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1.
CALCULATIONSTOITSFATIGUEDAMAGEFRACTUREANDTOTALLIFEUNDERMANY-STAGELOADINGFORACRANKSHAFTCALCULATIONSTOITSFATIGUEDAMAGEFRACTUREA...  相似文献   

2.
HYDRAULICCALCULATIONANDMEASUREMENTOFFLOWFIELDWITHININLETPASSAGEOFLARGEPUMPINGSTATIONHYDRAULICCALCULATIONANDMEASUREMENTOFFLOWF...  相似文献   

3.
APPLICATIONOFMAGNETIZATIONVISCOUSCHARACTEROFMAGNETICFLUIDINELECTRO-HYDRAULICSERVOAMPLIFIERAPPLICATIONOFMAGNETIZATIONVISCOUSCH...  相似文献   

4.
STUDYONTESTINGTECHNIQUEFORMEASUREMENTOFFATIGUE-CREEPINTERACTIONRESISTANCESTUDYONTESTINGTECHNIQUEFORMEASUREMENTOFFATIGUE-CREEP...  相似文献   

5.
METALSURFACEMODIFICATION──RESEARCHOFBRUSHPLATINGTECHNOLOGYOFCrLAYERMETALSURFACEMODIFICATION──RESEARCHOFBRUSHPLATINGTECHNOLOGY...  相似文献   

6.
NEWFATIGUECUMULATIVEDAMAGEPROBABILISTICMODELOFTHEMECHANICALPARTSNEWFATIGUECUMULATIVEDAMAGEPROBABILISTICMODELOFTHEMECHANICALPA...  相似文献   

7.
NUMERICALANALYSISANDCOMPUTERSIMULATIONOFFORMATIONOFRESIDUALSTRESSESINGRINDINGPROCESS①HuHuananZhouZehuaChenChengzhouSouthChina...  相似文献   

8.
RESEARCHONCOMBINATIONANDPLANNINGOFPROCESSINGUNITSUNDERCIMSCONDITIONRESEARCHONCOMBINATIONANDPLANNINGOFPROCESSINGUNITSUNDERCIMS...  相似文献   

9.
IMPROVEMENTSONTHECONFIGURATIONANDOPTIMUMPARAMETERSOFHIGH一SPEEDTHRUSTBEARINGSIMPROVEMENTSONTHECONFIGURATIONANDOPTIMUMPARAMETER...  相似文献   

10.
REGULARITYOFVIBRATIONRESPONSEOFMECHANICALSYSTEMUNDERAFFECTOFVARI-FREQUENCYEXCITINGFORCEREGULARITYOFVIBRATIONRESPONSEOFMECHANI...  相似文献   

11.
基于有限元法的机械疲劳寿命预测方法的研究   总被引:1,自引:0,他引:1  
介绍了一种采用疲劳有限元分析软件MSC.FATIGUE来对结构件进行疲劳寿命预测的方法。以一阶梯轴为研究对象,在指定的载荷工况下,用有限元法分析了轴上的应力分布情况,并估算危险点处的疲劳寿命。该方法对设计制造过程中机械零部件的疲劳强度分析具有一定的参考价值。  相似文献   

12.
建立车架的有限元模型,利用Hypermesh软件对车架进行频率响应分析,得到车架结构的响应特性。在ADAMS/CAR软件中建立整车动力学模型,通过仿真获取车架与悬架连接处所受到的动态外载。运用疲劳分析软件MSC.FATIGUE ,选取有效的 S- N曲线,结合车架动力响应特性和多体动力学仿真结果,采用Dirlik疲劳评估模型计算出车架危险位置的疲劳寿命,为提高该车架的安全性提供了依据。  相似文献   

13.
多轴疲劳寿命工程预测方法   总被引:11,自引:1,他引:10  
介绍了一种预测受多轴交变载荷工程构件的低周疲劳寿命的方法。该方法以实例的应变计响应作为输入,通过一个循环塑性模型计算测量点的弹塑性应力应变分量,然后用多种多轴临界面疲劳损伤模型计算寿命。所发展的程序可处理一般的自由表面疲劳问题,它的应用通过分析一个典型的汽车零部件得到说明。  相似文献   

14.
基于传统汽车稳定杆疲劳可靠性设计偏于保守,造成疲劳设计缺乏科学依据、开发周期长、零件过于笨重、疲劳可靠性低等情况,提出将疲劳可靠性方法与疲劳有限元设计方法相结合,利用专业疲劳分析软件MSC.Fatigue,建立汽车稳定杆有限元模型,利用有限元方法计算其最小疲劳寿命和寿命分布,从而得到稳定杆的受力、危险部位、疲劳寿命等情况.稳定杆疲劳试验表明,预估结果与试验结果相吻合,为汽车稳定杆的材料选择、结构优化、疲劳设计提供了参考.  相似文献   

15.
Using the finite element code ANSYS/LS-DYNA, a dynamic finite element model with anelastic-linear-kinematic-hardening plastic material is established to analyze elastic-plastic stresses inthe railhead in the impact process of wheel and rail occurring at the gap of rail joint. The model isbased on the discrete elastic support condition of the rails, which is suitable for the actual situation ofwheel/track rolling contact. In the analysis the influences of axle load, yield stress and tangent modulus  相似文献   

16.
曾令云 《装备制造技术》2010,(3):124-125,127
简要介绍了分体式滚圈和有限元的相关理论以及分体式滚圈疲劳寿命的预测方法,对其疲劳磨损的原因作了详细分析,并阐述了有关的预防措施。  相似文献   

17.
基于改进的一次二阶矩法,利用线弹性随机有限元分析和局部应力应变法,考虑几何尺寸随机性进行转子叶片结构疲劳寿命可靠性的数值分析.根据榫头喉部关键尺寸的随机特性确定应力的统计特性,然后采用一种等概率方法,通过确定性数值计算得到叶片寿命的概率密度、均值和变异系数,讨论榫头喉部几何尺寸的随机性对危险点寿命可靠度的影响.  相似文献   

18.
The role of coefficient of friction (COF) on fretting fatigue damage prediction is studied using an elastic/plastic finite element analysis (FEA) of an experimental fretting fatigue test. At a scale on the order of tens of microns, the COF has a large impact on fretting fatigue damage prediction. By using a higher COF than that determined from conventional gross sliding tests, along with critical plane multiaxial fatigue damage models, the life and experimentally observed damage at this scale appear to be better predicted. Potential origins of this higher effective COF are discussed.  相似文献   

19.
In this study, the forging die life was investigated using fatigue life and wear quantity, which are generally considered for estimation of die life. The main aim is development of the equations to adapt finite element analysis to life estimation for a hot forging die. The Archard’s model was used to estimate the wear life of the die and Goodman’s and Gerber’s equations, using the stress-life method, were applied to estimation of the fatigue life. These techniques were applied to die life estimation for the hot forging die of a ball joint socket used in an autovehicle system. Rigid-plastic finite element analysis was first carried out for the forging process of the ball joint socket and then the elastic stress analysis was performed for the die in order to obtain fundamental data for the prediction of fatigue life. The die stress analysis requires the deforming loads of the workpiece to be translated into the contact loading of the die. In this case, the size of finite elements of the die and the workpiece is important for good interpolation of the loading. Therefore, the influence of element sizes on the interpolation results of the contact loading was also investigated. The wear volume of the die was measured using a 3-dimensional scanner of probe type. It was found that the measurement had a good agreement with the results of the finite element analysis for the die life estimation.  相似文献   

20.
介绍了如何用有限元法准确模拟钢制薄壁车轮弯曲疲劳试验的方法,着重讲述如何合理选择有限元网格类型、单元积分形式、单元尺寸大小,强调分析应采用材料“真应力-应变”曲线,给出旋转作用力、螺栓预紧力、加载时间步的设置方法和注意事项,以及判断有限元应力分析结果是否合理的方法。论文随后以车轮疲劳试验结果为参照,结合S-N曲线数学表达式,给出一种分析车轮疲劳寿命的简易方法,并基于这个简易方法去预测另一款大小相近、材料牌号相同的车轮寿命,发现寿命预测结果与试验结果较为接近,认为论文所介绍的应力和疲劳分析方法有较好的实用性。  相似文献   

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