연구성과 1 페이지 | 포항공과대학교 친환경소재대학원

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12

MML [MML]Prof.Frederic Barlat : Finite element implementation of hydrostatic pressure-sensitive plasticity and its application to distortional hardening model and sheet metal forming simulations In this work, the hydrostatic pressure-dependency of the distortional plasticity model HAH20 was implemented using a finite element (FE) code to account for the strength-differential (SD) effect that has been observed in advanced high..

작성자 최고관리자 작성일 2022-08-04
11

MML [MML]Prof.Frederic Barlat : Investigation of Elastic Modulus Degradation and Recovery with Time and Baking Process for Deformed Automotive Steel Sheets This study investigated the elastic recovery phenomenon with elapsed time and heat treatment after the plastic deformation of automotive steel sheets. A conventional uniaxial loading–unloading-loading test was modified to include the ..

작성자 최고관리자 작성일 2022-08-04
10

MML [MML] Prof. F. Barlat: Calibration of Distortional Plasticity Framework and Application to U-draw Bending Simulations A new version of a distortional plasticity framework, the so-called homogeneous anisotropic hardening (HAH), was investigated regarding its calibration and its application to the numerical analysis of the U-draw bend test. First, the mech..

작성자 최고관리자 작성일 2021-08-25
9

MML [MML] Prof. F. Barlat: Performance review of various uncoupled fracture criteria for TRIP steel sheet The exact numerical description of ductile fracture for advanced high strength steel (AHSS) sheets, particularly for different deformation modes, is an ongoing issue for the sheet metal research community at large. Although, in the last few..

작성자 최고관리자 작성일 2021-08-25
8

MML [MML] Prof. F. Barlat, Determining the coefficients of a homogeneous anisotropic hardening model for ultrathin steel sheets In the present work, the constitutive description of a 0.1-mm-thick ferritic stainless steel sheet was optimized for application to springback simulations after bending. Springback simulations require Bauschinger effects to be characterized..

작성자 최고관리자 작성일 2020-02-23
7

MML [MML] Prof. F. Barlat, Failure characteristics of advanced high strength steels at macro and micro scales The advanced high strength steels (AHSS) have gained major attention from research groups across the world especially in the last two decades. The exact description of the forming behavior of these steels has several challenges associated w..

작성자 최고관리자 작성일 2020-02-23
6

MML [MML] Prof. F. Barlat: Influence of Yield Stress Determination in Anisotropic Hardening Model on Springback Prediction in Dual-Phase Steel In this study, a numerical sensitivity analysis of the springback prediction was performed using advanced strain hardening models. In particular, the springback in U-draw bending for dual-phase 780 steel sheets was investigated while focusi..

작성자 최고관리자 작성일 2019-02-28
5

MML [MML] Porf. F. Barlat: Identification of Dynamic Flow Stress Curves Using the Virtual Fields Methods: Theoretical Feasibility Analysis An inverse approach based on the virtual fields method (VFM) is presented to identify the material hardening parameters under dynamic deformation. This dynamic-VFM (D-VFM) method does not require load information for the parameter identific..

작성자 최고관리자 작성일 -0001-11-30
4

MML [MML] Prof. F. Barlat: Influence of Yield Stress Determination in Anisotropic Hardening Model on Springback Prediction in Dual-Phase Steel In this study, a numerical sensitivity analysis of the springback prediction was performed using advanced strain hardening models. In particular, the springback in U-draw bending for dual-phase 780 steel sheets was investigated while focusi..

작성자 최고관리자 작성일 2019-02-28
3

MML [MML] Prof. F. Barlat: A crystal plasticity model for describing the anisotropic hardening behavior of steel sheets during strain-path changes In the present study, a viscoplastic self-consistent crystal plasticity model (VPSC-RGBV), which accounts for various microstructural features, including the accumulation and annihilation of dislocations due to slip activity and latent..

작성자 최고관리자 작성일 2019-02-28
2

MML [MML] Prof. F. Barlat: Advanced constitutive modeling of advanced high strength steel sheets for springback prediction after double stage U-draw bending In this study, a U-shaped channel formed using a double drawing process (double stage U-draw bending) was proposed to reduce the amount of springback in the AHSS sheets. The performance of the double stage U-draw bending process in red..

작성자 최고관리자 작성일 2019-02-28
1

MML [MML] Prof. F. Barlat: Anisotropic Plasticity and Application to Plane Stress (Encyclopedia) Definitions Plasticity is the ability of a material to deform in an irreversible manner. Unlike elasticity for which deformations are reversible, plasticity leads to permanent shape changes after a sufficient load is applied to a mater..

작성자 최고관리자 작성일 2019-02-28

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