fatigue limit
- fatigue limit的基本解释
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疲乏强度, 疲劳极限, 疲劳限度
- 相似词
- 拼写相近词组、短语
- fatigue limit endurance strength
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Based on the system feedback archetype mode theory, the dissertation introduce the upper limit stepwise generation and elimination method of the system pullulate upper limit mode, construct the five upper limit archetype mode such as: market demand upper limit archetype mode, human resource upper limit archetype mode; fund upper limit archetype modes; technology innovation upper limit archetype mode; government support upper limit archetype mode ;By combining the five upper limit archetype mode ,we can attain a electronic information industry developmental pattern system upper limit archetype mode.
利用系统科学反馈基模分析理论,提出了系统成长上限模型上限逐步生成与消除法,通过构建江西电子信息产业市场需求成长上限子基模、人力资源不足成长上限子基模、政府支持有限成长上限子基模、资金不足成长上限子基模、创新能力不足成长上限子基模等5个基模,并对其做并运算,得到了江西电子信息产业系统成长上限基模,刻画了资金、市场、技术创新、人才与政府支持相互制约的关联关系。
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Base on the problem of large quantity fatigue loads on corroded R.C. structure and small quantity study of its mechanical property, bending resistance fatigue test of corroded R.C. beams is discussed in this paper. The influence of stress ratio and re-bar weight loss ratio on bending resistance fatigue performance of corroded R.C. beams are researched, and the relation between strains of corroded re-bars and fatigue life of beams are obtained. The main research contents and conclusions are as following: 1. Under the fatigue loads, the overstrain of concrete approximately coincidences three stages strain development and accumulation rule, and the mechanical property of concrete is deteriorated. The fatigue damage of concrete is accumulated. The overstrain of re-bars increases and the increase rate decreases.
鉴于实际工程中大量存在腐蚀钢筋混凝土结构承受反复荷载作用,但其力学性能研究不多的问题,本论文进行了锈蚀钢筋混凝土梁抗弯疲劳试验,研究了应力比和钢筋锈蚀率对锈蚀钢筋混凝土梁抗弯疲劳性能的影响,得出了锈蚀钢筋的应变与构件疲劳寿命之间的关系曲线,主要研究内容及结论如下:(1)在循环荷载下,混凝土残余变形基本符合三阶段变形规律,力学性能劣化,疲劳损伤积累。
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In addition, some experience formulas for them are regressed. The third chapter establishes a unified S-N curve equation to calculate multi-axial fatigue ultimate strength of concrete considering both the effect of confinement and minimum/maximum stress ratio, based on the triaxial fatigue test data in this paper and the test results under uniaxial and biaxial fatigue loading in previous literatures. Moreover, the consistency of calculating condition fatigue ultimate strength with fatigue life distribution and initial ultimate strength distribution is analyzed.
第二章简要地介绍了本文三轴疲劳试验装置,进行了两向等侧压约束下混凝土立方体试件三轴受压等幅和变幅疲劳试验,分析了三轴受压疲劳破坏机理,给出了相应的疲劳破坏试验判断标准;得到了混凝土在两向侧压约束下单级和多级受压疲劳的变形发展规律,包括最大纵向应变、残余应变、最大纵向应变率和疲劳变形模量等随循环次数的发展规律以及疲劳损伤的演变规律,并给出了相应的经验公式。
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fatigue strength:疲劳强度
变应力时的疲劳强度(fatigue strength)计算三、单向不稳定变应力时的疲劳强度(fatigue strength)计算四、双向稳定变应力时的疲劳强度(fatigue strength)计算五、提高机械零件疲劳强度(fatigue strength)的措施尽可能降低零件上的应力集中(stress concentration)的影响,
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Fatigue limit:疲劳极限
fatigue fracture 疲劳断裂 | fatigue limit 疲劳极限 | fatigue loading 疲劳荷载
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Fatigue limit:疲劳限度
fatigue 疲劳 | fatigue limit 疲劳限度 | fatigue test 疲劳试验