1) limit yield stress
屈服极限应力
1.
The testing method of limit yield stress is suggested:the limit yield stress is equal to the deviatoric stress corresponding to the maximum water pressure of curve between deviatoric stress and water pressure.
试验结果表明,各向异性Biot系数在不同方向的变化趋势也不相同;利用水–岩石相互作用特征,提出一种新的确定岩体石屈服极限应力的方法,即以偏应力与水压力关系曲线水压力最大值所对应的偏应力为屈服极限应力。
2) PS (proof stress)
弹性极限应力,屈服点
3) yield stress
屈服极限
1.
Several issues such as the choosing of the modification plan, anti-jamming and measuring of the yield stress σs in the modification process of the testing system in the universal testing machine are discussed.
文章针对万能材料试验机测试系统技术改造过程中方案选择、抗干扰及屈服极限测定等问题,进行了分析研究,在分析2种技改方案特点的基础上,采用基于通用微机的技改方案,根据测量过程中干扰信号的特点,从硬件和软件两方面提出了相应的解决措施,针对典型的塑性材料(如低碳钢)有明显屈服现象的特点,给出了其屈服极限σs的算法,成功地捕捉了下屈服点。
4) yield limit
屈服极限
1.
A simple method of determinine the yield limit of material;
测定材料屈服极限的一种简易方法
2.
The strain distributions were measured,and the stress concentration and yield limit load and burst pressure were analyzed.
完成了一组管道修复结构的全尺寸爆破与疲劳实验,测量了修复结构中的应变分布,分析了应力集中、屈服极限压力和爆破压力等因素。
3.
Though the peak value of the stress in part areas exceeds the yield limit of the cast steel,as the yielding areas are small an.
线弹性及非线性分析结果表明,最不利工况下,部分节点局部区域的峰值应力有超过铸钢屈服极限的情况,但屈服区域范围小,同时最大应变值尚小。
5) limit of yielding
屈服极限
1.
Based on the relation between the incipient yield pressure and the limit of yielding in cylinder according to the elastic disabled rule, a laboratorial method of determining limit of yielding of material is designed and a set of experimental data were gained by the method.
基于厚壁圆筒的弹性失效准则所确定的圆筒的初始屈服压力与材料的屈服极限的关系,设计了一种测定材料屈服极限的实验方法,并测得了一组实验数据。
6) yield strength
屈服极限
1.
Based on the initial verification of the computer-simulation software for tensile fracture process of a B/Al composite,further simulation work was conducted in the present investigation to study the variation of the fracture behavior of the composite with different combinations of the matrix yield strength,σ_(ym) and the coefficient of variation in fiber streng- th distribution,CV.
在微机模拟 B/Al 型复合材料拉伸断裂过程软件系统已得到初步验证的基础上,进一步模拟研究了基体屈服极限σ_(ym)及纤维强度分布变动系数 CV 的不同组合条件下该材料的拉伸断裂行为。
2.
The uniaxial compressive strength σ m , yield strength Y , Youngs modulus E , and Poissons ratio ν have been obtained.
介绍了一种高能材料动静态变温三轴压缩试验装置,在熔点以下温度,通过对国产单质炸药TNT在中等应变速率(2-4/s)及准静态(3×10-3/s)条件下三轴压缩力学性能的测试,得出TNT的杨氏模量E、泊松比ν和屈服极限Y,以及当加载速率和温度改变时这些参数的变化规律。
3.
The EJMA standard has provide the equation for the yield strength at design temperature of bellows Sy, and the yield strength at room temperature of the actual bellows material in the annealed condition Sym in the equation shall be gained from the certified test report.
EJMA标准提供了波纹管材料在设计温度下的屈服极限Sy值的计算公式,但该公式中的从鉴定试验报告中获得的常温下退火态波纹管材料的屈服强度Sym值需要查找相关材料质保书才能得到,给设计带来许多的不确定性。
补充资料:屈服
屈服
yield
屈服yield在外加应力下,材料开始发生不可逆的范性变形的现象。连续加载过程中,应力不增加或开始有所降低而材料如能继续变形,这种材料便具有明显的屈服现象,此时材料所承受的恒定、最大或最小应力分别称为材料的屈服点(飞)、上屈服点(隽u)或下屈服点(asL)。低碳钢及其他含有少量填隙元素的体心立方金属等都具有明显的屈服点:而不锈钢、面心立方金属及密集六角结构金属则无明显的屈服点。对于没有明显屈服现象的材料,很难准确测定它们发生塑性流变的起始点,工程上一般取永久变形值达0.2%时所对应的应力值为该材料的屈服强度,以a02表示。 屈服现象与材料中位错的形成、增殖及运动有关。体心立方金属中位错受到钉扎,不易运动,而且位错的运动速率对应力不敏感,可滑移位错的形成便标志着范性形变的开始,因而具有明显的屈服点。而面心立方金属中位错的运动速率对应力非常敏感,原生位错在低应力下就能运功,使面心立方金属不存在明显的屈服点。 (李宗全)
说明:补充资料仅用于学习参考,请勿用于其它任何用途。
参考词条