Intrinsic diagram of sheet metal forming limits for arbitrary strain paths

Fatmaoui, Hassan; Mesrar, R.; Chaoufi, Jamal

doi:10.1243/14644207jmda188

Cited by 5 publications

(3 citation statements)

References 23 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…There are several factors such as sheet thickness (Fatmaoui et al, 2008) [5], strain hardening exponent (Djavanroodi and Derogar [6]), strain rate and grain size (Kröhn et al [7]), and temperature (Palumbo et al [8]) affect the FLD.…”

Section: Review On Flds At Cold Warm and Hot Condition For Magnesiummentioning

confidence: 99%

A Review on Formability Prediction and Conistituve Damage Models of Sheet Forming of Magnesium Alloys

Farouk

Mohamed²

2016

The International Conference on Applied Mechanics and Mechanica

View full text Add to dashboard Cite

In recent years, the demand for using magnesium (Mg) alloys has significantly increased in several industrial fields. Due to their favorable strength/weight ratio thus Mg alloy demonstrating a valid replacement for aluminum alloys and High Strength Steels particularly for the production of lightweight parts in aerospace and automotive industries. However the formability of Mg at cold forming conditions is significantly poor and determination of the material formability need special testing procedures and understanding of material failure mechanism. FLD is commonly used to characterize the formability of materials and the key feature of FLD is the forming limit curve (FLC). This paper provides a review on the determination of strain-based and stress-based forming limit diagrams is introduced in this paper. In addition, the constitutive damage models for predicting and characterizing the forming limits of magnesium alloy sheet metals under a wide range of forming conditions at both industrial and scientific level. KEYWORDSMagnesium (Mg) alloys; Forming limit diagram (FLD); Formability test, Damage Model.

show abstract

Section: Review On Flds At Cold Warm and Hot Condition For Magnesiummentioning

confidence: 99%

A Review on Formability Prediction and Conistituve Damage Models of Sheet Forming of Magnesium Alloys

Farouk

Mohamed²

2016

The International Conference on Applied Mechanics and Mechanica

View full text Add to dashboard Cite

show abstract

“…The relationship is presented as a curve and if the orthogonal principal strain set, at all positions in a deforming sheet, lies below it a sound product will result and if above, failure will occur. Several factors affect the FLC including sheet thickness [5], temperature [6], strain rate and grain size [7] and strain hardening exponent [8].…”

Section: Introductionmentioning

confidence: 99%

Strain-Based Continuum Damage Mechanics Model for Predicting FLC of AA5754 under Warm Forming Conditions

Mohamed

Shi

Lin

et al. 2015

AMM

View full text Add to dashboard Cite

This paper presents a novel strain-based continuum damage mechanics (CDM) model for predicting forming limit curve (FLC) of AA5754 under warm forming conditions. The model is formulated and calibrated based on two different sets of experimental data; isothermal uniaxial tensile data at temperature range of 20-300°C and strain rate range of 0.001-10 s-1and isothermal FLC data at temperatures range of 20-300°C and forming speeds of 20-300 mm s-1. A good agreement has been achieved between the experimental and numerical results.

show abstract

“…An FLC is influenced by several factors including: sheet thickness (Fatmaoui et al, 2008), strain hardening exponent (Djavanroodi and Derogar, 2010), strain rate and grain size (Kro¨hn et al, 2007) and temperature (Palumbo et al, 2010). A number of researchers have provided different analytical models for predicting FLCs.…”

Section: Introductionmentioning

confidence: 99%

The development of continuum damage mechanics-based theories for predicting forming limit diagrams for hot stamping applications

Lin

Mohamed

Balint

et al. 2013

International Journal of Damage Mechanics

View full text Add to dashboard Cite

This paper presents a novel plane-stress continuum damage mechanics (CDM) model for the prediction of the different shapes of forming limit diagrams (FLCs) for aluminium alloys under hot stamping conditions. Firstly, a set of uniaxial viscoplastic damage constitutive equations is determined from tensile experimental data of AA5754 at a temperature range of 350-550 C and strain rates of 0.1, 1.0 and 10 s À1 . The tests were carried out on Gleeble materials simulator (3800). Based on the analysis of features of FLCs for different materials forming at different temperatures, a plane-stress damage equation is proposed to take account the failure of materials at different stress-state sheet metal forming conditions. In this way, a set of multiaxial viscoplastic damage constitutive equations is formulated. The model is calibrated from the FLC data at temperature of 350 C and strain rate of 1.0 s À1 for AA5754. A good agreement has been achieved between the experimental and numerical data. The effect of the maximum principal stress, effective stress and hydrostatic stress on the materials failure features and on the shape of FLCs is studied individually and in combination. Using the newly developed plane-stress unified viscoplastic damage constitutive equations, the FLC of materials can be predicted at different temperatures and strain rate forming conditions.

show abstract

Intrinsic diagram of sheet metal forming limits for arbitrary strain paths

Cited by 5 publications

References 23 publications

A Review on Formability Prediction and Conistituve Damage Models of Sheet Forming of Magnesium Alloys

A Review on Formability Prediction and Conistituve Damage Models of Sheet Forming of Magnesium Alloys

Strain-Based Continuum Damage Mechanics Model for Predicting FLC of AA5754 under Warm Forming Conditions

The development of continuum damage mechanics-based theories for predicting forming limit diagrams for hot stamping applications

Contact Info

Product

Resources

About