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The formation mechanism and the influence factor of residual stress in machining
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《机械工程前沿(英文)》 2014年 第9卷 第3期 页码 265-269 doi: 10.1007/s11465-014-0311-0
Residual stresses generated in cutting process have important influences on workpiece performance. The paper presents a method of theoretical analysis in order to explicate the formation mechanism of residual stresses in cutting. An important conclusion is drawn that the accumulated plastic strain is the main factor which determines the nature and the magnitude of surface residual stresses in the workpiece. On the basis of the analytical model for residual stress, a series of simulations for residual stress prediction during cutting AISI 1045 steel are implemented in order to obtain the influences of cutting speed, depth of cut and tool edge radius on surface residual stress in the workpiece. And these influences are explained from the perspective of formation mechanism of residual stress in cutting. The conclusions have good applicability and can be used to guide the parameters selection in actual production.
关键词: residual stress analytical model strain plastic cutting parameter
Improved analytical model for residual stress prediction in orthogonal cutting
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《机械工程前沿(英文)》 2014年 第9卷 第3期 页码 249-256 doi: 10.1007/s11465-014-0310-1
The analytical model of residual stress in orthogonal cutting proposed by Jiann is an important tool for residual stress prediction in orthogonal cutting. In application of the model, a problem of low precision of the surface residual stress prediction is found. By theoretical analysis, several shortages of Jiann’s model are picked out, including: inappropriate boundary conditions, unreasonable calculation method of thermal stress, ignorance of stress constraint and cyclic loading algorithm. These shortages may directly lead to the low precision of the surface residual stress prediction. To eliminate these shortages and make the prediction more accurate, an improved model is proposed. In this model, a new contact boundary condition between tool and workpiece is used to make it in accord with the real cutting process; an improved calculation method of thermal stress is adopted; a stress constraint is added according to the volume-constancy of plastic deformation; and the accumulative effect of the stresses during cyclic loading is considered. At last, an experiment for measuring residual stress in cutting AISI 1045 steel is conducted. Also, Jiann’s model and the improved model are simulated under the same conditions with cutting experiment. The comparisons show that the surface residual stresses predicted by the improved model is closer to the experimental results than the results predicted by Jiann’s model.
关键词: residual stress analytical model orthogonal cutting cutting force cutting temperature
Xinyu HUI, Yingjie XU, Weihong ZHANG
《机械工程前沿(英文)》 2020年 第15卷 第3期 页码 475-483 doi: 10.1007/s11465-020-0590-6
关键词: CFRP curing residual stress multiscale modeling finite element method
Subhash ANURAG, Yuebin GUO,
《机械工程前沿(英文)》 2010年 第5卷 第3期 页码 247-255 doi: 10.1007/s11465-010-0097-7
关键词: surface temperature friction residual stress finite element analysis (FEA) dry cutting tool property
《机械工程前沿(英文)》 2022年 第17卷 第3期 doi: 10.1007/s11465-022-0701-7
关键词: magnesium/aluminum assembled wheel riveting residual stress fatigue analysis impact analysis multi-objective optimization
张亦良,徐金泉,王羽辞
《中国工程科学》 2009年 第11卷 第8期 页码 38-43
针对石化特种设备中硫化氢(H2S)应力腐蚀问题现状,综合比较了国际权威机构NACE,EFC以及ISO发布的最新标准、规范,对H2S应力腐蚀的环境界定、试验方法、影响因素、应力腐蚀评价准则及对材料的要求等做了扼要的综述。同时对焊接残余应力的产生、测定方法、消除措施等进行了论述,列举了实际参与研究的发生应力腐蚀容器的实例及残余应力的影响。
An improved algorithm for McDowell’s analytical model of residual stress
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《机械工程前沿(英文)》 2014年 第9卷 第2期 页码 150-155 doi: 10.1007/s11465-014-0295-9
The analytical model for two-dimensional elastoplastic rolling/sliding contact proposed by McDowell is an important tool for predicting residual stress in rolling/sliding processes. In application of the model, a problem of low predicting precision near the surface layer of the component is found. According to the volume-constancy of plastic deformation, an improved algorithm for McDowell’s model is proposed in order to improve its predicting accuracy of the surface residual stress. In the algorithm, a relationship between three normal stresses perpendicular to each other at any point within the component is derived, and the relationship is applied to McDowell’s model. Meanwhile, an unnecessary hypothesis proposed by McDowell can be eliminated to make the model more reasonable. The simulation results show that the surface residual stress predicted by modified method is much closer to the FEM results than the results predicted by McDowell’s model under the same simulation conditions.
关键词: residual stress McDowell’s model volume-constancy of plastic deformation FEM elastoplastic rolling/sliding contact
Xiaobo REN, Odd M. AKSELSEN, B?rd NYHUS, Zhiliang ZHANG
《结构与土木工程前沿(英文)》 2012年 第6卷 第3期 页码 217-223 doi: 10.1007/s11709-012-0169-3
关键词: residual stress ductile crack growth resistance complete Gurson model eigenstrain method
赵智伟, 刘长青, 李迎光, James Gao
《工程(英文)》 2023年 第22卷 第3期 页码 49-59 doi: 10.1016/j.eng.2022.07.018
残余应力是材料的基本属性之一,与零件的几何/尺寸稳定性和疲劳寿命直接相关。针对具有高精度要求的大型零件,其残余应力场的准确测量和预测一直是一个挑战。目前的残余应力场测量技术分为基于应变的有损法以及效率和精度较低的无损法。本文提出了一种基于变形力推断残余应力场的无损法。本方法通过能够反映去除材料后不平衡残余应力场整体效应的变形力来推断零件的残余应力场。利用虚功原理建立了变形力与残余应力场之间的力学关系,并引入正则化方法求解残余应力场。为验证方法的有效性,本文进行了理论验证和实际实验验证。实验结果表明,该方法对于大型结构件的残余应力场测量具有可靠的精度和灵活性。在数字化和智能制造的趋势下,该方法的基本原理为利用加工监测数据预测和补偿由残余应力引起的零件加工变形提供了重要参考。
鲁金忠,张永康,孔德军,任旭东,邹世坤,王西昌
《中国工程科学》 2007年 第9卷 第5期 页码 72-76
利用CO2激光相变热处理技术对TC4钛合金电子束焊缝进行了处理,研究了激光功率、光斑直径、辅助气体等激光工艺参数对电子束焊缝残余应力分布的影响。实验结果表明,激光相变热处理改善了焊缝残余应力的分布,使焊缝表面残余应力由拉应力转变为压应力,其压应力值随着激光功率的增加而增大,随着激光光斑直径的减小而增加;辅助气体为O2时残余压应力值比辅助气体为N2大30~40MPa,激光相变热处理显著提高了TC4钛合金电子束焊缝的残余压应力及其使用寿命。
周益军,张永康,游文明
《中国工程科学》 2007年 第9卷 第10期 页码 40-44
用HVS-1000显微硬度测试仪、X-350A型X射线应力测定仪,以2.5 kW SM2000SM快轴流CO2激光器对0.6 mm厚的TA2板料进行扫描,按照正交试验理论安排成形工艺参数,研究了TA2板料弯曲成形时主要工艺参数对弯曲角度的影响,以及试样表面残余应力的分布和试样断面上的显微硬度变化。结果表明:正交试验中的4个工艺参数的作用是不同的,按其变化对弯曲变形量影响的大小排序,依次是扫描次数、光斑直径、激光束功率、扫描速度;成形参数对试样表面的残余应力分布也存在一定的影响;试样变形区断面上的显微硬度变化呈现出一定的规律。
Application of metal magnetic memory test in failure analysis and safety evaluation of vessels
Yiliang ZHANG, Song YANG, Xuedong XU
《机械工程前沿(英文)》 2009年 第4卷 第1期 页码 40-48 doi: 10.1007/s11465-009-0003-3
关键词: Metal magnetic memory test (MMMT) nondestructive testing (NDT) residual stress propylene purifier ammonia vessel
周建忠,张兴权,王广龙,杨超君,张永康
《中国工程科学》 2005年 第7卷 第11期 页码 94-97
激光喷丸塑性成形金属板料是从激光强化发展起来的新技术。当激光诱导冲击波的峰值超过材料的 动态屈服极限时,板料冲击区的表层发生微观塑性变形,导致了板料厚度方向上不均勻应力分布,使板料发生 宏观变形。不同的激光脉冲参数在板料内部产生不同的残余应力,不同的残余应力使板料发生不同的变形,通 过控制喷丸的工艺参数来控制板料内部应力场的精确分布,就可实现板料的精确变形。其显著特点是成形精确, 且表层留有有益的残余压应力。
Lizhao DAI; Wengang XU; Lei WANG; Shanchang YI; Wen CHEN
《结构与土木工程前沿(英文)》 2022年 第16卷 第3期 页码 388-400 doi: 10.1007/s11709-022-0809-1
关键词: post-tensioned concrete beams strand fracture secondary transfer length residual prestress
Hot-dip galvanizing of cold-formed steel hollow sections: a state-of-the-art review
Min SUN, Jeffrey A. PACKER
《结构与土木工程前沿(英文)》 2019年 第13卷 第1期 页码 49-65 doi: 10.1007/s11709-017-0448-0
关键词: cold-formed steel hollow structural sections hot-dip galvanizing embrittlement heat-treatment residual stress cracking
标题 作者 时间 类型 操作
Multiscale model of micro curing residual stress evolution in carbon fiber-reinforced thermoset polymer
Xinyu HUI, Yingjie XU, Weihong ZHANG
期刊论文
decouple the contributions of friction and plastic deformation to machined surface temperatures and residualstress patterns in finish dry cutting
Subhash ANURAG, Yuebin GUO,
期刊论文
impact analysis and multi-objective optimization design of Mg/Al assembled wheel considering riveting residualstress
期刊论文
Influence of welding residual stresses on the ductile crack growth resistance of circumferentially cracked
Xiaobo REN, Odd M. AKSELSEN, B?rd NYHUS, Zhiliang ZHANG
期刊论文
Application of metal magnetic memory test in failure analysis and safety evaluation of vessels
Yiliang ZHANG, Song YANG, Xuedong XU
期刊论文
Secondary transfer length and residual prestress of fractured strand in post-tensioned concrete beams
Lizhao DAI; Wengang XU; Lei WANG; Shanchang YI; Wen CHEN
期刊论文