fatigue lifetime 中文意思是什麼
fatigue lifetime
解釋
疲勞壽命-
In chapter 3, it introduces the fatigue failure of the axle. we analyze fatigue lifetime of the axle by the miner theory
第三章、驅動橋疲勞失效分析及其試驗技術研究本章著重對驅動橋的疲勞性能進行了分析。 -
Based on the study of strength degradation of material in the fatigue process, a strength degradation model is proposed. a stochastic differential equation, which controls strength degradation, is obtained from the model randomized by markov process. by using the theory of stochastic, the distributions of residual strength at any given lifetime and lifetime of any given residual strength are attained. under a few suitable hypotheses, inverse gaussian distribution of fatigue life is derived, and verified by means of experimental data. the result shows that the model and the method are reasonable
在研究疲勞過程中材料強度退化規律的基礎上，建立了一個強度退化模型.對其進行隨機化處理，得到控制強度退化過程的隨機微分方程.在一定假設條件下，獲得了剩餘強度概率密度函數的封閉解，並推導出疲勞壽命的反高斯分佈形式.給出一種考慮損傷狀態對隨機漲落影響的近似處理方法.與試驗數據的比較結果表明，本文的模型和方法是合理的 -
And the finite element method ( fem ) was used to simulate the stress and deformation of the outer casing and the bearing chock. on the basis of the experiments and fem analysis, the strength and fatigue lifetime, the interaction of creep and fatigue lifetime, the creep lifetime of outer casing and bearing chock have been analyzed, at the end of trail, sem analyses of failure section has been conducted
同時對航空發動機燃氣渦輪外機匣和軸承座進行了有限元模擬計算，得到外機匣和軸承座的焊接處的強度和變形情況的模擬結果。根據試驗數據和有限元的計算結果，對發動機燃燒室外機匣和軸承座兩種結構（包含焊縫）進行靜強度分析、疲勞壽命分析、蠕變壽命分析、蠕變疲勞交互作用壽命分析以及斷口的金相分析。 -
Prediction for intermediate and high cycle fatigue lifetime of notched metallic plates
含缺口金屬構件的中高周疲勞壽命預測 -
Fatigue experiments were performed to obtain the fatigue lifetime under the different loading. the parameters for law of the fatigue crack growth were obtained by crack growth experiments. in order to study the fatigue characteristics at high temperature, creep tests were also done
本文對多種典型焊接試件開展了諸多的試驗研究工作：進行單軸靜載拉伸試驗以確定構件的強度；進行疲勞壽命試驗以測得疲勞壽命曲線；進行疲勞裂紋擴展試驗以獲得試件的疲勞裂紋擴展規律paris公式；進行蠕變試驗以考察焊接試件疲勞持久特性；進行剩餘壽命試驗以獲得試件的剩餘壽命。 -
The relationship between resistance and fatigue damage has been studied and theoretical expressions have been obtained. based on the expressions and the data obtained from the fatigue experiment on 45 steel, a numerical model is deduced to estimate the fatigue accumulation of steel and pre - estimate the lifetime of steel. whether the resistivity changes or not, the theoretical calculation results is almost the same as the experiment results
在忽略電阻率變化和考慮電阻率變化的條件下，以針對最常見的45號鋼進行的高周疲勞試驗得到的結果為基礎，給出理論分析，建立了可以反映損傷累積和預測試件壽命的數值模型，並以此模型與前人所作的試驗進行比較，結果兩者吻合得很好。 -
Abstract : based on the study of strength degradation of material in the fatigue process, a strength degradation model is proposed. a stochastic differential equation, which controls strength degradation, is obtained from the model randomized by markov process. by using the theory of stochastic, the distributions of residual strength at any given lifetime and lifetime of any given residual strength are attained. under a few suitable hypotheses, inverse gaussian distribution of fatigue life is derived, and verified by means of experimental data. the result shows that the model and the method are reasonable
文摘:在研究疲勞過程中材料強度退化規律的基礎上，建立了一個強度退化模型.對其進行隨機化處理，得到控制強度退化過程的隨機微分方程.在一定假設條件下，獲得了剩餘強度概率密度函數的封閉解，並推導出疲勞壽命的反高斯分佈形式.給出一種考慮損傷狀態對隨機漲落影響的近似處理方法.與試驗數據的比較結果表明，本文的模型和方法是合理的 -
The application of fatigue failure criteria to low - cycle fatigue lifetime prediction of titanium alloy bt
9低周疲勞壽命估算中的應用 -
And finally, sem has been used to characterize the fracture. the results indicate that the relationship between the fatigue lifetime and cyclic plastic strain range obeys coffm - manson relation, and the relation between the hysteresis energy ( wn ) and the plastic strain range ( p ) can be described by a power - law : wh = h pw
但在室溫下， r向及t向試樣具有相同的循環特性，均表現為隨應變幅的不同而不同，當應變幅高於0 . 8時，呈現出先循環硬化而後循環軟化直至最後斷裂的現象。 -
The results show that : the strength and fatigue lifetime of the outer casing including welding line can satisfy the design requirement. although the some parts of bearing has been yielded, the strength at the weld is large enough for requirement. and welding defect, indicted by sem analyses of failure section, is main reason affecting fatigue lifetime
分析結果表明：外機匣（包含焊縫）強度和壽命滿足設計強度和壽命的要求；軸承座的強度已經進入屈服階段，而軸承座及其焊縫處的壽命卻是滿足設計壽命要求；另外斷口的金相分析表明焊接缺陷的存在是影響疲勞壽命的主要原因之一，故需提高焊接技術，減少焊接缺陷的存在以提高焊接結構的壽命。
分享友人