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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
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
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。
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
Minimal residual disease in solid tumors: an overview
《医学前沿(英文)》 2023年 第17卷 第4期 页码 649-674 doi: 10.1007/s11684-023-1018-6
关键词: MRD solid tumor CTC ctDNA
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
Experiment and optimal design of a collection device for a residual plastic film baler
Qi NIU,Xuegeng CHEN,Chao JI,Jie WU
《农业科学与工程前沿(英文)》 2015年 第2卷 第4期 页码 347-354 doi: 10.15302/J-FASE-2015077
关键词: residual film collection device collection rate of residual film impurity of film package optimization baler
Improved analytical model for residual stress prediction in orthogonal cutting
null
《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
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
Resistance of large deformation of the Wushaoling Tunnel F7 soft fault
ZHAO Xufeng, CHEN Haiming, WANG Chunmiao
《结构与土木工程前沿(英文)》 2007年 第1卷 第1期 页码 123-127 doi: 10.1007/s11709-007-0013-3
Numerical modeling of nonlinear deformation of polymer composites based on hyperelastic constitutive
Qingsheng YANG, Fang XU
《机械工程前沿(英文)》 2009年 第4卷 第3期 页码 284-288 doi: 10.1007/s11465-009-0067-0
关键词: composites hyperelastic finite deformation homogenization micromechanics
Chung-Che CHOU,Ping-Ting CHUNG,Tsung-Han WU,Alexis Rafael Ovalle BEATO
《结构与土木工程前沿(英文)》 2016年 第10卷 第3期 页码 303-311 doi: 10.1007/s11709-016-0347-9
关键词: dual-core self-centering brace (DC-SCB) braced frame tests residual deformation
Bayes estimation of residual life by fusing multisource information
Qian ZHAO, Xiang JIA, Zhi-jun CHENG, Bo GUO
《工程管理前沿(英文)》 2018年 第5卷 第4期 页码 524-532 doi: 10.15302/J-FEM-2018034
Residual life estimation is essential for reliability engineering. Traditional methods may experience difficulties in estimating the residual life of products with high reliability, long life, and small sample. The Bayes model provides a feasible solution and can be a useful tool for fusing multisource information. In this study, a Bayes model is proposed to estimate the residual life of products by fusing expert knowledge, degradation data, and lifetime data. The linear Wiener process is used to model degradation data, whereas lifetime data are described via the inverse Gaussian distribution. Therefore, the joint maximum likelihood (ML) function can be obtained by combining lifetime and degradation data. Expert knowledge is used according to the maximum entropy method to determine the prior distributions of parameters, thereby making this work different from existing studies that use non-informative prior. The discussion and analysis of different types of expert knowledge also distinguish our research from others. Expert knowledge can be classified into three categories according to practical engineering. Methods for determining prior distribution by using the aforementioned three types of data are presented. The Markov chain Monte Carlo is applied to obtain samples of the parameters and to estimate the residual life of products due to the complexity of the joint ML function and the posterior distribution of parameters. Finally, a numerical example is presented. The effectiveness and practicability of the proposed method are validated by comparing it with residual life estimation that uses non-informative prior. Then, its accuracy and correctness are proven via simulation experiments.
关键词: residual life estimation Bayes model linear Wiener process
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
Wendong WANG, Hua LI, Zhenzhen DING, Xiaochang WANG, Rui LIU
《环境科学与工程前沿(英文)》 2012年 第6卷 第4期 页码 470-476 doi: 10.1007/s11783-012-0422-y
关键词: coagulation drinking water humic acid orthophosphate residual Al
标题 作者 时间 类型 操作
Predictive model to decouple the contributions of friction and plastic deformation to machined surfacetemperatures and residual stress patterns in finish dry cutting
Subhash ANURAG, Yuebin GUO,
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
Experiment and optimal design of a collection device for a residual plastic film baler
Qi NIU,Xuegeng CHEN,Chao JI,Jie WU
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
Resistance of large deformation of the Wushaoling Tunnel F7 soft fault
ZHAO Xufeng, CHEN Haiming, WANG Chunmiao
期刊论文
Numerical modeling of nonlinear deformation of polymer composites based on hyperelastic constitutive
Qingsheng YANG, Fang XU
期刊论文
Validation of a steel dual-core self-centering brace (DC-SCB) for seismic resistance: from brace member to one-story one-bay braced frame tests
Chung-Che CHOU,Ping-Ting CHUNG,Tsung-Han WU,Alexis Rafael Ovalle BEATO
期刊论文
Bayes estimation of residual life by fusing multisource information
Qian ZHAO, Xiang JIA, Zhi-jun CHENG, Bo GUO
期刊论文
Multiscale model of micro curing residual stress evolution in carbon fiber-reinforced thermoset polymer
Xinyu HUI, Yingjie XU, Weihong ZHANG
期刊论文