Prof. Mansoo Joun

School of Mechanical Engineering, Gyeongsang National University, Jinju, South Korea

Prof. Mansoo Joun

School of Mechanical Engineering, Gyeongsang National University, Jinju, South Korea

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Academic Career Length

20Years (2007-Present)

(Calculated once Scilit publication data is synced: current year − year of first publication + 1)

Representative Publications

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1 March 2021 in Journal of Materials Research and Technology

Journal Article

A new approach of predicting dynamic recrystallization using directly a flow stress model and its application to medium Mn steel

Mohd Kaswandee Razali

Mansoo Joun

1 April 2020 in IOP Conference Series: Materials Science and Engineering

Conference Paper

Recent Advances in Metal Forming Simulation Technology for Automobile Parts by AFDEX

Mansoo Joun

In this presentation, hot issues of metal forming simulation are presented, including intelligent remeshing, flow stress modelling and material identification, friction, material model, complete analysis, quality quantification and optimal process design, multi-body forming simulation technology, sheet and plate forging by bulk finite element, etc. Some selected success stories for recent two decades are also introduced with a lot of industrial applications, especially to automobile industries. Finally, some futuristic research works are introduced for weight reduction and maximized life-span of auto-parts to save the global environments and some suggestion of international cooperation for the common pursuit is stated in conclusion.

11 April 2022 in The International Journal of Advanced Manufacturing Technology

Journal Article

Implicit elastoplastic finite element analysis of tube-bending with an emphasis on springback prediction

Nurul Aqilah Razali

Suk Hwan Chung

Wan Jin Chung

Mansoo Joun

23 November 2020 in Materials

Journal Article

Automatic Multi-Stage Cold Forging of an SUS304 Ball-Stud with a Hexagonal Hole at One End

Jong Bok Byun

Mohd Kaswandee Razali

SUS304 stainless steel is characterized by combined tensile and compression testing, with an emphasis on flow stress at higher strain and temperature. The plastic deformation behavior of SUS304 from room temperature to 400 °C is examined and a general approach is used to express flow stress as a closed-form function of strain, strain rate, and temperature; this is optimal when the strain is high, especially during automatic multi-stage cold forging. The fitted flow stress is subjected to elastothermoviscoplastic finite element analysis (FEA) of an automatic multi-stage cold forging process for an SUS304 ball-stud. The importance of the thermal effect during cold forging, in terms of high material strength and good strain-hardening, is revealed by comparing the forming load, die wear and die stress predictions of non-isothermal and isothermal FEAs. The experiments have shown that the predictions of isothermal FEA are not feasible because of the high predicted effective stress on the weakest part of the die.

8 April 2022 in Materials

Journal Article

A Review of Flow Characterization of Metallic Materials in the Cold Forming Temperature Range and Its Major Issues

Mansoo Joun

Mohd Kaswandee Razali

We focus on the importance of accurately describing the flow behaviors of metallic materials to be cold formed; we refer to several valuable examples. We review the typical experimental methods by which flow curves are obtained, in addition to several combined experimental-numerical methods. The characteristics of four fundamental flow models including the Ludwik, Voce, Hollomon, and Swift models are explored in detail. We classify all flow models in the literature into three groups, including the Ludwik and Voce families, and blends thereof. We review the experimental and numerical methods used to optimize the flow curves. Representative flow models are compared via tensile testing, with a focus on the necking point and pre- or post-necking strain hardening. Several closed-form function models employed for the non-isothermal analyses of cold metal forming are also examined. The traditional bilinear C-m model and derivatives thereof are used to describe the complicated flow behaviors of metallic materials at cold forming temperatures, particularly in terms of their applications to metal forming simulations and process optimization.

1 April 2019 in Journal of Materials Research and Technology

Journal Article

Experimental and numerical study on the temperature sensitivity of the dynamic recrystallization activation energy and strain rate exponent in the JMAK model

Missam Irani

Sugun Lim

Mansoo Joun

About Me

Prof. Man Soo Joun is a Professor at Gyeongsang National University (GNU) in South Korea. He graduated from Seoul National University for his bachelor's degree, from Korea Advanced Institute of Science and Technology (KAIST) for his master's degree, and from Pohang University of Science and Technology (POSTECH) for his Ph.D. degree. After his Ph.D., he developed and commercialized a general-purpose metal forming simulator called AFDEX, which is competitive in terms of solution accuracy and user-friendliness as an Altair APA software. He has constructed an international cooperative network based on AFDEX, involving ALTAIR (USA/Global), JSOL (Japan), BRIMET (China), ARAI/DHIO (India), MARii/UiTM (Malaysia), UNAM (Mexico), etc., and has organized MFCAE (Metal Forming CAE) for 23 years and GISPAM (GNU International Summer Program of AFDEX for the State of Mexico) for 6 years. He has been in charge of the Technology Innovation Center (TIC) of GNU for 18 years, which is the only TIC specializing in metal forming and powder forging in South Korea. His skills and expertise mainly include finite element analysis, finite element modeling, structural analysis, design engineering, CAD, modeling and simulation, mechanical properties, and mechanical behavior of materials.

Prof. Mansoo Joun

Prof. Mansoo Joun

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