期刊文献+
共找到1,037篇文章
< 1 2 52 >
每页显示 20 50 100
Finite element analysis of contact fatigue and bending fatigue of a theoretical assembling straight bevel gear pair 被引量:15
1
作者 邓松 华林 +1 位作者 韩星会 黄松 《Journal of Central South University》 SCIE EI CAS 2013年第2期279-292,共14页
The aim of this work is to propose a 3D FE model of a theoretical assembling straight bevel gear pair to analyze the contact fatigue on the tooth surface and the bending fatigue in the tooth root. Based on the cumulat... The aim of this work is to propose a 3D FE model of a theoretical assembling straight bevel gear pair to analyze the contact fatigue on the tooth surface and the bending fatigue in the tooth root. Based on the cumulative fatigue criterion and the stress-life equation, the key meshing states of the gear pair were investigated for the contact fatigue and the bending fatigue. Then, the reliability of the proposed model was proved by comparing the calculation result with the simulation result. Further study was performed to analyze the variation of the contact fatigue stress and the bending fatigue stress under different loads. Furthermore, the roles of the driving pinion and the driven gear pair were evaluated in the fatigue life of the straight bevel gear pair and the main fatigue failure mode was determined for the significant gear. The results show that the fatigue failure of the driving pinion is the main fatigue failure for the straight bevel gear pair and the bending fatigue failure is the main fatigue failure for the driving pinion. 展开更多
关键词 straight bevel gear finite element method contact fatigue bending fatigue
下载PDF
Computation of the Fatigue Life of Road Wheel with Double-Layer Rubber Flange
2
作者 郑慕侨 孙逢春 +1 位作者 蒋轩 张军 《Journal of Beijing Institute of Technology》 EI CAS 2001年第2期169-174,共6页
In order to increase the fatigue life (FL) of road wheels (RW), a kind of double layer rubber flange (DLRF) is put forward. It consists of two layers of rubber, where metal wires are laid in the inner layer and the ou... In order to increase the fatigue life (FL) of road wheels (RW), a kind of double layer rubber flange (DLRF) is put forward. It consists of two layers of rubber, where metal wires are laid in the inner layer and the outer layer has no inlaid metal wires. Stress, strain and temperature field of DLRF were calculated with ANSYS finite element analysis (FEA) software, FL of DLRF RW was also computed with fracture mechanics fatigue theory. The results of computation indicate that the heat generated in RW's rubber flange (RF) can be reduced by the use of DLRF, and the FL of RW can be increased without affecting the mechanical intensity of RW. 展开更多
关键词 double-layer rubber flange road wheel finite element analysis fatigue life
下载PDF
Revised damage evolution equation for high cycle fatigue life prediction of aluminum alloy LC4 under uniaxial loading 被引量:3
3
作者 Zhixin ZHAN Weiping HU +1 位作者 Miao ZHANG Qingchun MENG 《Applied Mathematics and Mechanics(English Edition)》 SCIE EI CSCD 2015年第9期1185-1196,共12页
The fatigue life prediction for components is a difficult task since many factors can affect the final fatigue life. Based on the damage evolution equation of Lemaitre and Desmorat, a revised two-scale damage evolutio... The fatigue life prediction for components is a difficult task since many factors can affect the final fatigue life. Based on the damage evolution equation of Lemaitre and Desmorat, a revised two-scale damage evolution equation for high cycle fatigue is presented according to the experimental data, in which factors such as the stress amplitude and mean stress are taken into account. Then, a method is proposed to obtain the material parameters of the revised equation from the present fatigue experimental data. Finally, with the utilization of the ANSYS parametric design language (APDL) on the ANSYS platform, the coupling effect between the fatigue damage of materials and the stress distribution in structures is taken into account, and the fatigue life of specimens is predicted. The outcome shows that the numerical prediction is in accord with the experimental results, indicating that the revised two-scale damage evolution model can be well applied for the high cycle fatigue life prediction under uniaxial loading. 展开更多
关键词 fatigue damage model continuum damage mechanics fatigue life highcycle fatigue finite element method
下载PDF
New approach based on continuum damage mechanics with simple parameter identification to fretting fatigue life prediction 被引量:3
4
作者 Fei SHEN Weiping HU Qingchun MENG 《Applied Mathematics and Mechanics(English Edition)》 SCIE EI CSCD 2015年第12期1539-1554,共16页
A new continuum damage mechanics model for fretting fatigue life prediction is established. In this model, the damage evolution rate is described by two kinds of quantities. One is associated with the cyclic stress ch... A new continuum damage mechanics model for fretting fatigue life prediction is established. In this model, the damage evolution rate is described by two kinds of quantities. One is associated with the cyclic stress characteristics obtained by the finite element (FE) analysis, and the other is associated with the material fatigue property identified from the fatigue test data of standard specimens. The wear is modeled by the energy wear law to simulate the contact geometry evolution. A two-dimensional (2D) plane strain FE implementation of the damage mechanics model and the energy wear model is presented in the platform of ABAQUS to simulate the evolutions of the fatigue damage and the wear scar. The effect of the specimen thickness is also investigated. The predicted results of the crack initiation site and the fretting fatigue life agree well with available experimental data. Comparisons are made with the critical plane Smith- Watson-Topper (SWT) method. 展开更多
关键词 fretting fatigue continuum damage mechanics WEAR fatigue life finite element (FE) analysis
下载PDF
Fatigue fracture analysis of gear teeth using XFEM 被引量:3
5
作者 Yu WEI Yong JIANG 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2019年第10期2099-2108,共10页
Gear teeth in gear transmission systems suffer seriously from fatigue failure during service. In this work, a 2 D double-tooth model was constructed with periodic boundary conditions. The fatigue fracture behavior of ... Gear teeth in gear transmission systems suffer seriously from fatigue failure during service. In this work, a 2 D double-tooth model was constructed with periodic boundary conditions. The fatigue fracture behavior of gear teeth was analyzed using the extended finite element method(XFEM), with emphases on the impacts of initial crack geometries and cyclic load factors. The results suggested that the shortest fatigue life is expected for 0° orientation cracks initiating at the maximum principal stress. Cracks that initiate closer to the bottom land of gear tooth are relatively safe. Moreover, to evaluate the fatigue load conditions, load ratio, load range, and mean load should be all taken into considerations. Further XFEM simulation for material selection was performed to guide the gear design. Among various material parameters, the material constant C and tensile strength are the most significant ones in determining the fatigue life. 展开更多
关键词 gear fatigue FRACTURE finite element method
下载PDF
Calculation of Thermal Stress and Fatigue Life of 1000 MW Steam Turbine Rotor 被引量:1
6
作者 Shuang Bian Wenyao Li 《Energy and Power Engineering》 2013年第4期1484-1489,共6页
The paper calculated the temperature and stress fields of 1000 MW ultra-supercritical steam turbine rotors which start in cold condition using the finite element calculation program (ANSYS). After getting rotor stress... The paper calculated the temperature and stress fields of 1000 MW ultra-supercritical steam turbine rotors which start in cold condition using the finite element calculation program (ANSYS). After getting rotor stress field, the paper use the general slope method to estimate the low cycle fatigue life loss, the rest of the conditions can be calculated in this method. 展开更多
关键词 Component STEAM TURBINE Thermal Stress finite element Method fatigue life
下载PDF
Stress distribution and fatigue life of built-up sleeved backup roll 被引量:1
7
作者 朱忠英 孙登月 许石民 《Journal of Central South University》 SCIE EI CAS 2012年第8期2173-2178,共6页
The advantage of built-up sleeved backup roll was described. Based on the stress distribution analysis and simulation for the built-up sleeved backup roll by using finite element method, the effects of roll sleeve thi... The advantage of built-up sleeved backup roll was described. Based on the stress distribution analysis and simulation for the built-up sleeved backup roll by using finite element method, the effects of roll sleeve thickness and shrink range on the stress-strain field were studied. Finally, based on the methodology and strategy of the fatigue analysis, fatigue life of backup roll was estimated by using the stress-strain data obtained through finite element simulation. The results show that roll sleeve thickness and shrink range have a great influence on sleeve stress distribution of built-up sleeved roll. Under the circumstance of ensuring transferring enough torque, the shrink range should be kept small. However, thicker roll sleeve has longer roll service life when the shrink range is constant. 展开更多
关键词 built-up sleeved backup roll stress-strain analysis finite element method shrink range fatigue life
下载PDF
Fatigue Life Estimation of an Elastomeric Pad by ε-N Curve and FEA 被引量:1
8
作者 Baban Suryatal Haribhau Phakatkar +1 位作者 Kasilingam Rajkumar Ponniah Thavamani 《Journal of Surface Engineered Materials and Advanced Technology》 2015年第2期85-92,共8页
Failure analysis and fatigue life prediction are very important in the design procedure to assure the safety and reliability of rubber components. The fatigue life of a railway elastomeric pad is predicted by combinin... Failure analysis and fatigue life prediction are very important in the design procedure to assure the safety and reliability of rubber components. The fatigue life of a railway elastomeric pad is predicted by combining the test of material properties and finite element analysis (FEA). The specially developed chloroprene rubber material’s fatigue life equation is acquired based on uniaxial tensile test and fatigue life tests performed on the dumbbell specimens of the chloroprene rubber. The same chloroprene rubber was developed at Indian Rubber Manufacturer’s Research Association, Thane. The strain distribution contours and the maximum total principal strains of the elastomeric pad at different compressive loads are obtained using finite element analysis method. The software used for the FEA was ANSYS. The three parameter nonlinear hyperelastic Mooney-Rivlin Model and plane 182 elements were used for finite element analysis. The critical region cracks prone to arise are obtained and analysed. Then the maximum first principal elastic strain was used as the fatigue damage parameter, which is substituted in the chloroprene rubber’s fatigue life equation, to predict the fatigue life of an elastomeric pad in the number of cycles at different compressive loads. The results were compared with the technical requirements given by Indian Railway’s Research Designs and Standards Organization. These requirements were achieved up to certain extents. The results were also compared with the data available in the literature and a similarity was observed between the results acquired and literature data. In short, the proposed fatigue life prediction method can shorten the product design cycle, decrease the design and product cost remarkably and improve the quality of an elastomeric pad. 展开更多
关键词 ELASTOMERIC PAD fatigue life finite element Analysis (FEA) fatigue life Equation Total Principal Strain CHLOROPRENE RUBBER
下载PDF
FATIGUE DAMAGE AND LIFETIME PREDICTION OF AERONAUTIC WELDED STRUCTURES UNDER HIGH TEMPERATURE
9
作者 Zuo Jianzheng, Lou Zhiwen, Kuang Zhenbang (State Key Laboratory of Mechanical Structural Strength and Vibration, Xi′an Jiaotong University, Xi′an, 710049, China) Yang Shijie (Institute No.606, the Aeroengine General Company of China, Shenyan 《Chinese Journal of Aeronautics》 SCIE EI CAS CSCD 1997年第3期29-34,共6页
The fatigue damage evolution equations and the relation of fatigue damage parameter with maximum cyclic stress of superalloy GH150 and its welded structures are established. The fatigue damage evolution equations in a... The fatigue damage evolution equations and the relation of fatigue damage parameter with maximum cyclic stress of superalloy GH150 and its welded structures are established. The fatigue damage evolution equations in a multiaxial stress state are also given. By use of cyclic thermal elastoplastic damage constitutive relations, the fatigue damage and lifetime predictions are carried out for the welded combustion chamber of aeroengine. 展开更多
关键词 welded structures fatigue life DAMAGE finite element method lifetime prediction
下载PDF
Fatigue Analysis and Life Prediction of Dumpers with Cumulative Fatigue Damage Approach
10
作者 LI Shouju LIU Yingxi SUN Huiling 《上海交通大学学报》 EI CAS CSCD 北大核心 2004年第z2期96-100,共5页
A fatigue damage model is developed for evaluating accumulative fatigue damage of dumpers. The loading spectrums acted on dumpers are created according to measured strain data in field. The finite element analysis is ... A fatigue damage model is developed for evaluating accumulative fatigue damage of dumpers. The loading spectrums acted on dumpers are created according to measured strain data in field. The finite element analysis is carried out for assessing stress distribution and strength characteristics of dumpers. Fatigue damage indexes and service life are calculated by a modified Palmgren-Miner rule. The investigation shows that fatigue notch factor has a significant influence on the calculation of fatigue damage of dumpers. 展开更多
关键词 fatigue life prediction dumper miner's RULE finite element analysis LOADING spectrums
下载PDF
基于MSC.Fatigue的链条疲劳寿命分析与优化 被引量:1
11
作者 付振明 李存志 +1 位作者 谢爱军 王桂斌 《机械工程师》 2023年第2期132-135,共4页
针对链条疲劳寿命可靠性设计求解复杂、试验周期长、试验成本高等问题,在ABAQUS有限元分析的基础上,提出了一种基于MSC.Fatigue的链条疲劳寿命分析方法,能够快速确定链条的最小疲劳寿命及其分布,找出链条设计薄弱环节。同时提出了一种... 针对链条疲劳寿命可靠性设计求解复杂、试验周期长、试验成本高等问题,在ABAQUS有限元分析的基础上,提出了一种基于MSC.Fatigue的链条疲劳寿命分析方法,能够快速确定链条的最小疲劳寿命及其分布,找出链条设计薄弱环节。同时提出了一种优化设计方案,并且对优化方案分别进行了MSC.Fatigue疲劳寿命分析和疲劳试验验证。疲劳寿命结果不仅满足了疲劳设计要求,而且更进一步验证了仿真分析与实际试验验证结果的一致性和有效性,为后续链系统的可靠性设计提供了依据。 展开更多
关键词 链条 有限元 疲劳寿命 MSC.fatigue
下载PDF
Influences of fine pitch solder joint shape parameters on fatigue life under thermal cycle
12
作者 黄春跃 吴兆华 +1 位作者 黄红艳 周德俭 《中国有色金属学会会刊:英文版》 EI CSCD 2005年第4期807-812,共6页
The solder joint reliability of a 0.5mm lead pitch, 240-pin quad flat package(QFP) was studied by nonlinear finite element analysis(FEA). The stress/strain distributions within the solder joints and the maximum plas... The solder joint reliability of a 0.5mm lead pitch, 240-pin quad flat package(QFP) was studied by nonlinear finite element analysis(FEA). The stress/strain distributions within the solder joints and the maximum plastic strain range of the solder joints were determined. Based on the calculated maximum plastic strain range the thermal fatigue life of the solder joints was calculated using Coffin-Manson equation. The influences of shape parameters including volume of solder joint, pad size and stand-off on the thermal fatigue life of the solder joints were also studied. The results show that the stress and strain distribution in the solder joint are not uniform; the interface between the lead and the solder joint is the high stress and strain region; the maximum stress and stain occur at the topmost point where the solder joint intersects with the inner side of the lead. The solder joint cracks should occur firstly at this point and propagate along the interface between the solder and the lead. The solder joint with the pad size of 1.25mm×0.35mm, the stand-off of 0.02mm and the solder volume of 0.026mm^3 has longer fatigue life than that of any others. These optimal parameters have been applied in practice to assemble the 240-pin, 0.5mm pitch QFP. 展开更多
关键词 金属加工 焊接工艺 疲劳强度问题 非线性有限元分析
下载PDF
基础激励下裂纹梁结构疲劳寿命预测模型
13
作者 龙慧 黄长征 +1 位作者 刘义伦 李松柏 《机械设计与制造》 北大核心 2024年第9期77-84,共8页
为了发展基于模型的裂纹梁结构疲劳寿命预测方法,提出了一种新的三维裂纹梁单元刚度矩阵。基于该刚度矩阵,建立基础激励下裂纹梁结构的三维有限元模型。推导三维裂纹梁单元的应力强度因子,建立三维裂纹梁单元的疲劳裂纹扩展模型。采用... 为了发展基于模型的裂纹梁结构疲劳寿命预测方法,提出了一种新的三维裂纹梁单元刚度矩阵。基于该刚度矩阵,建立基础激励下裂纹梁结构的三维有限元模型。推导三维裂纹梁单元的应力强度因子,建立三维裂纹梁单元的疲劳裂纹扩展模型。采用振动响应与裂纹扩展增量交互计算方法,计算循环载荷作用下裂纹梁结构的疲劳寿命。研究结果表明:裂纹梁结构寿命预测模型较好地体现了疲劳裂纹扩展寿命与基础激励参数、结构参数和裂纹参数之间的内在关系,反映了基础激励对裂纹梁结构疲劳寿命的影响。最后通过实验对模型进行了验证。 展开更多
关键词 基础激励 裂纹梁结构 有限单元法 疲劳寿命 动力学模型 裂纹扩展
下载PDF
弹上电子产品加固防护可靠性分析研究
14
作者 李博 郭志伟 +3 位作者 李壮 王冲 侯玥 王怡 《兵器装备工程学报》 CAS CSCD 北大核心 2024年第S01期276-282,共7页
提出一种弹上电子产品球栅阵列封装元器件的新型加固防护工艺方法,对使用不同加固防护方法的电子产品进行了随机振动试验与有限元仿真分析,研究对球栅阵列封装(BGA)元器件焊点可靠性的影响;采用Steinberg疲劳寿命模型分析焊点的疲劳寿... 提出一种弹上电子产品球栅阵列封装元器件的新型加固防护工艺方法,对使用不同加固防护方法的电子产品进行了随机振动试验与有限元仿真分析,研究对球栅阵列封装(BGA)元器件焊点可靠性的影响;采用Steinberg疲劳寿命模型分析焊点的疲劳寿命。研究表明,纳米疏水剂、四角点胶配合3D打印壳体封装的组合新型弹上电子产品加固防护方法能有效提升产品可靠性。 展开更多
关键词 加固 防护 随机振动 球栅阵列封装 有限元仿真分析(FEA) 振动疲劳寿命
下载PDF
波纹管最大压缩位移及疲劳寿命分析
15
作者 王玉 杨知我 《高压电器》 CAS CSCD 北大核心 2024年第11期241-245,共5页
为解决某GIS母线中波纹管的最大压缩位移和疲劳寿命究竟能否同时满足工程指标的难题,应用工程计算和有限元分析分别加以计算,然后通过两种计算结果和实验验证进行比较,以期获得哪种方法更精确可靠。为达此目的,文中给出了工程计算和有... 为解决某GIS母线中波纹管的最大压缩位移和疲劳寿命究竟能否同时满足工程指标的难题,应用工程计算和有限元分析分别加以计算,然后通过两种计算结果和实验验证进行比较,以期获得哪种方法更精确可靠。为达此目的,文中给出了工程计算和有限元建模的详细过程。按工程计算方法得到的最大压缩位移结果无法满足工程指标,而有限元分析计算方法,却可以达到工程指标,且有较大的安全裕度。有限元分析还揭示了满足大压缩位移的机理,计算结果符合某GIS工程同时需要的压缩位移和疲劳寿命。经型式试验也验证了模拟的正确性。充分证明了有限元分析方法是比按工程计算方法更为先进和准确的设计手段。 展开更多
关键词 GIS 波纹管 大压缩位移 疲劳寿命 工程计算 有限元分析
下载PDF
岸桥起重机前大梁疲劳寿命的数值模拟分析
16
作者 陈科 彭语堂 +2 位作者 肖祺滨 宋奎 唐现琼 《湘潭大学学报(自然科学版)》 CAS 2024年第4期51-59,共9页
为了保证岸桥起重机的安全作业,评估岸桥起重机前大梁的疲劳寿命是非常必要的.首先在ANSYS中建立前大梁模型进行静力分析,采用实际工况进行加载,求得起重机主要构件在荷载组合下的应力状态和变形量,与行业规范进行比较,校验在荷载作用... 为了保证岸桥起重机的安全作业,评估岸桥起重机前大梁的疲劳寿命是非常必要的.首先在ANSYS中建立前大梁模型进行静力分析,采用实际工况进行加载,求得起重机主要构件在荷载组合下的应力状态和变形量,与行业规范进行比较,校验在荷载作用下的强度和刚度.针对结构的危险部位,如出现较大应力及变形量的部位,使用ANSYS APDL导出其周边的柔性体,耦合多体动力学软件ADAMS进行动力学仿真.采取不同的连接方式添加运动副及驱动,还原岸桥起重机构件间的连接状态,并导出在给定工况下岸桥起重机前大梁载荷谱.利用Ncode design life的“疲劳五框图”结合线性损伤理论、材料的S-N曲线,对岸桥起重机前大梁进行了疲劳分析.结果表明,前大梁与前拉杆的连接处为寿命最短部位,基于修正模型Godman获得的最小循环次数为7.145E+05次.该文的研究结果可为预测岸桥起重机的疲劳寿命提供重要参考. 展开更多
关键词 岸桥起重机 动力学 疲劳寿命 损伤理论 有限元
下载PDF
倾覆力耦合的大兆瓦风机主轴-齿轮箱法兰结构疲劳寿命研究
17
作者 宁可 王奇 +2 位作者 陈纪光 王建梅 宁文钢 《机械设计》 CSCD 北大核心 2024年第7期121-127,共7页
大兆瓦风机主轴-齿轮箱法兰连接受倾覆力及其他交变载荷的作用,极易产生疲劳破坏。文中建立了考虑倾覆力耦合作用的法兰连接有限元数值模型,分析了特定工况下法兰连接各部件应力场分布规律;通过GH-Bladed获得主轴实际转矩变化数据,根据... 大兆瓦风机主轴-齿轮箱法兰连接受倾覆力及其他交变载荷的作用,极易产生疲劳破坏。文中建立了考虑倾覆力耦合作用的法兰连接有限元数值模型,分析了特定工况下法兰连接各部件应力场分布规律;通过GH-Bladed获得主轴实际转矩变化数据,根据雨流计数法计算得到了主轴和螺栓多种工况下载荷-时间历程曲线,基于Brown-Miller准则并结合材料的S-N曲线,使用FE-SAFE给出了不同预紧力条件下主轴和螺栓的疲劳寿命,疲劳分析结果表明:随着预紧力的减小,主轴的疲劳寿命大于螺栓的,螺栓在风机运行过程中更容易发生疲劳破坏。基于VDI2230规范,结合法兰界面涂层增摩工艺,得到了法兰界面摩擦因数、螺栓预紧力与法兰结构疲劳寿命的理论模型。该研究对于大兆瓦风机主轴-齿轮箱法兰连接结构设计和疲劳寿命提升具有一定的指导意义。 展开更多
关键词 风电法兰 有限元模型 疲劳寿命分析 摩擦因数 高强度螺栓
下载PDF
超临界锅炉再热热段管道裂纹分析及寿命评估
18
作者 夏红伟 任建辉 杨见森 《工业加热》 CAS 2024年第11期81-84,共4页
某型超临界锅炉再热热段管道内壁出现网状裂纹,裂纹分布于该处疏水管沿蒸汽流动方向约200 mm范围内。经宏观检查,无损检测以及扫描电镜形貌检查,判断其为热疲劳裂纹。通过查询该锅炉的运行记录,分析原因为再热蒸汽压力波动,导致疏水管... 某型超临界锅炉再热热段管道内壁出现网状裂纹,裂纹分布于该处疏水管沿蒸汽流动方向约200 mm范围内。经宏观检查,无损检测以及扫描电镜形貌检查,判断其为热疲劳裂纹。通过查询该锅炉的运行记录,分析原因为再热蒸汽压力波动,导致疏水管道产生的冷凝水反复涌入再热热段管道,使其管道内壁产生热疲劳裂纹。运用有限元软件模拟出了疏水管内冷凝水产生的液面位置,即距离再热热段管道外壁超过30 cm的疏水管内再热蒸汽会全部冷凝为液态水。提出了避免产生此种热疲劳裂纹的解决方法,如调整疏水一次阀门的位置以及控制再热蒸汽压力的大幅度波动。最后对该段无裂纹的热段管道进行了寿命评估,得出剩余寿命约为61 722 h。 展开更多
关键词 热疲劳裂纹 有限元模拟 寿命评估
下载PDF
螺栓连接波纹腹板钢梁疲劳性能试验与分析
19
作者 袁焕鑫 李晗 +1 位作者 高立强 王奥迪 《建筑钢结构进展》 CSCD 北大核心 2024年第1期86-93,共8页
对2根螺栓连接波纹腹板钢梁试件进行疲劳试验研究,获得了钢梁试件的疲劳性能指标以及失效破坏形态,分析了钢梁截面的应力分布以及循环荷载作用下的应力和刚度变化。汇总现有的焊接波纹腹板钢梁疲劳试验结果,比较分析了焊接钢梁与螺栓连... 对2根螺栓连接波纹腹板钢梁试件进行疲劳试验研究,获得了钢梁试件的疲劳性能指标以及失效破坏形态,分析了钢梁截面的应力分布以及循环荷载作用下的应力和刚度变化。汇总现有的焊接波纹腹板钢梁疲劳试验结果,比较分析了焊接钢梁与螺栓连接钢梁的疲劳寿命差异。采用有限元软件ABAQUS建立了螺栓连接波纹腹板钢梁的精细数值模型,根据疲劳试验结果验证了数值模型的准确性。利用经验证的数值模型,对疲劳破坏位置附近的应力分布进行有限元分析,结果表明螺栓孔边应力集中是疲劳裂纹萌生和引发疲劳破坏的主要原因。基于有限元分析结果,利用FE-Safe软件对螺栓连接波纹腹板钢梁试件的疲劳寿命进行分析,计算得到的疲劳寿命和疲劳破坏位置与试验结果吻合良好。 展开更多
关键词 波纹腹板钢梁 螺栓连接 疲劳试验 疲劳寿命 有限元分析
下载PDF
基于有限元分析的连续油管寿命研究及预测模型
20
作者 黄云 易柳舟 +1 位作者 伍诗豪 刘博涵 《材料导报》 EI CAS CSCD 北大核心 2024年第S01期512-515,共4页
目前针对连续油管的寿命预测研究较少,但在实际的生产中连续油管的突然失效会造成极大安全隐患,急需解决方案。针对此问题,本文使用有限元仿真方法,针对三种规格的CT80连续油管在不同工况下进行有限元分析,得到了连续油管的受力、形变... 目前针对连续油管的寿命预测研究较少,但在实际的生产中连续油管的突然失效会造成极大安全隐患,急需解决方案。针对此问题,本文使用有限元仿真方法,针对三种规格的CT80连续油管在不同工况下进行有限元分析,得到了连续油管的受力、形变和疲劳寿命。用疲劳试验对有限元分析进行验证,证明了有限元分析的疲劳寿命的准确性。将连续油管的直径、壁厚、内压、弯曲半径参数转化为外壁应变和环向应力,通过数据拟合建立了关于外壁应变、环向应力和疲劳寿命之间的全经验公式,得到连续油管疲劳寿命预测模型。并用试验得出的结果与疲劳寿命预测模型进行比较,误差较小,可用于CT80连续油管的疲劳寿命预测,最后通过疲劳试验得到了连续油管在二级加载下的疲劳寿命模型,该模型可预测油管在第二级载荷下的剩余疲劳寿命。 展开更多
关键词 连续油管 有限元分析 疲劳试验 寿命分析 预测模型
下载PDF
上一页 1 2 52 下一页 到第
使用帮助 返回顶部