应力峰值 meaning in English
stress maximum
stress peak
Examples
- Analysis of peak stress in rice kernel during moisture absorption
稻谷吸湿过程中内部应力峰值分析 - Therefore one of efficiency means to solve cracking problem of runners is to change distribution of welding residual stress of blades , to decrease welding residual tensile stress in the dangerous area of blades or even turn to compressive stress
因此,改变叶片焊接残余应力的分布状态,降低叶片危险区域的焊接残余拉应力峰值,甚至将危险区域的拉应力转变为压应力,是解决转轮裂纹问题的有效途径之一。 - The numerical modeling results show that the smaller the elastic modulus of adhesive in fillet , the higher the peak stress in adhesive layer at the adjacent point to the fillet when hi - adhesives used to form the fillet and bondline respectively and is higher than that of the joint made of single adhesive
结果表明，当胶瘤采用不同于胶层的胶粘剂时，随着胶瘤弹性模量的减小，在胶层与胶瘤的连接处胶层中应力峰值显著提高，且均高于由单一胶所形成接头的应力峰值。 - Hydraulic pile hammer is one of the pile driving machines that drive prefabricated piles into the ground in the construction of pile foundation such as construction , bridge , dock , etc . with the development of science and technology , the prefabricated pile driving machines evolve from block hammer , steam - hammer , diesel hammer to hydraulic hammer . hydraulic pile hammer is one of ideal prefabricated pile driving machines because it can adjust stress waveform , decrease stress peak value , prolong effectual action when it drives piles . hydraulic pile hammer is used widely and formed series in developed countries now
液压打桩锤是用于建筑、桥梁、码头等桩基础施工中打入预制桩的桩工机械。随着科学技术的进步，预制桩施工机械由落锤、汽锤、柴油锤，发展到了液压打桩锤。用液压打桩锤打桩，可以调整撞击应力波波形，减小应力峰值，延长有效作用时间，是一种比较理想的预制桩施工机械，目前在发达国家已被广泛使用，并形成了系列化。 - The welding technology of francis turbine runners is optimized from the view of subsection welding and local heating by numerical simulation . the result shows that welding residual tensile stress appears in the weld and its area nearby , and peak stress appears in the dangerous area of blades after practising quondam welding technology ; welding residual tensile peak stress in the dangerous area of blades can be decreased by welding both ends earlier and then welding middle section later during subsection welding , and decreasing effect on welding residual stress of the subsection welding is related to the weld length of blade outlets and welding direction of each subsection ; decreasing effect on residual stress of the local heating is direct proportional to heating time , heating temperature , heating area , and inversely proportional to cooling area , and welding residual tensile peak stress in the dangerous area is decreasing trend earlier , and then increasing trend later with heated location increased
本文利用数值模拟手段对转轮的焊接工艺从分段焊和局部加热两个方面进行了优化,结果表明:采用普通工艺焊接时,叶片焊后残余拉应力出现在焊缝及其附近区域,并且在叶片出水边的熔合线附近(危险区域)出现了峰值;在采用优化的分段焊时,先焊两端后焊中间的方法可以降低叶片危险区域的焊接残余拉应力峰值,降低效果与叶片出水边焊段长度、焊缝各段的焊接方向有关;局部加热法降低转轮危险区域残余应力的效果主要与加热时间、加热温度以及加热面积成正比,与冷却面积成反比,并且危险区域的残余应力随加热区域的增大呈先降低后升高的趋势。