查询词典 proof stress

Based upon the experimental results, including threshold values under static loading,the effects of alternating loading and room temperature creep,as well as metallographic observations of the fractography,it is concluded that notwithstanding stress corrosion or corrosion fatigue in aqua ammoniae,or fatigue in air,the cracks always initiate at the site subject to maximum normal stress(θ=-110°)along the notched surface,and then propagate along the maximum shear stress direction from that site(α=-35°).

由门槛值的测量、交变载荷的作用、室温蠕变的影响、断裂过程的金相观察及断口形貌等结果，可以确认；黄铜不论是在氨水中应力腐蚀或腐蚀疲劳，还是在空气中疲劳，裂纹都从Ⅱ型缺口试样的最大正应力处(0=-110°)萌生，并沿该处的最大剪应力方向(α=-35°)扩展。

5A kind of stress-relief groove of box thread joint has been developped. Finite Element models of several thread joints have been established by ABAQUS. The Morrow Strain-life Model is used to evaluate the fatigue life of 3 kinds of connections with different stress-relieaf grooves of box. The results show that the fatigue life of box with stress-relief groove developed in the paper is the longest.

为了定量评价几种螺纹接头的疲劳寿命大小，采用Morrow应变周期模型结合有限元分析结果计算3种具有内螺纹应力减轻槽母扣的疲劳寿命，计算结果表明本文设计的内螺纹应力减轻槽能显著延长母扣的疲劳寿命。

The mechanical effect of the crack initiation and propagation under a residual stress field is analyzed, and then the residual stress redistribution because of cracking in the welded residual stress field in a plate butt welded joint is successfully calculated by means of the elasto-plastic finite element method .

分析了在残余应力场中裂纹产生和扩展所引起的力学效应，并成功地运用弹塑性有限元方法计算了平板对接接头焊接残余应力场中裂纹扩展引起残余应力的变化。

A APDL program is developed for analyzing the contact stress of journal bearing pair of roller cone bit. The 25 contact stress cases of different clearance fit(including clearance of large bearing is bigger, equal to and smaller than that of small bearing) journal bearing pair of the 8 1/2XXX roller cone bit are analyzed. The result is that the maximum contact stress is less when the clearance of large journal bearing pair is smaller than or equal to that of small journal bearing pair.

用参数化设计语言APDL编制了牙轮钻头滑动轴承的ANSYS接触有限元分析程序，根据钻头制造厂方提供的某8 1/2的轴承配合间隙尺寸，分三种不同的间隙配合（大轴间隙大于小轴间隙、大轴间隙等于小轴间隙、大轴间隙小于小轴间隙），共25种情况，对轴承的表面的接触应力进行了分析，得出：大轴间隙小于等于小轴间隙时最大应力比较小。

An application of conjugate gradient method to fit concrete creep coefficient is in good agreement with experimental results. 4. There are 8 CFST members bearing capacity tests with different initial stress factor and eccentric distances having been launched. 5. A generalized analysis program which could be considered steel tube initial stress influence of CFST arch bridge is developed. The correct and accuracy of the program were verified by the experimental results of the axis, eccentric compression initial stress CFST member and a model of CFST arch bridge.

应用共轭斜量法拟合混凝土徐变系数，拟合结果与试验值吻合良好； 4、开展了8根不同初应力系数和偏心距的钢管混凝土初应力构件承载力试验； 5、编制了钢管混凝土拱桥考虑钢管初应力影响的综合分析程序，程序得到轴心受压、偏心受压初应力试验构件和模型拱桥的验证。

The entrance section of FuXi Double-arched Tunnel is modeled in the fact of factual shallow buried and unsymmetrical pressure condition. Adopting the three heading construction method to simulate twelve kinds of construction projects, confirm reasonable construction orders and left and right tunnel face interval, systematically analyze and research the changing law of the tunnel deformation and surrounding rock stress in soft and cracked condition of surrounding rock,bring forward pertinent advices against construction disease; Build the deep buried tunnel model in middle section of tunnel , separately adopt the central heading bench cut benching method and the central heading full cross method to simulate ten kinds of construction projects, establish the reasonable construction orders, sidestep length and tunnel face interval, which are due to the deep buried tunnel, systematically analyze and research the change law of the tunnel deformation and surrounding rock stress in the section with good surrounding rock condition, bring forward the reasonable construction projects which can make sure of construction safety and save construction time; Because the central wall is disturbed many times during constructing process, its displacement and stress distribution is very complex.

富溪隧道进口段依照实际的浅埋偏压状况建立模型，采用三导洞法开挖模拟了12种方案，确定了合理的施工顺序和左右主洞掌子面错距，系统地分析研究了软弱破碎围岩浅埋偏压段施工的隧道变形和围岩应力变化规律，提出了防止施工病害的针对性建议；洞身段按深埋隧道建立模型，分别采用中导洞台阶法和中导洞全断面法模拟了10种方案，确立了适合深埋隧道的合理施工顺序、台阶长度和掌子面错距，系统分析研究了围岩较好深埋段施工的隧道变形和围岩应力变化规律，提出了兼顾施工安全和节省工期的合理施工方案；由于受到多次扰动，中隔墙的位移和应力变化规律较为复杂，通过对各种方案的对比分析，得出了中隔墙在施工不同阶段的位移变化规律、应力变化规律和应力分布规律，尤其对于浅埋偏压段隧道施工时中隔墙位移和应力变化规律做了深入研究，提出了合理的施工建议。

The calculation results show that the initial geostress field in dam zone is a medium to high stress field composed of tectonic stress and dead-weight stress.

计算结果表明，大岗山坝区初始地应力场是一个在浅部以构造应力为主、在深部以自重应力为主、由构造应力和自重应力联合组成的中等偏高的地应力场，研究结果为坝区边坡开挖及长期稳定性分析提供了重要依据。

The calculation results show that the initial geostress field in dam zone is a medium to high stress field composed of tectonic stress and dead-weight stress.

通过多元回归三维数值计算，求得地应力最优回归系数，较为准确地反演了大岗山坝区的初始地应力场。

The paper analyzed the residual stress in the machine frame of drying part of the high speed paper machine caused by welding, discussed the effect of welding parameters on the residual stress and compared the mechanisms and efficiencies of eliminating the weld stress by heat treatment and aged-vibrating processes.

对高速纸机干燥部机架焊接所产生的残余应力进行了分析，指出了焊接工艺参数对残余应力的影响；分析比较了热处理和振动时效两种工艺方法消除焊接残余应力的机理和效果。

The paper analyzed the residual stress in the machine frame of drying part of the high speed paper machine caused by welding, discussed the effect of welding parameters on the residual stress and compared the mechanisms and efficiencies of eliminating the weld stress by heat treatment and aged-vibrating processes.

摘 要：对高速纸机干燥部机架焊接所产生的残余应力进行了分析，指出了焊接工艺参数对残余应力的影响；分析比较了热处理和振动时效两种工艺方法消除焊接残余应力的机理和效果。

Nowadays, most of research are to build a transmutative Petri Nets through adding controlling place sets, controlling arc sets and controlling policy to the basic Petri Nets, while the Controlled Petri Nets could be used to argue many controlling theory problems conveniently and to induce many logically and physically supervisory and solve the Event Feedback Controlling Problems and State Feedback Controlling Problem in DEDS supervisory theory.

目前大多数的研究表现为在变形后的受控Petri网基础上，利用各种方法求得各种逻辑型、结构型控制器，解决DEDS监控理论中的事件反馈控制问题与状态反馈控制问题。

On one hand, there are discussions with the works council and union about extension of short time working up to the end of September.

一方面，有讨论，工程理事会和联盟关于延长工作时间短至9月底。