1-20 of 446 Search Results for

material flow models

Follow your search
Access your saved searches in your account

Would you like to receive an alert when new items match your search?
Close Modal
Sort by
Series: ASM Technical Books
Publisher: ASM International
Published: 01 February 2005
DOI: 10.31399/asm.tb.chffa.t51040237
EISBN: 978-1-62708-300-3
... Abstract This chapter discusses the use of finite-element methods for modeling cold forging processes. The discussion covers process modeling inputs, such as geometric parameters, material properties, and interface conditions, and includes several application examples. cold forging...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 February 2005
DOI: 10.31399/asm.tb.chffa.t51040185
EISBN: 978-1-62708-300-3
... Abstract This chapter presents a relatively simple method for estimating forging loads and flow stresses. The method uses the slab analysis technique and accounts for material properties, friction and heat transfer, press ram speed, forging geometry, and billet and die temperatures. The chapter...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 February 2005
DOI: 10.31399/asm.tb.chffa.t51040193
EISBN: 978-1-62708-300-3
...., 2001 ]. The input of the geometric parameters, process parameters, and material parameters sets up a unique case of a closed-die forging. The modeling is then performed to provide information on the metal flow and thermomechanical history of the forging, the distribution of the state variables at any...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 February 2005
DOI: 10.31399/asm.tb.chffa.t51040083
EISBN: 978-1-62708-300-3
..., strain-rate, and temperature. Examples of flow stress equations and material parameters are summarized in Table 8.1 . Flow stress models and parameters Table 8.1 Flow stress models and parameters Forging type Flow stress equation Parameters Cold σ ¯ = K ε...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 June 2016
DOI: 10.31399/asm.tb.hpcspa.t54460067
EISBN: 978-1-62708-285-3
..., methods, and outcome of modeling and simulation of particle impact and of in-flight history of particles in cold spraying. The concept of integration of particle impact and fluid flow modeling to optimize cold spray deposition for a given material is also explained. high-pressure cold spray process...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 March 2000
DOI: 10.31399/asm.tb.aet.t68260001
EISBN: 978-1-62708-336-2
... Abstract This chapter discusses the basic differences between direct and indirect extrusion, the application of plastic theory, the significance of strain and strain rate, friction, and pressure, and factors such as alloy flow stress and extrusion ratio, which influence the quality of material...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 February 2005
DOI: 10.31399/asm.tb.chffa.t51040091
EISBN: 978-1-62708-300-3
..., every method of analysis requires as input: A description of the material behavior under the process conditions, i.e., the flow stress data A quantitative value to describe the friction, i.e., the friction factor, m, or the friction coefficient, μ. These two quantities themselves (flow...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2012
DOI: 10.31399/asm.tb.smfpa.t53500133
EISBN: 978-1-62708-317-1
... In Table 7.4 , E is the Young’s modulus, ν is Poisson’s ratio, c and p are the Cowper-Symonds coefficients for flow-stress calculation, k is the thermal conductivity for 22MnB5, and C p is the heat capacity of 22MnB5. Material model 244 (MAT-244), which is specific for modeling phase-transformation...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2012
DOI: 10.31399/asm.tb.smff.t53400053
EISBN: 978-1-62708-316-4
... of plastic flow is not trivial and depends on a combination of all the stresses in the stress tensor. The most popular yield criteria for isotropic material and anisotropic material used in numerical modeling of sheet metal forming processes are described in this chapter: Isotropic yield criteria...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2010
DOI: 10.31399/asm.tb.scm.t52870201
EISBN: 978-1-62708-314-0
..., and data plots. composite curing cure monitoring heat transfer mathematical models polymer matrix composites residual stress resin flow resin kinetics resin viscosity void formation PROCESSES FOR NEW COMPOSITE MATERIALS, during the 1960s and 1970s, were based solely on previous...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2012
DOI: 10.31399/asm.tb.smfpa.t53500051
EISBN: 978-1-62708-317-1
... of the workpiece material Production of more complicated parts Know-how accumulation for new materials Press repeatability In sheet metal forming, modeling can be used for many purposes, such as predicting material flow, stress, strain, and temperature distribution; estimating forces; predicting...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 February 2005
DOI: 10.31399/asm.tb.chffa.t51040211
EISBN: 978-1-62708-300-3
... with both punches was used whenever experimental data were available for both cases. 17.10 Prediction of Extrusion Loads from Model Test Except where exaggerated inhomogeneities are present in the deforming material, metal flow in extrusion is influenced mainly by tool geometry and lubrication...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 March 2000
DOI: 10.31399/asm.tb.aet.t68260029
EISBN: 978-1-62708-336-2
... an excellent study using numerical methods to calculate the nonsteady-state temperature distribution in extrusion through conical dies. They included the temperature dependencies of the flow stress and of the thermal constants of the billet and the tool materials into the analysis. The researchers considered...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2012
DOI: 10.31399/asm.tb.smff.t53400105
EISBN: 978-1-62708-316-4
... are available for analyzing the mechanics of sheet forming operations. Most of these programs can consider the effect of strain, strain rate, and temperature upon flow stress. Furthermore, they have a database for considering various material models and yield criteria. The main advantages of the FEM...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 February 2005
DOI: 10.31399/asm.tb.chffa.9781627083003
EISBN: 978-1-62708-300-3
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2004
DOI: 10.31399/asm.tb.tt2.t51060209
EISBN: 978-1-62708-355-3
... are inserted into the relations. After having specified the specimen geometry and the material-flow relation, the equations for model formulation can be inserted into an algorithm to simulate the tensile test. At any instant of deformation, the axial variation in strain rate is calculated based on the load...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 February 2005
DOI: 10.31399/asm.tb.chffa.t51040295
EISBN: 978-1-62708-300-3
...-forged parts are almost exclusively produced in closed dies. Therefore, the dies have to withstand high contact pressures well above the flow stress of the billet material at the forging temperature. Also, the amount of surface generation and the sliding velocities at which the billet material moves...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 February 2005
DOI: 10.31399/asm.tb.chffa.t51040059
EISBN: 978-1-62708-300-3
... in forgings produced in high-speed equipment such as mechanical press, screw press, and hammer. A part of generated heat remains in the deformed material, another part flows into the undeformed/less-deformed portion of the material where temperature is lower, while still an additional part may flow...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 30 September 2023
DOI: 10.31399/asm.tb.stmflw.t59390284
EISBN: 978-1-62708-459-8
..., material flow, friction, die wear, heat generation, and lubrication requirements. The chapter also provides information on hydrostatic, friction-assisted, and severe plastic deformation extrusion processes, discusses the cause of instabilities and defects, and explains how to select and apply lubricants...
Series: ASM Technical Books
Publisher: ASM International
Published: 30 April 2020
DOI: 10.31399/asm.tb.bpapp.t59290085
EISBN: 978-1-62708-319-5
... (at the same temperature). This is applicable to systems where the particles are widely separated and do not interact during flow, probably less than 10 vol% solid. For more concentrated suspension, a model based on the solids loading, ϕ, rationalized to the critical solids loading, ϕ C , and pure binder...