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Advances in molecular dynamics simulation of ultra-precision machining of hard and brittle materials

Xiaoguang GUO,Qiang LI,Tao LIU,Renke KANG,Zhuji JIN,Dongming GUO

Frontiers of Mechanical Engineering 2017, Volume 12, Issue 1,   Pages 89-98 doi: 10.1007/s11465-017-0412-7

Abstract:

Hard and brittle materials, such as silicon, SiC, and optical glasses, are widely used in aerospaceHowever, these materials display poor machinability because of their hard and brittle properties.Damages such as surface micro-crack and subsurface damage often occur during machining of hard and brittleUltra-precision machining is widely used in processing hard and brittle materials to obtain nanoscaleand brittle materials.

Keywords： MD simulation     ultra-precision machining     hard and brittle materials     machining mechanism     review    

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A review on ductile mode cutting of brittle materials

Elijah Kwabena ANTWI, Kui LIU, Hao WANG

Frontiers of Mechanical Engineering 2018, Volume 13, Issue 2,   Pages 251-263 doi: 10.1007/s11465-018-0504-z

Abstract:

Brittle materials have been widely employed for industrial applications due to their excellent mecha-nicalBut obtaining smooth and damage-free surface on brittle materials by traditional machining methods likeThus the study of ductile mode cutting of brittle materials has been attracting more and more effortsThis paper provides an overview of ductile mode cutting of brittle materials including ductile natureIt is believed that ductile mode cutting of brittle materials could be achieved when both crack-free

Keywords： ductile mode cutting     brittle materials     critical undeformed chip thickness     brittle-ductile transition    

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Crystalline mesoporous transition metal oxides: hard-templating synthesis and application in environmental

Zhen MA, Bei ZHOU, Yu REN

Frontiers of Environmental Science & Engineering 2013, Volume 7, Issue 3,   Pages 341-355 doi: 10.1007/s11783-012-0472-1

Abstract: Mesoporous metal oxides can be synthesized via a soft-templating or hard-templating approach, and thesematerials have recently found some applications in environmental catalysis, such as CO oxidation, Nreview, we summarize the synthesis of mesoporous transition metal oxides using mesoporous silicas as hardtemplates, highlight the application of these materials in environmental catalysis, and furnish some

Keywords： mesoporous materials     silica     metal oxide     hard-templating     environmental catalysis    

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A concise review about fracture assessments of brittle solids with V-notches

Hsien-Yang YEH, Bin YANG

Frontiers of Structural and Civil Engineering 2019, Volume 13, Issue 2,   Pages 478-485 doi: 10.1007/s11709-019-0520-z

Abstract:

A concise review of recent studies about the fracture assessments of elastic brittle solid materials

Keywords： fracture     assessment     brittle solids     V-notches     review    

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A FEniCS implementation of the phase field method for quasi-static brittle fracture

HIRSHIKESH, Sundararajan NATARAJAN, Ratna Kumar ANNABATTULA

Frontiers of Structural and Civil Engineering 2019, Volume 13, Issue 2,   Pages 380-396 doi: 10.1007/s11709-018-0471-9

Abstract: The present work discusses the implementation of the phase field method for brittle fracture within the

Keywords： phase field method     FEniCS     brittle fracture     crack propagation     variational theory of fracture    

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Research progress on ultra-precision machining technologies for soft-brittle crystal materials

Hang GAO,Xu WANG,Dongming GUO,Yuchuan CHEN

Frontiers of Mechanical Engineering 2017, Volume 12, Issue 1,   Pages 77-88 doi: 10.1007/s11465-017-0411-8

Abstract:

Soft-brittle crystal materials are widely used in many fields, especially optics and microelectronicsHowever, these materials are difficult to machine through traditional machining methods because of theirbrittle, soft, and anisotropic nature.crystals are introduced by using some representative materials (e.g., potassium dihydrogen phosphateThis article reviews the research progress of soft-brittle crystals processing.

Keywords： brittle     soft     functional crystal     ultra-precision machining    

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Analysis of load and adaptability of disc cutters during shield tunneling in soft–hard varied strata

Frontiers of Structural and Civil Engineering 2023, Volume 17, Issue 4,   Pages 533-545 doi: 10.1007/s11709-023-0946-1

Abstract: disc cutters of shield machines exhibit unsatisfactory adaptability and performance during the soft–hardrotation state, cutting performance, and adaptability of disc cutters during shield tunneling in soft–hardHighway Administration constitutive models are introduced to numerically simulate the failure process of materials

Keywords： shield tunneling     disc cutter load     laboratory excavation test     numerical calculation     soft–hard varied    

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Full-mechanized caving mining technology of extremely thick and hard coal-seam with hard roof in shallow

Zhang Zhongwen,Wu Jinan

Strategic Study of CAE 2011, Volume 13, Issue 11,   Pages 107-112

Abstract: recovery ratio would be realized by lengthening mining face and adding mining height in shallow buried hardcoal-seam with hard roof.

Keywords： shallow buried depth     hard coal-seam with hard roof     top-coal caving difficulty degree     full-mechanized    

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Primary cilia in hard tissue development and diseases

Frontiers of Medicine 2021, Volume 15, Issue 5,   Pages 657-678 doi: 10.1007/s11684-021-0829-6

Abstract: Bone and teeth are hard tissues.Hard tissue diseases have a serious effect on human survival and quality of life.mutations present overt changes in the skeletal system, suggesting that primary cilia are involved in hardIn addition, the cilium-related diseases of hard tissue and the manifestations of mutant cilia in theWe believe that all the findings will help with the intervention and treatment of related hard tissue

Keywords： primary cilia     bone     mechanical sensing     hard tissue     cilium-related bone disease     tooth    

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Field and laboratory experimental studies on hard-rock tunnel excavation based on disc cutter coupled

Frontiers of Structural and Civil Engineering   Pages 1370-1386 doi: 10.1007/s11709-023-0947-0

Abstract: The tunnel boring machine (TBM) is typically used in hard-rock tunnel excavation.nozzle diameter, and nozzle speed on cutting are investigated via laboratory experiments of cutting hard

Keywords： tunnel boring machine     hard-rock cutting     free face     disc cutter     rock-cutting efficiency    

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Improved CO

Mahboube Ghahramaninezhad, Fatemeh Mohajer, Mahdi Niknam Shahrak

Frontiers of Chemical Science and Engineering 2020, Volume 14, Issue 3,   Pages 425-435 doi: 10.1007/s11705-019-1873-5

Abstract: capturing was developed via functionalization of zeolitic imidazolate framework-91 (ZIF-91) to generate a hard/hard (metal-oxygen) structure named as lithium-modified ZIF-91 (ZIF-91-OLi compound).

Keywords： hard/hard structure     acidic hydrogen     ZIF-91     carbon capture     ZIF-91-OLi    

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Implementation aspects of a phase-field approach for brittle fracture

G. D. HUYNH, X. ZHUANG, H. NGUYEN-XUAN

Frontiers of Structural and Civil Engineering 2019, Volume 13, Issue 2,   Pages 417-428 doi: 10.1007/s11709-018-0477-3

Abstract: This paper provides a comprehensive overview of a phase-field model of fracture in solid mechanics setting. We start reviewing the potential energy governing the whole process of fracture including crack initiation, branching or merging. Then, a discretization of system of equation is derived, in which the key aspect is that for the correctness of fracture phenomena, a split into tensile and compressive terms of the strain energy is performed, which allows crack to occur in tension, not in compression. For numerical analysis, standard finite element shape functions are used for both primary fields including displacements and phase field. A staggered scheme which solves the two fields of the problem separately is utilized for solution step and illustrated with a segment of Python code.

Keywords： phase-field modeling     FEM     staggered scheme     fracture    

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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: drastically changed thermal, mechanical, and chemical energies within the machined surface layer during hard

Keywords： thermodynamic irreversibility     Helmholtz free energy     microstructure evolution     dynamic recrystallization     hard    

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Effect of magneto rheological damper on tool vibration during hard turning

P. Sam PAUL, A. S. VARADARAJAN

Frontiers of Mechanical Engineering 2012, Volume 7, Issue 4,   Pages 410-416 doi: 10.1007/s11465-012-0341-4

Abstract:

Recently, the concept of hard turning has gained considerable attention in metal cutting as it canreplace the traditional process cycle of turning, heat treating, and finish grinding for assembly of hardrheological (MR) fluid damper for suppressing tool vibration and promoting better cutting performance during hardcutting performance during turning of AISI 4340 steel of 46 HRC with minimal fluid application using hard

Keywords： tool vibration     magneto rheological damper     hard turning     surface finish     tool wear    

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Crack evolution of soft–hard composite layered rock-like specimens with two fissures under uniaxial compression

Frontiers of Structural and Civil Engineering 2021, Volume 15, Issue 6,   Pages 1372-1389 doi: 10.1007/s11709-021-0772-2

Abstract: correlation were used to study the spatiotemporal evolution characteristics of crack extension of soft and hardHard layers predominantly produce tensile cracks; soft layers produce shear cracks.The first crack always sprouts at the tip or middle of prefabricated fractures in hard layers.

Keywords： soft−hard composite layered rock mass     double cracks     crack evolution     acoustic emission     digital image    

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Title Author Date Type Operation

Advances in molecular dynamics simulation of ultra-precision machining of hard and brittle materials

Xiaoguang GUO,Qiang LI,Tao LIU,Renke KANG,Zhuji JIN,Dongming GUO

Journal Article

A review on ductile mode cutting of brittle materials

Elijah Kwabena ANTWI, Kui LIU, Hao WANG

Journal Article

Crystalline mesoporous transition metal oxides: hard-templating synthesis and application in environmental

Zhen MA, Bei ZHOU, Yu REN

Journal Article

A concise review about fracture assessments of brittle solids with V-notches

Hsien-Yang YEH, Bin YANG

Journal Article

A FEniCS implementation of the phase field method for quasi-static brittle fracture

HIRSHIKESH, Sundararajan NATARAJAN, Ratna Kumar ANNABATTULA

Journal Article

Research progress on ultra-precision machining technologies for soft-brittle crystal materials

Hang GAO,Xu WANG,Dongming GUO,Yuchuan CHEN

Journal Article

Analysis of load and adaptability of disc cutters during shield tunneling in soft–hard varied strata

Journal Article

Full-mechanized caving mining technology of extremely thick and hard coal-seam with hard roof in shallow

Zhang Zhongwen,Wu Jinan

Journal Article

Primary cilia in hard tissue development and diseases

Journal Article

Field and laboratory experimental studies on hard-rock tunnel excavation based on disc cutter coupled

Journal Article

Improved CO

Mahboube Ghahramaninezhad, Fatemeh Mohajer, Mahdi Niknam Shahrak

Journal Article

Implementation aspects of a phase-field approach for brittle fracture

G. D. HUYNH, X. ZHUANG, H. NGUYEN-XUAN

Journal Article

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

Binxun LI, Xinzhi ZHANG, Song ZHANG

Journal Article

Effect of magneto rheological damper on tool vibration during hard turning

P. Sam PAUL, A. S. VARADARAJAN

Journal Article

Crack evolution of soft–hard composite layered rock-like specimens with two fissures under uniaxial compression

Journal Article