42CrMo轉(zhuǎn)向橫拉桿斷裂分析及優(yōu)化設(shè)計(jì)
發(fā)布時間:2018-04-14 07:51
本文選題:轉(zhuǎn)向橫拉桿 + 斷裂失效; 參考:《鍛壓技術(shù)》2015年12期
【摘要】:采用化學(xué)成分分析、硬度測試、斷口宏觀分析、微觀分析以及受力分析等方法,對斷裂的42CrMo轉(zhuǎn)向橫拉桿進(jìn)行失效分析。研究表明,轉(zhuǎn)向橫拉桿的失效原因?yàn)榻蛔冚d荷下的疲勞斷裂,導(dǎo)致疲勞斷裂的直接原因是橫拉桿局部應(yīng)力集中嚴(yán)重。應(yīng)用有限元分析軟件ANSYS Workbench,采用正交試驗(yàn)設(shè)計(jì)與方差分析方法,分析了結(jié)構(gòu)參數(shù)對應(yīng)力集中的影響,得出轉(zhuǎn)向橫拉桿的結(jié)構(gòu)落差尺寸A為引起應(yīng)力值偏大的主要因素,優(yōu)化后兩個區(qū)域的應(yīng)力值分別下降20.89%和13.72%。優(yōu)化結(jié)構(gòu)參數(shù)后的轉(zhuǎn)向橫拉桿批量生產(chǎn)后沒有出現(xiàn)之前斷裂現(xiàn)象,優(yōu)化效果顯著,滿足了生產(chǎn)使用要求。
[Abstract]:By means of chemical composition analysis, hardness test, fracture macro analysis, micro analysis and stress analysis, failure analysis of the broken 42CrMo steering bar is carried out.The research shows that the failure of steering bar is caused by fatigue fracture under alternating load, and the direct cause of fatigue fracture is the serious local stress concentration of the bar.By using the finite element analysis software ANSYS Workbench, the influence of structural parameters on stress concentration is analyzed by orthogonal test design and variance analysis method. It is concluded that the structural drop size A of the steering bar is the main factor causing the stress value to be larger.After optimization, the stress values of the two regions decreased by 20.89% and 13.72%, respectively.After the optimization of structural parameters, there is no pre-fracture phenomenon after mass production of the steering bar, and the optimization effect is remarkable, which meets the requirements of production and application.
【作者單位】: 江蘇財(cái)經(jīng)職業(yè)技術(shù)學(xué)院機(jī)電工程學(xué)院;南京林業(yè)大學(xué)機(jī)電工程學(xué)院;中國重型汽車集團(tuán)有限公司;
【基金】:國家自然科學(xué)基金資助項(xiàng)目(51375245) 淮安市科技支撐項(xiàng)目(SN13065)
【分類號】:U463.4;TG115
【共引文獻(xiàn)】
相關(guān)期刊論文 前10條
1 李新勇;趙志平;王芝燕;;高壓四通承載能力的分析研究[J];化工機(jī)械;2011年01期
2 李s,
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