Frédéric Barlat

Biography

Professor Frédéric Barlat is a French/American scientist in the field of plasticity, damage and metal forming. He is currently the director of A&S Center at Graduate Institute of Ferrous Technology at Pohang University of Science and Technology (POSTECH University) in South Korea. Professor Barlat's contribution in the field of plasticity, particularly his models on plastic anisotropy of metallic materials, has been recognized world-widely.

Professor Frédéric Barlat finished his undergraduate and master's degree at Ecole Nationale Supérieure d’Arts et Métiers, France in 1980. He finished his PhD in Mechanical Engineering from Grenoble Institute of Technology in France in 1984. Immediately after finishing his PhD he started his career as a researcher associate at Alcoa Technical Center in Pittsburgh, USA. In 1986 he became an assistant professor at Grenoble Institute of Technology in France. After one year he returned to Alcoa research center as a senior engineer, where he worked for 20 years. In 2007, he joined Pohang University of Science and Technology in South Korea as a professor.

Constitutive Models

Professor Frédéric Barlat is highly recognized in the plasticity, damage, and metal forming communities. He has innovated and developed several brilliant constitutive models for anisotropic plasticity of metallic materials including:
- A family of Barlat's yield criteria:

• Barlat's 89 model: Plastic behavior and stretchability of sheet metals. Part I: A yield function for orthotropic sheets under plane stress conditions;
• Barlat's 91 model: A six-component yield function for anisotropic materials;
• Yld2000-2D: Plane stress yield function for aluminum alloy sheets;
• Yld2004-18p: Linear transformation-based anisotropic yield functions;

- Barlat's constitutive model for non-isotropic hardening (cyclic loading) of metallic materials:

• Homogeneous-Anisotropic-Hardening (HAH) model: An alternative to kinematic hardening in classical plasticity

Awards

Because of his lifelong outstanding achievements in the field of plasticity, damage and metal forming, Prof. Barlat has been awarded world-widely:

• In 2016 he became an honorary member of Romanian Academy
• In 2013 he received the Khan Plasticity Award
• In 2011 Chinese Academy of Science presented him the Lee Hsun Lecture Award
• In 2006 he received the International Journal of Plasticity Awards
• In 1995 he received the ASM Henry Marion Howe Medal of the Material Society

Research Topics

Frederic Barlat is actively working on the following subjects:

• Advanced material characterization and forming processes
• Meso- and macro-scale constitutive modeling of plasticity
• Numerical simulations of forming processes

Teaching

The following courses are given by Frederic Barlat at the Graduate Institute of Ferrous Technology:

• Plasticity and Forming
• Ductile and Brittle Fracture
• Experimental Mechanics

Mentorship

Professor Barlat has directly supervised several graduate students since he joined the Graduate Institute of Ferrous Technology. Here is the list of completed projects:

• 2011:

1. Constitutive Modeling of High Strength Steel Sheets (PhD thesis: Le Xu)

• 2013:

1. Analysis of Hot Press Formed Parts with Tailored Strength (PhD thesis: Choi Jongwon)
2. Frictional Behaviors of a TRIP780 and a Mild Steel under a wide range of Contact Stresses and at various Sliding Velocity (MSc. thesis: Lee Jeonguk)

• 2014:

1. Application of self-consistent crystal plasticity framework as a constitutive description for commercial steel sheets (PhD thesis: Jeong Youngung)
2. Finite Element Analysis in Sheet Metal Forming of Advanced High Strength Steels (PhD thesis: Lee Jinwoo)
3. Simulations of Hot Press Forming with Advanced Thermo-Mechanical-Metallurgical Finite Element Modeling (PhD thesis: Bok Hyunho)
4. Advanced experiments for the AHSS (MSc. thesis: Seo Juwon)

• 2015:

1. Effects of Plastic Strain, Arc welding and Tempering on Fatigue Property of Automotive Hot Rolled Steels (PhD thesis: Kwon Hyuksun)
2. Forming of Ultra-Thin Ferritic Stainless Steel Sheets (PhD thesis: Bong Hyukjong)
3. Constitutive and Friction Modeling for Robust Springback Prediction of Advanced High Strength Steel Sheets (PhD thesis: Lee Jeongyeon)
4. Crystal Plasticity Investigation of Ridging Mechanisms in Ferritic Stainless Steels (PhD thesis: Chung Yangjin)
5. Enhanced Formability of AHSS Using a Non-conventional Forming Approach (PhD thesis: Omid Majidi)

• 2016:

1. Transformation Kinetics and Density Models of Q&P Steel for Potential Press-Hardening Applications (PhD thesis: Kim Seok-Nyeon)
2. Macro- and Meso-scopic Finite Element Modeling of Strain Path-Induced Plastic Anisotropy Evolution in Steel Sheet (PhD thesis: Ha Jinjin)
3. Heat Transfer Ceofficient Calculations between Tool and Boron Steel Blanks for HPF (MSc. thesis: Kim Hakrae)
4. Application of the Virtual Fields Method to High Strain Rate Testing (MSc. thesis: Lim Do Hyun)

• 2017:

1. Modeling of Yield Surface Evolution in Uniaxial and Biaxial Loading Conditions Using a Pre-strained Large-scale Specimen (MSc. thesis: Shakil Bin Zaman)
2. Characterization of Fracture in Medium Mn Steel (MSc. thesis: Choi Hong Ki)
3. Springback Prediction of AHSS Sheets in Double-stage Forming Using Advanced Constitutive Modeling (PhD thesis: Ji Sik Choi)
4. Characterization of Fracture in TRIP1180 (MSc. thesis: Choi Won Seok)

• 2018:

1. Effect of Rolling Parameters on Surface Strain Variation in Hot Strip Rolling (PhD thesis: Kim Kyung Seok)
2. Characterization of Dynamic Hardening Behavior at Intermediate Strain Rates Using the Virtual Field Method (MSc. thesis: Park Jin Seong)

References

1. Materials Mechanics Lab (Prof. Barlat's research laboratory at POSTECH University)
2. Prof. Barlat's publications (according to Scopus)
3. Barlat's 89 model
4. Barlat's 91 model
5. Yld2000-2D model
6. Yield 2004-18p
7. Barlat's HAH model
8. Yield surface