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Online since: April 2014
Authors: Chuan Jun Li, Zhan Fu Zhao
Introduction
In this paper, the influence of machining parameters and the factor analysis, application oriented database model is established, based on the development of cutting database management system, realize information to add, query, and other functions and can provide reasonable and effective according to the actual production condition of cutting data, and to achieve for parts and tooling drawings and models stored in the database and realize the page to browse and download function.In the laboratory, on the basis of previous research, the development of database support for the simulation optimization software, database and simulation software of interaction, and for different data structure, database data migration between research and try.
Based on the dynamics simulation optimization algorithm Cutting force simulation algorithm for data analysis.Directly affect the machining deformation of cutting force and cutting heat, and further affect the service life of the tool wear, cutting tool and machining accuracy and machining surface quality.Cutting force and cutting power calculation, formulate reasonable cutting dosage, important parameters of cutting tools, machine tools, jig design.The Mechanical Model of cutting force (Mechanical Model) is put forward by Sabberwaal first, the Model of cutting force is assumed to be proportional to scraps cross-sectional area, the proportion coefficient depends on the cutting condition and material properties.The mechanical model of cutting force has been successfully applied to the milling process, and continuously improved in the application of.Mechanical modeling methods involved in the concentration of cutting force model, the instantaneous rigid force model can more accurately at
any time in the process of processing the size of the cutting force and direction to forecast, and thus get more extensive application of the model.Using the basic principle of transient rigid force model, establish milling dynamics equation, and to consider renewable chip thickness, can the instantaneous may occur in the process of dynamic cutting force and cutting chatter.The comprehensive factors affecting the cutting force analysis, combining with general spiral milling cutter milling forces simulation algorithm, the simulation of milling force was obtained the conceptual model, as shown in figure3: Fig3.
China Mechanical Engineering(2009),pp.1770-1774
ZHANG,D.X.YANG,H.XU.Tool Radius Compensation Algorithm for three-axis NC Peripheral Milling.Chinese Journal of Mechanical Engineering(2007),pp.138-144
Based on the dynamics simulation optimization algorithm Cutting force simulation algorithm for data analysis.Directly affect the machining deformation of cutting force and cutting heat, and further affect the service life of the tool wear, cutting tool and machining accuracy and machining surface quality.Cutting force and cutting power calculation, formulate reasonable cutting dosage, important parameters of cutting tools, machine tools, jig design.The Mechanical Model of cutting force (Mechanical Model) is put forward by Sabberwaal first, the Model of cutting force is assumed to be proportional to scraps cross-sectional area, the proportion coefficient depends on the cutting condition and material properties.The mechanical model of cutting force has been successfully applied to the milling process, and continuously improved in the application of.Mechanical modeling methods involved in the concentration of cutting force model, the instantaneous rigid force model can more accurately at
any time in the process of processing the size of the cutting force and direction to forecast, and thus get more extensive application of the model.Using the basic principle of transient rigid force model, establish milling dynamics equation, and to consider renewable chip thickness, can the instantaneous may occur in the process of dynamic cutting force and cutting chatter.The comprehensive factors affecting the cutting force analysis, combining with general spiral milling cutter milling forces simulation algorithm, the simulation of milling force was obtained the conceptual model, as shown in figure3: Fig3.
China Mechanical Engineering(2009),pp.1770-1774
ZHANG,D.X.YANG,H.XU.Tool Radius Compensation Algorithm for three-axis NC Peripheral Milling.Chinese Journal of Mechanical Engineering(2007),pp.138-144
Online since: September 2013
Authors: Jian Feng Li, Kai Kai Guan, Gang Li, Peng Liu, Fang Yi Li
Rheological Properties of Slurry of Foam Cushion Packaging based on Fiber and Starch
Guan Kaikai1, a, Li Fangyi1, b, Li Gang2, c, Liu Peng1, d, Li Jianfeng1, e
1School of Mechanical Engineering & Key Laboratory of High Efficiency and Clean Mechanical Manufacture (Ministry of Education), Shandong University, Jinan 250061, China
2Shandong Kerui Holding Group Co,.
Under the action of external factors especially the time and temperature, the rheological properties of slurry are easy to be affected and hence a series of changes will occurred in the industrial process such as the resistance of the feeding machine, liquidity of slurry, pressure in the outlet, viscosity of paste.
They are variations of rheological properties to time, with shearing rate, and with temperature.
Test 1: Variations of rheological properties to time Set the speed as 580 RPM, the temperature as 85℃.
The rheological properties of slurry are relatively sensitive to the temperature.
Under the action of external factors especially the time and temperature, the rheological properties of slurry are easy to be affected and hence a series of changes will occurred in the industrial process such as the resistance of the feeding machine, liquidity of slurry, pressure in the outlet, viscosity of paste.
They are variations of rheological properties to time, with shearing rate, and with temperature.
Test 1: Variations of rheological properties to time Set the speed as 580 RPM, the temperature as 85℃.
The rheological properties of slurry are relatively sensitive to the temperature.
Online since: January 2026
Authors: Matthew J. Peel, Sina Safari, Hugh Dorward, Mahmoud Mosafavi
Introduction
Microstructure strongly affects the macroscopic properties and subsequent deformation of polycrystalline materials [1].
Uniaxial mechanical behaviour predicted by a) the GSH-PCA model, b) the Taylor factor model and c) the rolling texture component volume fraction model.
The predictions of mechanical behaviour from the GSH-PCA and Taylor factor surrogate models give very close agreement to the crystal plasticity simulation with a wider uncertainty interval for the Taylor factor model.
A theoretical derivation of the plastic properties of a polycrystalline face-centred metal, London Edinburgh Dublin Philos.
Mostafavi, Predicting residual stress in a 316L electron beam weld joint incorporating plastic properties derived from a crystal plasticity finite element model, Int.
Uniaxial mechanical behaviour predicted by a) the GSH-PCA model, b) the Taylor factor model and c) the rolling texture component volume fraction model.
The predictions of mechanical behaviour from the GSH-PCA and Taylor factor surrogate models give very close agreement to the crystal plasticity simulation with a wider uncertainty interval for the Taylor factor model.
A theoretical derivation of the plastic properties of a polycrystalline face-centred metal, London Edinburgh Dublin Philos.
Mostafavi, Predicting residual stress in a 316L electron beam weld joint incorporating plastic properties derived from a crystal plasticity finite element model, Int.
Online since: December 2013
Authors: Yong Zhang, Bo Wang, Hong Wei Liu
In view of serious degree of mouth formation rock weathering, poor stability, the construction excavation characteristics such as easy to collapse of underground engineering, incision reinforcement technology is used in underground engineering in the mouth period of construction, which changes the mechanical properties of surrounding rock and improves the penetration resistance of surrounding rock.
Into the length of the layer structure design needs to consider the above factors, also need to satisfy the requirement of the underground structure mouth protection performance.
The projectile impact to target media is a very complex phenomenon of rapid changes in the mechanical.
(2) X ——The projectile penetration depth,ft;S ——Characterization of rock materials can be indicators of penetration sex,S = 12( fc Q )-0.3;fc ——The unconfined compressive strength of the rock,lb/in2;Q ——The rock quality index,affected by factors such as joint, crack,can be calculated according to the specification;N ——Warhead shape factor, the oval warhead,N=0.18 Ln/d+0.56;The cone-shaped warhead,N=0.25 Ln/d+0.56,Ln -Minister of warhead degrees,in; d——The projectile diameter,in;W——The projectile weight,lb;A——The projectile cross sectional area,in2;V——The projectile hit rate,ft/s。
Preliminary support of the tunnel pipe roof mechanical behavior and parameters optimization.
Into the length of the layer structure design needs to consider the above factors, also need to satisfy the requirement of the underground structure mouth protection performance.
The projectile impact to target media is a very complex phenomenon of rapid changes in the mechanical.
(2) X ——The projectile penetration depth,ft;S ——Characterization of rock materials can be indicators of penetration sex,S = 12( fc Q )-0.3;fc ——The unconfined compressive strength of the rock,lb/in2;Q ——The rock quality index,affected by factors such as joint, crack,can be calculated according to the specification;N ——Warhead shape factor, the oval warhead,N=0.18 Ln/d+0.56;The cone-shaped warhead,N=0.25 Ln/d+0.56,Ln -Minister of warhead degrees,in; d——The projectile diameter,in;W——The projectile weight,lb;A——The projectile cross sectional area,in2;V——The projectile hit rate,ft/s。
Preliminary support of the tunnel pipe roof mechanical behavior and parameters optimization.
Online since: June 2017
Authors: Surakit Tuampoemsab, Teeratat Sopakitiboon, Apaipan Rattanapan
In order to verify the possibility to prepare heat insulator from the solid NR, many factors such as effect of blowing agent on curing properties of the compounded rubber, types of vulcanization system, air bubble size would be mentioned in this paper.
Table 1 Formulations and properties of the compounded rubber.
Thus, mechanical properties such as tensile strength, compressive strength and elongation at break of the closed cell NR are necessary to investigate.
All mechanical properties and nature of the air bubble were found to be rather good among all NR formulations.
Zhanga, Study on microstructure and mechanical properties relationship of short fibers/rubber foam composites, Eur.
Table 1 Formulations and properties of the compounded rubber.
Thus, mechanical properties such as tensile strength, compressive strength and elongation at break of the closed cell NR are necessary to investigate.
All mechanical properties and nature of the air bubble were found to be rather good among all NR formulations.
Zhanga, Study on microstructure and mechanical properties relationship of short fibers/rubber foam composites, Eur.
Online since: January 2014
Authors: Cheng Dong, Jing Rong Zou, Zhi Yong Li
As one of main parameters that represent the mechanical properties of subgrade soil on flexible pavement mechanics - experience design method[2], the dynamic resilient modulus can better reflect the performance of subgrade soil.
The domestic and international studies have shown that the main influence factors on the dynamic resilient modulus are soil group type, humidity, degree of compaction and stress conditions[3].
Material and test method Basic physical properties of soil.Based on Test Methods of Soils for Highway Engineering [6], the basic physical properties of high liquid limit soil are listed in Table 1.
Therefore, when the prediction model of the dynamical resilient modulus is established, the relationship between stress and strain should be first established as accurately as possible, and the influence of other factors can be reflected by the model parameters.
The composite model can fully reflect the mechanical traits of material.
The domestic and international studies have shown that the main influence factors on the dynamic resilient modulus are soil group type, humidity, degree of compaction and stress conditions[3].
Material and test method Basic physical properties of soil.Based on Test Methods of Soils for Highway Engineering [6], the basic physical properties of high liquid limit soil are listed in Table 1.
Therefore, when the prediction model of the dynamical resilient modulus is established, the relationship between stress and strain should be first established as accurately as possible, and the influence of other factors can be reflected by the model parameters.
The composite model can fully reflect the mechanical traits of material.
Online since: October 2015
Authors: Guo He Li, Hou Jun Qi, Yu Jun Cai
Laser shock processing is a new kind of technology to improve the physical and mechanical properties of the metal surface.
The influence of laser shock processing on the materials mechanical property and microstructure by the analysis of residual stress, microhardness, XRD and TEM.
There are so many scholar have been done the research on the dynamic mechanical property of TC4 Titanium alloy and the parameters of Johnson-cook model are given by curve fitting.
Therefore, the Johnson-cook model is used to characterize the mechanical property of TC4 titanium alloy in this paper.
The density of mesh is a factor which affecting the simulation result.
The influence of laser shock processing on the materials mechanical property and microstructure by the analysis of residual stress, microhardness, XRD and TEM.
There are so many scholar have been done the research on the dynamic mechanical property of TC4 Titanium alloy and the parameters of Johnson-cook model are given by curve fitting.
Therefore, the Johnson-cook model is used to characterize the mechanical property of TC4 titanium alloy in this paper.
The density of mesh is a factor which affecting the simulation result.
Online since: June 2008
Authors: Francicso Gomez Cuevas, Jesus Cintas Físico, José M. Gallardo, Juan Manuel Montes Martos
Montes d
Metallurgy and Materials Engineering Group, University of Seville,
Camino de los Descubrimientos s/n, 41092 Seville, Spain
a
josemar@us.es, bfgcuevas@us.es, cjcintas@us.es, djmontes@us.es
Keywords: Bronze, Restoration, Casting, Mechanical Properties.
Tensile properties are also discussed as they depend on porosity and lead content, what can be useful in the restoration process.
In addition to microstructure, mechanical properties have been evaluated.
Lead content and distribution are also factors that affect the tensile strength.
Tensile properties are also discussed, as they depend on porosity and lead content, what can be useful in the restoration process.
Tensile properties are also discussed as they depend on porosity and lead content, what can be useful in the restoration process.
In addition to microstructure, mechanical properties have been evaluated.
Lead content and distribution are also factors that affect the tensile strength.
Tensile properties are also discussed, as they depend on porosity and lead content, what can be useful in the restoration process.
Online since: September 2020
Authors: Ivan Petryshynets, Roman Kussa, Ihor Kushchenko, Volodymyr Andilakhai, Vadym Zurnadzhy, Vasily Efremenko
The enrichment of austenite by carbon and other alloying elements leads to increase in its stability to phase transformation [19] hence affecting austenite transformation behavior under the bainitizing holding.
Mechanical properties were measured by tensile tests using the specimens of 5 mm diameter and 30 mm gauge.
The tensile properties values are presented in Fig. 5a.
Wu, Effect of matrix structures on TRIP effect and mechanical properties of low-C low-Si Al-added hot-rolled TRIP steels, Mater.
Misra, Interplay between deformation behavior and mechanical properties of intercritically annealed and tempered medium-manganese transformation-induced plasticity steel, Mater.
Mechanical properties were measured by tensile tests using the specimens of 5 mm diameter and 30 mm gauge.
The tensile properties values are presented in Fig. 5a.
Wu, Effect of matrix structures on TRIP effect and mechanical properties of low-C low-Si Al-added hot-rolled TRIP steels, Mater.
Misra, Interplay between deformation behavior and mechanical properties of intercritically annealed and tempered medium-manganese transformation-induced plasticity steel, Mater.
Online since: August 2011
Authors: R. Ashofteh, A. Rastkerdar, S. Kolahdouz, A. Daneshi
Surface integrity in CFG process is influenced by four main factors including surface roughness, superficial micro-crack, burning and changes in micro-hardness.
These surface characteristics called Surface integrity, concern not only the topological (geometric) aspects of surface but rather the whole assemblage of their physical, mechanical, metallurgical, chemical and biological properties and characteristics [1].
The chemical composition, mechanical and Physical properties of cast nickel- based superalloy Inconel 792-5A are given in Table 1.
Table 1: Nominal Composition (wt.%), Mechanical and Physical properties of Inconel 792-5A Inconel 792 C Mn Si Cr Ni W Ti Fe Nominal Composition (Wt.%) 0.070-0.090 0.10 0.050 12.20-12.80 Balance 3.85-4.25 3.75-4.15 0.50 Hardness 38 [HRC] Density 8250 [Kg/m^3] Tensile Stress rupture properties Temp (ºC) Ultimate tensile strength(N/mm2) Yield strength, 0.2% offset (N/mm2) Elongation (%) Reduction in Area (%) Temp (ºC) Stress (N/mm2) Life (Hours.)
CFG with one pass (CD or NCD) increase the depth of the affected surface layer and have negative effect on the ground superficial properties.
These surface characteristics called Surface integrity, concern not only the topological (geometric) aspects of surface but rather the whole assemblage of their physical, mechanical, metallurgical, chemical and biological properties and characteristics [1].
The chemical composition, mechanical and Physical properties of cast nickel- based superalloy Inconel 792-5A are given in Table 1.
Table 1: Nominal Composition (wt.%), Mechanical and Physical properties of Inconel 792-5A Inconel 792 C Mn Si Cr Ni W Ti Fe Nominal Composition (Wt.%) 0.070-0.090 0.10 0.050 12.20-12.80 Balance 3.85-4.25 3.75-4.15 0.50 Hardness 38 [HRC] Density 8250 [Kg/m^3] Tensile Stress rupture properties Temp (ºC) Ultimate tensile strength(N/mm2) Yield strength, 0.2% offset (N/mm2) Elongation (%) Reduction in Area (%) Temp (ºC) Stress (N/mm2) Life (Hours.)
CFG with one pass (CD or NCD) increase the depth of the affected surface layer and have negative effect on the ground superficial properties.