本文選題：原位測試 + 拉-拉疲勞��； 參考：《吉林大學(xué)》2016年碩士論文

【摘要】：當(dāng)前,材料制品應(yīng)用廣泛,材料的疲勞性能研究受到更多的重視。相應(yīng),人們對材料疲勞測試方法也提出了更高要求�，F(xiàn)有疲勞測試方法大都是疲勞加載后的離位狀態(tài)下,對材料微觀組織形貌以及試件斷口進行分析來解釋其疲勞斷裂機理,將材料微觀組織形貌變化與宏觀斷裂失效建立動態(tài)聯(lián)系的材料力學(xué)性能原位測試方法(In Situ)卻研究甚少。針對目前國內(nèi)外材料疲勞測試裝置普遍存在的體積大、功能擴展能力差、兼容性差、價格昂貴等問題。本文基于材料原位測試技術(shù),研制了一套小型化壓電式中低頻原位疲勞測試裝置。本文開發(fā)的壓電式中低頻原位疲勞測試裝置,具有較強的功能擴展能力和熱電磁穩(wěn)定性,與顯微測試設(shè)備集成,能實現(xiàn)原位觀測模式下中低頻拉-拉疲勞加載,實時動態(tài)評價材料的疲勞斷裂失效機理。本文主要工作內(nèi)容如下:(1)通過對目前國內(nèi)外疲勞測試裝置的研究分析,研制了一套具有原位觀測功能的疲勞測試裝置,完成關(guān)鍵零部件設(shè)計,并在滿足測試功能的前提下,對傳感器、壓電疊堆等優(yōu)化選擇,最終完成了裝置制造和裝配。(2)利用有限元分析軟件ANSYS WORKBENCH分別對測試裝置關(guān)鍵柔性鉸鏈、裝置整機、以及試件開展有限元仿真分析,驗證柔性鉸鏈以及整機的靜、動態(tài)使用安全合理性并預(yù)測材料在不同疲勞工況下的疲勞壽命。(3)實現(xiàn)裝置機械結(jié)構(gòu)部分與電控部分的集成和調(diào)試,完成對力傳感器和位移傳感器的線性度測試和標定;完成因裝置機架變形導(dǎo)致的力傳感器和位移傳感器結(jié)果參數(shù)誤差的修正,并測試裝置最終的靜、動態(tài)輸出性能。(4)使用本裝置開展化學(xué)腐蝕下AZ41M變形鎂合金原位拉-拉疲勞試驗,探究材料在疲勞過程中的微觀組織變化規(guī)律;開展不同類型缺口下1060鋁的原位疲勞試驗,探究疲勞工況下材料對缺口的敏感性;開展表面預(yù)制壓痕缺陷下1:2型銅鋼(H62黃銅-304不銹鋼)復(fù)合材料常溫下的原位疲勞試驗并集成加熱單元開展此類材料的熱-疲勞耦合試驗研究,探究溫度對材料疲勞性能的影響。
[Abstract]:At present, materials and products are widely used, and more attention has been paid to the fatigue properties of materials. Accordingly, people also put forward higher request to material fatigue test method. In order to explain the fatigue fracture mechanism, most of the existing fatigue testing methods are based on the analysis of the microstructure and fracture surface of the material after fatigue loading. However, there is little research on in-situ testing method for mechanical properties of materials, which establishes dynamic relation between microstructure and macroscopic fracture failure. Aiming at the problems of large volume, poor function expansion ability, poor compatibility and high price, the domestic and foreign material fatigue testing devices are widely existed at present. Based on the in-situ testing technique, a miniaturized piezoelectric in-situ fatigue testing device for middle and low frequency was developed. The piezoelectric in-situ fatigue testing device with middle and low frequency is developed in this paper. It has strong functional expansion ability and thermal electromagnetic stability. It can be integrated with the micro-test equipment to realize the mid-low frequency tension and tension fatigue loading in in-situ observation mode. Real-time dynamic evaluation of fatigue failure mechanism of materials. The main work of this paper is as follows: (1) based on the research and analysis of domestic and foreign fatigue testing devices, a fatigue testing device with in-situ observation function has been developed to complete the design of key parts and components, and under the premise of satisfying the testing function, Finally, the fabrication and assembly of the device are finished. The finite element analysis software ANSYS WORKBENCH is used to simulate the key flexure hinge of the testing device, the whole device, and the test piece, respectively. To verify the safety and rationality of the flexible hinge and the static and dynamic use of the whole machine, and to predict the fatigue life of the material under different fatigue conditions, and to realize the integration and debugging of the mechanical structure part and the electronic control part of the device. The linearity of force sensor and displacement sensor is tested and calibrated, the error correction of the result parameter of force sensor and displacement sensor caused by the deformation of the frame of the device is completed, and the final static of the device is tested. Dynamic output performance. (4) using this device to carry out in-situ tensile and tensile fatigue tests of AZ41M wrought magnesium alloys under chemical corrosion, to explore the change of microstructure of materials during fatigue, and to carry out in-situ fatigue tests of 1060 aluminum under different types of notches. To explore the sensitivity of material to notch under fatigue condition; In-situ fatigue tests of 1:2 copper steel H62 brass 304 stainless steel composites with surface prefabricated indentation defects were carried out at room temperature. The thermal-fatigue coupling tests of these materials were carried out with an integrated heating unit to investigate the effect of temperature on the fatigue properties of the materials.
【學(xué)位授予單位】：吉林大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2016
【分類號】：TH871.3

【參考文獻】

相關(guān)期刊論文 前10條

1 Zhi-Dong Fan;Dong Wang;Lang-Hong Lou;;Corporate Effects of Temperature and Strain Range on the Low Cycle Fatigue Life of a Single-Crystal Superalloy DD10[J];Acta Metallurgica Sinica(English Letters);2015年02期

2 劉儉輝;王生楠;韋堯兵;牟偉杰;;304不銹鋼低周疲勞斷裂特性的研究[J];航空制造技術(shù);2013年17期

3 張紅霞;吳廣賀;閆志峰;裴飛飛;李晉永;王文先;李永蓮;;5A06鋁合金及其焊接接頭的疲勞斷裂行為[J];中國有色金屬學(xué)報;2013年02期

4 陳煜;孫寧;李宏周;賈曉雯;;原位加載掃描電鏡技術(shù)及應(yīng)用[J];化工新型材料;2012年02期

5 胡燕慧;鐘群鵬;張崢;韓邦成;;超聲振動載荷下S06鋼的長壽命疲勞性能[J];北京航空航天大學(xué)學(xué)報;2010年04期

6 朱琳;;掃描電子顯微鏡及其在材料科學(xué)中的應(yīng)用[J];吉林化工學(xué)院學(xué)報;2007年02期

7 蘇才鈞,吳昊,郭占社,孟永鋼,溫詩鑄;微構(gòu)件材料力學(xué)性能測試方法[J];實驗力學(xué);2005年03期

8 方岱寧,毛貫中,李法新,馮雪,萬永平,李長青,江冰,劉彬,邴歧大;功能材料的力、電、磁耦合行為的實驗研究[J];機械強度;2005年02期

9 楊富民,孫曉峰,管恒榮,胡壯麒;K40S鈷基高溫合金的高溫低周疲勞行為 Ⅱ.疲勞斷口分析[J];金屬學(xué)報;2002年10期

10 王清遠;超聲加速疲勞實驗研究[J];四川大學(xué)學(xué)報(工程科學(xué)版);2002年03期

相關(guān)博士學(xué)位論文 前2條

1 馬志超;塊體材料原位拉伸—疲勞測試理論與試驗研究[D];吉林大學(xué);2013年

2 趙沛;超磁致伸縮材料力磁耦合特性實驗研究[D];蘭州大學(xué);2012年

相關(guān)碩士學(xué)位論文 前3條

1 李秦超;中低頻材料微觀力學(xué)性能原位拉伸測試儀設(shè)計與試驗研究[D];吉林大學(xué);2012年

2 周琴;AFM原位拉伸試驗裝置研制及試驗研究[D];哈爾濱工業(yè)大學(xué);2008年

3 施翔晶;A4鋁合金鍛件腐蝕環(huán)境低周疲勞性能試驗研究[D];南昌大學(xué);2007年

，

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