本文關(guān)鍵詞： 再制造 傳動軸 臨界平面法 有限元分析 修正系數(shù) 壽命預(yù)測　出處：《蘭州理工大學(xué)》2012年碩士論文　論文類型：學(xué)位論文

【摘要】：由于能源日漸趨于緊張、氣候環(huán)境惡化的影響，低碳、環(huán)保、節(jié)能減排成為世界關(guān)注的話題。全球倡導(dǎo)低碳節(jié)能，我國承諾到2020年單位國內(nèi)生產(chǎn)總值二氧化碳排放比2005年下降40％至45％。隨著工業(yè)化、城鎮(zhèn)化步伐的加快，伴隨鐵礦石價格上漲、人口眾多、經(jīng)濟(jì)發(fā)展水平較低等實際現(xiàn)狀，我國要達(dá)到這一減排目標(biāo)面臨著巨大的壓力和挑戰(zhàn)。但也正是這樣的硬性約束指標(biāo)，推動了我國再制造行業(yè)的加速發(fā)展，促進(jìn)我國循環(huán)經(jīng)濟(jì)健康有序的可持續(xù)發(fā)展。作為再生資源利用的一種高級形式，再制造為發(fā)展循環(huán)經(jīng)濟(jì)、推動節(jié)能減排創(chuàng)造了條件，推動了機(jī)械行業(yè)的可持續(xù)發(fā)展。 再制造產(chǎn)品能否滿足下一個生命周期的使用，直接決定了再制造本身的價值及意義。因此再制造零、部件的壽命預(yù)測成為整個再制造工程中的一項技術(shù)難題。針對這一難題，本文圍繞再制造鏟運機(jī)傳動軸壽命評估展開研究： 本文利用PRO/E軟件下建立傳動軸三維模型，在ANSYS軟件Workbench環(huán)境下對該軸進(jìn)行彈塑性有限元分析，獲得危險部位的應(yīng)力應(yīng)變數(shù)據(jù)，再以坐標(biāo)變換原理建立并確定鏟運機(jī)傳動軸的臨界平面及臨界平面上關(guān)鍵損傷參量。根據(jù)升降法疲勞試驗結(jié)果，研究了材料42CrMo及其具有3Crl3電弧噴涂涂層的傳動軸疲勞行為（不同涂層厚度下傳動軸的扭轉(zhuǎn)疲勞極限），并提出采用修正系數(shù)來對高速電弧噴涂修復(fù)的再制造傳動軸實現(xiàn)壽命預(yù)測；主要以臨界平面法中的Brown-Miller多軸疲勞模型為例，采用修正系數(shù)對多軸疲勞模型改造，最后結(jié)合多軸疲勞參數(shù)、各損傷參量，在幾種多軸疲勞模型下對傳動軸新品和再制造傳動軸分別進(jìn)行壽命預(yù)測和分析。 在國內(nèi)外對再制造和多軸疲勞研究現(xiàn)狀的基礎(chǔ)上，本文對熱噴涂技術(shù)處理的再制造鏟運機(jī)傳動軸進(jìn)行壽命預(yù)測。以噴涂后零件疲勞極限為基礎(chǔ)，，研究并提出了一種經(jīng)修正系數(shù)改造多軸疲勞模型的方法。該修正法適用于各種“加材料”方法得到的再制造產(chǎn)品的壽命預(yù)測。同時為如何判斷該類再制造零、部件的疲勞壽命提供了可靠的理論數(shù)據(jù)支持。
[Abstract]:Because of the increasingly tense energy sources, the impact of the deterioration of the climate environment, low carbon, environmental protection, energy conservation and emission reduction has become a topic of concern in the world. China has promised to reduce its carbon dioxide emissions per unit of GDP by 40% to 45 percent by 2020 compared with 2005. With the acceleration of industrialization and urbanization, with the price of iron ore rising, China has a large population and a low level of economic development. China is facing great pressure and challenge to achieve this emission reduction target. However, it is precisely this kind of rigid constraint index that has promoted the accelerated development of China's remanufacturing industry. As an advanced form of utilization of renewable resources, remanufacturing has created conditions for the development of circular economy, energy saving and emission reduction, and promoted the sustainable development of machinery industry. Whether the remanufacturing product can satisfy the use of the next life cycle directly determines the value and significance of the remanufacturing itself. This paper focuses on the life evaluation of the transmission shaft of the remanufacturing LHD. In this paper, the three-dimensional model of transmission shaft is established by using PRO/E software. The elastic-plastic finite element analysis of the shaft is carried out under the environment of ANSYS software Workbench, and the stress-strain data of dangerous parts are obtained. Then the critical plane and critical damage parameters of the shaft of the scraper are established and determined by the coordinate transformation principle. According to the fatigue test results of the lifting method, The fatigue behavior of 42CrMo and its transmission shaft with 3Crl3 arc spraying coating was studied. The torsional fatigue limit of transmission shaft with different coating thickness was studied. The correction coefficient was proposed to predict the life of remanufactured transmission shaft repaired by high speed arc spraying. Taking the Brown-Miller multiaxial fatigue model in the critical plane method as an example, the modified coefficient is adopted to modify the multiaxial fatigue model. Finally, the damage parameters are combined with the multiaxial fatigue parameters. Life prediction and analysis of new and remanufactured drive shafts are carried out under several multiaxial fatigue models. On the basis of the research status of remanufacturing and multiaxial fatigue at home and abroad, this paper predicts the life of the driving shaft of the remanufacturing scraper treated by thermal spraying technology, which is based on the fatigue limit of the sprayed parts. This paper studies and proposes a modified method for modifying the multiaxial fatigue model. The modified method is applicable to the life prediction of the remanufactured products obtained by various "adding materials" methods. At the same time, how to judge the remanufacturing zero of this kind of products is proposed. The fatigue life of components provides reliable theoretical data support.
【學(xué)位授予單位】：蘭州理工大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2012
【分類號】：TH133.2

【參考文獻(xiàn)】

相關(guān)期刊論文 前10條

1 王雷,王德俊;多軸疲勞壽命預(yù)測及驗證[J];東北大學(xué)學(xué)報;2002年02期

2 郭立峰,李素芳,李衛(wèi),柳曉;超音速電弧噴涂技術(shù)在電廠設(shè)備延壽修復(fù)中的應(yīng)用[J];電力設(shè)備;2005年04期

3 徐濱士;;工程機(jī)械再制造及其關(guān)鍵技術(shù)[J];工程機(jī)械;2009年08期

4 許世文;董滿生;胡宗軍;牛忠榮;;42CrMo鋼疲勞試驗研究[J];合肥工業(yè)大學(xué)學(xué)報(自然科學(xué)版);2008年09期

5 周志革,黃文振,王德俊;多軸疲勞壽命預(yù)測模型的研究[J];機(jī)械設(shè)計與研究;1999年03期

6 趙少汴;多軸疲勞的應(yīng)變—壽命曲線[J];機(jī)械強(qiáng)度;1999年04期

7 陳建華;尚德廣;孫國芹;;多軸比例加載下鎳基合金GH4169試件的彈塑性有限元分析[J];機(jī)械強(qiáng)度;2007年04期

8 李靜;孫強(qiáng);李春旺;喬艷江;張忠平;;一種新的多軸疲勞壽命預(yù)測方法[J];機(jī)械工程學(xué)報;2009年09期

9 張忠平;李靜;張春山;劉京春;孫強(qiáng);;一種多軸疲勞壽命預(yù)測的統(tǒng)一模型[J];空軍工程大學(xué)學(xué)報(自然科學(xué)版);2007年04期

10 陳旭,高慶,孫訓(xùn)方,何國球,天津大學(xué)化工系;非比例載荷下多軸低周疲勞研究最新進(jìn)展[J];力學(xué)進(jìn)展;1997年03期

相關(guān)博士學(xué)位論文 前3條

1 徐楠;42CrMo鋼疲勞可靠性分析與裂紋萌生微觀機(jī)理研究[D];山東大學(xué);2006年

2 張國慶;零件剩余疲勞壽命預(yù)測方法與產(chǎn)品可再制造性評估研究[D];上海交通大學(xué);2007年

3 王濰;42CrMo鋼疲勞短裂紋演化行為及疲勞壽命預(yù)測的研究[D];山東大學(xué);2008年

相關(guān)碩士學(xué)位論文 前4條

1 陳建華;高溫缺口件多軸彈塑性有限元分析與壽命預(yù)測研究[D];北京工業(yè)大學(xué);2005年

2 倪明陽;卸船機(jī)減速箱軸轂應(yīng)力分析和疲勞壽命預(yù)測[D];吉林大學(xué);2009年

3 李健;汽車再制造工程及其部件再制造技術(shù)的研究[D];武漢理工大學(xué);2009年

4 程遠(yuǎn)存;W6Mo5Cr4V2鋼傳動軸強(qiáng)度與疲勞壽命分析[D];武漢理工大學(xué);2010年

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