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Microstructure investigation of dynamic recrystallization in hard machining: From thermodynamic irreversibility

Binxun LI, Xinzhi ZHANG, Song ZHANG

Frontiers of Mechanical Engineering 2021, Volume 16, Issue 2,   Pages 315-330 doi: 10.1007/s11465-020-0612-4

Abstract: The drastically changed thermal, mechanical, and chemical energies within the machined surface layer during hard machining tend to initiate microstructural alteration. In this paper, attention is paid to the introduction of thermodynamic potential to unravel the mechanism of microstructure evolution. First, the thermodynamic potential-based model expressed by the Helmholtz free energy was proposed for predicting the microstructure changes of serrated chip and the machined surface layer. Second, the proposed model was implemented into a validated finite element simulation model for cutting operation as a user-defined subroutine. In addition, the predicted irreversible thermodynamic state change in the deformation zones associated with grain size, which was reduced to less than 1 m from the initial size of 1.5 m on the machined surface, was provided for an in-depth explanation. The good consistency between the simulated results and experimental data validated the efficacy of the developed model. This research helps to provide further insight into the microstructure alteration during metal cutting.

Keywords： thermodynamic irreversibility     Helmholtz free energy     microstructure evolution     dynamic recrystallization    

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Control of aluminum distribution in ZSM-5 zeolite for enhancement of its catalytic performance for propane aromatization

Frontiers of Chemical Science and Engineering doi: 10.1007/s11705-024-2439-8

Abstract: Herein, we found that recrystallization and post-realuminization of ZSM-5 cannot only create hollow structures

Keywords： propane aromatization     zeolite     aluminum distribution     recrystallization and post-realuminization    

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Postsynthesis of hierarchical core/shell ZSM-5 as an efficient catalyst in ketalation and acetalization reactions

Peng Luo, Yejun Guan, Hao Xu, Mingyuan He, Peng Wu

Frontiers of Chemical Science and Engineering 2020, Volume 14, Issue 2,   Pages 258-266 doi: 10.1007/s11705-019-1878-0

Abstract: The micropore volume and the acidity of the resultant hybrid were well-preserved during this recrystallization

Keywords： core/shell ZSM-5     in situ recrystallization     mesopore     ketalation and acetalization reactions    

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Rational Design of and Mechanism Insight into an Efficient Antifreeze Peptide for Cryopreservation Article

Haishan Qi, Yihang Gao, Lin Zhang, Zhongxin Cui, Xiaojie Sui, Jianfan Ma, Jing Yang, Zhiquan Shu, Lei Zhang

Engineering 2024, Volume 34, Issue 3,   Pages 164-173 doi: 10.1016/j.eng.2023.01.015

Abstract: In particular, a designed antifreeze peptide named AVD exhibits ideal ice recrystallization inhibition

Keywords： Antifreeze peptides     Evolution analysis     Ice recrystallization inhibition     Molecular dynamics simulation    

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Numerical analysis of nonlinear dynamic behavior of earth dams

Babak EBRAHIMIAN

Frontiers of Structural and Civil Engineering 2011, Volume 5, Issue 1,   Pages 24-40 doi: 10.1007/s11709-010-0082-6

Abstract: A numerical study is conducted to investigate the dynamic behavior of earth dams.The numerical investigation employs a fully nonlinear dynamic finite difference analysis incorporatingcharacteristics, soil behavior, strength of the shell materials and dam reservoir condition on the dynamic

Keywords： earth dam     numerical     nonlinear response     dynamic analysis     earthquake     dam height    

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Construction of interfacial dynamic bonds for high performance lignin/polymer biocomposites

Frontiers of Chemical Science and Engineering 2023, Volume 17, Issue 10,   Pages 1372-1388 doi: 10.1007/s11705-023-2302-3

Abstract: Recently, we proposed the strategy of in situ construction of interfacial dynamic bonds in ligninBy taking advantage of the abundant oxygen-containing polar groups of lignin, we inserted dynamic bondinggroup toward building high-performance lignin/polymer biocomposites through the design of interfacial dynamicbonds (hydrogen bonds, coordination bonds, and dynamic covalent bonds) between lignin and different

Keywords： lignin     polymer     interfacial dynamic bonds    

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Molecular size characterization of heavy oil fractions in vacuum and solution by molecular dynamic simulation

Wenpo REN, Honggang CHEN, Chaohe YANG, Honghong SHAN,

Frontiers of Chemical Science and Engineering 2010, Volume 4, Issue 3,   Pages 250-256 doi: 10.1007/s11705-009-0281-7

Abstract: conformations of polycyclic aromatic and heavy resin in vacuum and toluene solution were obtained by molecular dynamic

Keywords： dynamic simulation     molecular dynamic     behavior     molecule     Adsorption Chromatography    

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Modelling of dynamic contact length in rail grinding process

Shaodan ZHI,Jianyong LI,A. M. ZAREMBSKI

Frontiers of Mechanical Engineering 2014, Volume 9, Issue 3,   Pages 242-248 doi: 10.1007/s11465-014-0305-y

Abstract:

Rails endure frequent dynamic loads from the passing trains for supporting trains and guiding wheelsAnd the calculating models are improved considering the grinding car’s dynamic behaviors during

Keywords： rail grinding     contact length     dynamic model     Hamiltonian system     grinding stone     rail grinding car    

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Dynamic Setting Automatic Control System for Flatness and Gauge

Zhang Jinzhi,Duan Chunhua

Strategic Study of CAE 2000, Volume 2, Issue 6,   Pages 67-72

Abstract: characteristics is that shape and gauge close-circuit control is achieved by means of static load distribution, dynamicload distribution and dynamic setting Automatic Gauge Control (AGC), and Bellman dynamic programming

Keywords： dynamic load distribution     shape optimal schedule     dynamic programming     dynamic setting    

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A job-insertion heuristic for minimizing the mean flowtime in dynamic flowshops

Guang GUO, Bo WU, Shuzi YANG

Frontiers of Mechanical Engineering 2011, Volume 6, Issue 2,   Pages 197-202 doi: 10.1007/s11465-011-0211-5

Abstract:

A new adaptive job-insertion based heuristic is presented to minimize the mean flowtime in a dynamicdispatching rule, which is currently one of the most effective methods for minimizing the mean flowtime in dynamic

Keywords： scheduling     dynamic flowshops     flowtime     heuristic     mean flowtime    

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Analytical dynamic solution of a flexible cable-suspended manipulator

Mahdi BAMDAD

Frontiers of Mechanical Engineering 2013, Volume 8, Issue 4,   Pages 350-359 doi: 10.1007/s11465-013-0271-9

Abstract: The interactions among the cables, platforms and actuators can fully evaluate the coupled dynamic analysisAlso, a closed form solution can be adopted to improve the dynamic response to flexibility.

Keywords： parallel robot     flexible cable     suspended robot     dynamic    

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A fast and accurate dynamic relaxation scheme

Mohammad REZAIEE-PAJAND, Mohammad MOHAMMADI-KHATAMI

Frontiers of Structural and Civil Engineering 2019, Volume 13, Issue 1,   Pages 176-189 doi: 10.1007/s11709-018-0486-2

Abstract: Dynamic relaxation method (DRM) is one of the suitable numerical procedures for nonlinear structuralAdding the fictitious inertia and damping forces to the static equation, and turning it to the dynamicBased on this formulation, a new time step is found for the viscous dynamic relaxation.

Keywords： viscous dynamic relaxation     time step     displacement error     geometric nonlinear analysis    

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Finding buckling points for nonlinear structures by dynamic relaxation scheme

Mohammad REZAIEE-PAJAND, Hossein ESTIRI

Frontiers of Structural and Civil Engineering 2020, Volume 14, Issue 1,   Pages 23-61 doi: 10.1007/s11709-019-0549-z

Abstract: Dynamic Relaxation Method (DRM) is an explicit approach for solving the simultaneous systems of equationstactic, the fictitious mass and damping are added to the static governing equations, and an artificial dynamicMixing the dynamic relaxation scheme with external work technique has not been formulated so far.In fact, the suggested load factor depends only on the Dynamic Relaxation (DR) fictitious parameters.It is shown that author’s technique is quicker than the other dynamic relaxation strategies.

Keywords： load factor     external work     dynamic relaxation     static equilibrium path     large displacement    

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Nonlinear analysis of cable structures using the dynamic relaxation method

Mohammad REZAIEE-PAJAND, Mohammad MOHAMMADI-KHATAMI

Frontiers of Structural and Civil Engineering 2021, Volume 15, Issue 1,   Pages 253-274 doi: 10.1007/s11709-020-0639-y

Abstract: The dynamic relaxation method (DRM) is an explicit procedure for analyzing these types of structures.

Keywords： nonlinear analysis     cable structure     stiffness matrix     dynamic relaxation method    

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Title Author Date Type Operation

Microstructure investigation of dynamic recrystallization in hard machining: From thermodynamic irreversibility

Binxun LI, Xinzhi ZHANG, Song ZHANG

Journal Article

Control of aluminum distribution in ZSM-5 zeolite for enhancement of its catalytic performance for propane aromatization

Journal Article

Postsynthesis of hierarchical core/shell ZSM-5 as an efficient catalyst in ketalation and acetalization reactions

Peng Luo, Yejun Guan, Hao Xu, Mingyuan He, Peng Wu

Journal Article

Rational Design of and Mechanism Insight into an Efficient Antifreeze Peptide for Cryopreservation

Haishan Qi, Yihang Gao, Lin Zhang, Zhongxin Cui, Xiaojie Sui, Jianfan Ma, Jing Yang, Zhiquan Shu, Lei Zhang

Journal Article

黄幼麟: Dynamic Consumer Preferences for Electric Vehicles — A Longitudinal Analysis (2020-7-12)

10 Jun 2022

Conference Videos

Numerical analysis of nonlinear dynamic behavior of earth dams

Babak EBRAHIMIAN

Journal Article

Construction of interfacial dynamic bonds for high performance lignin/polymer biocomposites

Journal Article

Molecular size characterization of heavy oil fractions in vacuum and solution by molecular dynamic simulation

Wenpo REN, Honggang CHEN, Chaohe YANG, Honghong SHAN,

Journal Article

Modelling of dynamic contact length in rail grinding process

Shaodan ZHI,Jianyong LI,A. M. ZAREMBSKI

Journal Article

Dynamic Setting Automatic Control System for Flatness and Gauge

Zhang Jinzhi,Duan Chunhua

Journal Article

A job-insertion heuristic for minimizing the mean flowtime in dynamic flowshops

Guang GUO, Bo WU, Shuzi YANG

Journal Article

Analytical dynamic solution of a flexible cable-suspended manipulator

Mahdi BAMDAD

Journal Article

A fast and accurate dynamic relaxation scheme

Mohammad REZAIEE-PAJAND, Mohammad MOHAMMADI-KHATAMI

Journal Article

Finding buckling points for nonlinear structures by dynamic relaxation scheme

Mohammad REZAIEE-PAJAND, Hossein ESTIRI

Journal Article

Nonlinear analysis of cable structures using the dynamic relaxation method

Mohammad REZAIEE-PAJAND, Mohammad MOHAMMADI-KHATAMI

Journal Article