黄花落叶松的木材密度和顺纹抗压强度的变异。供试验用的试材,是按照这些树种的分布,选择了各种有代表性的地区采集而来。试验数据采用方差分析方法,分别树种比较不同地区间的材性,以及在同一地区内的树株间和一株树内部木材性质的变异。研究结果清楚地表明了每种木材性质变异的特点。据此可以确定该种木材的密度和顺纹抗压强度的代表值,即树种平均值及标准差。本文并讨论了这三种木材用于木结构承重构件的应力分级方法,和木材设计应力不同表达方式及推导。

The finite element method was employed to study the micromechanics in rubber toughened epoxy resins using the axisymmetric model contained a rubber and a hole. The distribution of the Von Mises equivalent stress of a rubber contained model was similar to that of a hole contained model. It showed that very high stress grade in the 45° field above the equator in the epoxy matrix interface. The rubber debonded from the epoxy matrix in the field and the stress in the rubber can ignore. Therefor...

The finite element method was employed to study the micromechanics in rubber toughened epoxy resins using the axisymmetric model contained a rubber and a hole. The distribution of the Von Mises equivalent stress of a rubber contained model was similar to that of a hole contained model. It showed that very high stress grade in the 45° field above the equator in the epoxy matrix interface. The rubber debonded from the epoxy matrix in the field and the stress in the rubber can ignore. Therefor the toughening mechanics model was simplified with the hole replacing the rubber in the epoxy matrix.

使用包含一个橡胶和空穴的轴对称模型的有限元计算来分析橡胶增韧环氧树脂细观上的力学行为。包含橡胶颗粒模型的 Von Mises等效应力分布与包含空穴模型的相似 ,且在赤道以上 4 5°范围内界面处环氧一侧有相当大的应力梯度 ,橡胶在此脱落。橡胶颗粒内的应力分布均可忽略不计。故空穴取代橡胶颗粒可简化橡胶增韧环氧树脂增韧力学模型

Uniaxial direct tensile experiments were carried out to obtain tensile strength of self stressing concrete reinforced with steel bar and fiber. Parameters of experiments included three self stressing grades, three contents of steel fiber and four reinforcing ratios. It is concluded that tensile strength of self stressing concrete restrained by both steel fibers and reinforced steel bars is significantly increased. Formulas are suggested by statistic analysis.

通过直接拉伸试验 ,测量了配筋钢纤维自应力混凝土的抗拉强度 .试验参数包括 3个自应力等级、3个纤维体积率、4种配筋率 .试验结果表明 ,在钢筋和钢纤维联合作用下 ,自应力混凝土的抗拉强度得到明显的提高 ,并由统计分析给出了配筋钢纤维自应力混凝土的抗拉强度计算公式 .

 
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