fatigue life cycle 中文意思是什麼
fatigue life cycle
解釋
疲勞循環次數-
First, the theory of fretting wear and studies on fretting fatigue were introduced and the parametric method was used in the process of creating the model of dovetail joints in ug software. the elastic contact problem is analyzed in finite element method ( fem ) and is used to the parameters " distribution and contact stress of the joint are obtained on the base of ansys code. with the effect factor of load frequency, the prediction method of fretting fatigue life of dovetail joint under low and high / low cycle complex load is proposed
本文介紹了微動損傷的機理和微動疲勞壽命的研究方法；利用ug軟體對燕尾榫聯接結構創建了參數化實體模型；基於ansys軟體平臺求解彈性接觸問題，獲得了榫聯接結構接觸應力及接觸狀態量的分佈；在已有微動疲勞壽命預測模型的基礎上，引入載荷頻率影響因子，對低周、高低周復合載荷作用下的燕尾榫聯接結構進行了微動疲勞壽命的預測，與試驗結果對比表明採用本文提出的方法預測榫聯接結構的微動疲勞壽命是有效的。 -
For rotor steel ( 30crlmolv steel ), the tests of low - cycle fatigue property are done under different temperatures. the fatigue life under different temperatures is researched to make up for the defects of the testing for foreign similar materials. when pull - stretch data is attempted to evaluate low - cycle fatigue data, the result shows that four - point associated method in middle - low life zone is done well under room temperature, but there are large errors of four - point associated method and general - slope method under other temperatures
在本文中，通過與國外同類材料的性能進行比較，國產材料與國外材料共有的材料特徵基本相同；對轉子鋼（ 30crlmolv鋼）進行了不同溫度下的低周疲勞性能實驗，研究其在不同溫度下疲勞壽命，以彌補國外對同類鋼材測試的不足；採用拉伸數據預測低周疲勞壽命時發現，室溫條件下用四點關聯法在中低壽命區預測較好，在高溫條件下四點關聯法和通用斜率法都有較大誤差，需要進行改進。 -
Safety of structures is a common and important problem in the mechanical engineering. recent years there is a trend of developing unified theory of fatigue and fracture to describe the life - cycle damage behaviour of structures. researches on safety guarantee are going toward multi - method synthesis, system micromation, network availability and life - cycle information management
結構的安全性一直是工程中普遍關心的重要問題，結構強度學逐漸發展到疲勞斷裂統一理論，結構安全保障手段已向多方法、微小化、網路化和全壽命在線保障與監測發展，建立全壽命安全保障系統，涉及材料、機械、力學、電子等學科的交叉融合。 -
Accounting for creep and stress relaxation, a long - term life and low cycle fatigue life prediction method for gas turbine engine hot section is established
摘要建立了考慮蠕變和應力鬆弛的航空發動機渦輪葉片等高溫構件的持久壽命和低循環疲勞壽命預測方法。 -
In this paper, the high - temperature low - cycle fatigue life and fatigue crack propagation life tests are carried on the cylindrical axial symmetry specimens having precrack or non - precrack with different types of notches of 16mnr steel in common use in the petrochemical industry contacting coke drum equipment, the stress / strain and the range of stress / strain of dangerous points are received through stress analysis of the specimens using finite element program under multi - axial stress state. at last, the equations of evaluating the high - temperature low - cycle fatigue life and the fatigue crack propagation life are found through using the least - square regression method
本文採用無預裂紋和帶預裂紋環狀缺口圓柱形試樣，進行了石化焦炭塔設備常用材料16mnr多維應力狀態下不同缺口形式的高溫低周疲勞總壽命試驗及裂紋擴展壽命試驗，並利用有限元程序對試樣缺口周圍及裂紋尖端附近進行了軸對稱多維應力狀態下的應力、應變場分析，來評價材料不同條件下的高溫低周疲勞總壽命和裂紋擴展壽命，最後利用最小二乘回歸方法，得到了該材料高溫低周疲勞總壽命和裂紋擴展壽命評價方程。 -
Based on the experimental data of rotor steel 1crmov in the loading of low - cycle fatigue at high temperature, the strength behavior and the fatigue life curve of this material at 550 have been achieved. meanwhile, with respect to three kinds of notched bar, their material damage assessment method under multiaxial stress condition is discussed
本文在1crmov材料的高溫低周疲勞實驗數據進行了整理和統計的基礎上，得到了材料的疲勞強度特性曲線和疲勞壽命曲線，同時對三種不同缺口形式的圓柱形試件進行了多軸應力狀態下的材料損傷的研究，並通過數值計算方法進行了疲勞壽命評估。 -
This paper analyses the engineering feasibility of using the static fem in the fatigue strength design of the shipunloaders structure through discussing the difference of infinite fatigue life design and finite fatigue life design and puts forward the calculating work cycle of this structure after considering the shipunloaders work process. it is useful for crane design - engineer to introduce the general fatigue strength design processes of the shipunloaders
分析了有限壽命疲勞設計和無限疲勞壽命設計的異同，研究了用靜力學的有限元法進行結構的疲勞強度設計的技術可行性問題；並結合裝卸橋的工作過程，提出了相應的計算工作循環；介紹了裝卸橋疲勞設計的一般步驟 -
These stud " can be concluded as following : on the basis of the bhw - 35 steel p - s - n curve and its da ' dn growth law the method of low - cycle fatigue life evaluation of 401 t / h boiler was proposed. and a mechanics model was suggested for calculating the stress of internal pressure suffering elbow. with the elbow fatigue test, a method of evaluation the fatigue growth life of pressure suffering elbow is recommended ; and the elementary use of damage mechanics on the fatigue life evaluation of the boiler drum
本文創新點為：在bhw - 35鋼的p ? s ? n曲線及da / dn擴展規律的試驗研究基礎上，提出了410t / h鍋爐汽包的低周疲勞壽命分析與預測方法；建立了一種橢圓截面變厚度彎管承受內壓時的應力計算力學模型，通過壓力彎管的疲勞試驗，本文推薦其低周疲勞擴展壽命預測方法；將損傷力學應用到鍋爐汽包疲勞壽命預測做了初步的探索。 -
Specimens ’ cracking load under dead - load, fatigue failure characteristic, fatigue life, deflection of span - centre, fatigue flexural rigidity, maximal crack width, development of cracks and strain of concrete and steel bars have been investigated. the influence of fatigue cycle characteristic, ratio of reinforcement, kinds of aggregate and concrete compressive strength on the specimens ’ fatigue behavior has been also investigated
對試件的靜載下開裂荷載、疲勞破壞特徵、疲勞壽命、疲勞荷載作用下的跨中撓度、截面疲勞抗彎剛度、裂縫開展情況及最大裂縫寬度、鋼筋及混凝土在循環荷載作用下應變等內容進行了研究，分析了疲勞循環特徵值、縱筋配筋率、骨料種類、混凝土抗壓強度等因素對試件疲勞性能的影響。 -
In fatigue tests, the fatigue test was paused whenever fatigue life cycle was reached to 1500, then similar gradual cyclic experiment was re tried, the displacement distribution around the hole and the strains at the side of hole were measured
在疲勞試驗過程中，每當疲勞循環1500次就停機，進行同樣的緩慢循環實驗，並測量出孔周的位移場及孔邊應變。 -
On the basis of all these research, the method of low - cycle fatigue life analysis and estimation for 4 lot / h boiler drum was set up
在上述研究的基礎上，建立了410t / h鍋爐汽包的低周疲勞壽命分析與預測的方法。 -
The long - term life and low cycle fatigue life of low pressure turbine blade for an aeroengine under real loading spectrum is analyzed by using this method
用該方法對某型發動機低壓渦輪工作葉片在實際飛行載荷譜作用下的持久壽命和低循環疲勞壽命進行了分析。 -
Discussion of the evaluating criterion of 400 low cycle fatigue life under multiaxial stress states
低周疲勞壽命評價準則的探討 -
The abilities of resisting the incubation of fatigue crack in ast101a and alti101a were tested with the high - cycle fatigue method. a method combining the maximum likelihood estimation method with the correlation coefficient method was suggested to analyze the fatigue life experimental data some of which were incomplete. the s - n curve and p - s - n curves were presented, and the influence of the loading history and the defects in specimen on fatigue life was discussed
通過高周疲勞測試方法研究了ast101a和alti101a抵抗疲勞裂紋萌生的性能，把最大似然法和相關系數法結合起來處理不完全疲勞壽命數據，給出了ast101a的s ? n曲線、 p ? s ? n曲線和疲勞極限，討論了加載歷史、缺陷等對疲勞壽命的影響。 -
Low - cycle fatigue life prediction under multiaxial non - proportional loads
多軸非比例加載低周疲勞壽命預測方法的研究 -
Multiaxial low cycle fatigue life prediction model based on plastic energy
基於塑性應變能的多軸低周疲勞壽命預測模型 -
It is very important to study the correlation of cyclical strain on the side of hole with fatigue life cycle for understanding the material damage and micro - crack initiation, and for preventing macro - crack initiation and propagation
研究孔邊循環應變與疲勞循環次數的相關性，對于研究材料損傷及微裂紋的產生，預防宏觀裂紋的產生及擴展具有十分重要的意義。 -
The stress analysis and the fatigue life loss calculation of steam drum are carried out in this article. a simplification formula is proponed to calculate the main stress and is used in configuration of dcs. the rain - flow method is used to count the fatigue cycle, which can satisfy the need of on - line monitoring
本文對其進行了應力分析和疲勞壽命損耗的計算，並提出主應力計算的簡化公式用於dcs組態，採用雨流法作為在線計算的疲勞計數方法，滿足了壽命損耗在線監測的要求。 -
New low cycle fatigue life criterion under nonproportional loading based on critical plane methods
新的非比例加載低周疲勞壽命估算方法 -
On fatigue life in very high cycle range 107 109 of chinese ly12 aluminum alloy
12合金的超高周疲勞性能研究
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