A5011193674- Metal Forming Simulation Techniques
- Metallurgy and Material Forming
- Engineering Applied Research
- Laser and Thermal Forming Techniques
- Microstructure and mechanical properties
- Industrial Vision Systems and Defect Detection
- Fatigue and fracture mechanics
- High-Velocity Impact and Material Behavior
- Advanced Battery Technologies Research
- Manufacturing Process and Optimization
- Microstructure and Mechanical Properties of Steels
- Electric and Hybrid Vehicle Technologies
- Textile materials and evaluations
- Injection Molding Process and Properties
- Fuel Cells and Related Materials
- Additive Manufacturing and 3D Printing Technologies
- Optical measurement and interference techniques
- Aluminum Alloys Composites Properties
- Metal Alloys Wear and Properties
- Mechanical stress and fatigue analysis
- Aluminum Alloy Microstructure Properties
- Powder Metallurgy Techniques and Materials
- Energy and Environmental Systems
- Internet of Things and Social Network Interactions
- Advanced machining processes and optimization
Kongju National University
2015-2025
Green Technology Center
2024-2025
Samsung (South Korea)
2005-2015
Technical University of Munich
2007
Purdue University West Lafayette
1996-2000
In the automotive industry, extensive research has been conducted to eliminate factors negatively impacting product quality, such as wrinkles, cracks, and thickness distribution in components. The application of drawbeads often relies on experience field workers, leading considerable trial error before stabilizing production process. Therefore, efficiently transform these inefficiencies related time cost, there is a need for real-time predictive technology forming quality based position bead...
A dual flow characterization method of a combined elastoplastic finite element and tensile test (EP-CFTM) after the rigid-plastic (RP-CFTM) is presented for practical metals at large strains room temperature. It novel acquiring curve post-necking strain hardening (PostSH) region from cylindrical focusing on springback during PostSH. An iterative scheme proposed to obtain optimized EP-CFTM starting initial RP-CFTM curve. In method, iteratively improved by elastic deformation correction...
The torsion beam, integral to rear suspension systems in vehicles, is a critical component where strength and durability must be prioritized specific regions. To enhance the of these regions, induction hardening, localized heat treatment method, employed. However, application this introduces distortion, which compromises precision welding between components raises significant concerns about product quality safety. address challenges, present study front-end analysis process for hardening...
Governing void growth, stress triaxiality (η) is a crucial parameter in ductile damage prediction. η defined as the ratio of mean to equivalent and represents loading conditions. Attempts at introducing material anisotropy models have started only recently, rendering necessary in-depth investigation into role here. commonly derived via finite elemnt (FE) simulation. An alternative presented here: based on analytical expressions, obtained directly from strains critical zone. For anisotropic...
Electric vehicles (EVs) and hybrid electric (HEVs) are a new trend for the vehicle industry, due to environmental regulations of internal combustion engine (ICE) pollutant emission transportation. However, despite being very promising, durability battery, overheating, is still an obstacle. In particular, batteries manufactured with high voltage capacity ensure power energy efficiency. For this reason, temperature generated in system, which reduces battery performance life cycle. study, three...
Moving image quality has been the Achilles' heel of TFT-LCDs. The switching speed liquid crystals improved constantly, so that we now have reached to a point where further improvement does not translate into real gain: LCDs are facing final hurdle as hold-type display. Two ways were proposed overcome problem. One is introduce impulsive transmission and other increase refresh rate. first approach was commercialized, with limited success. second emulated high refresh-rate CRT. For time, report...
To meet requirements for reduced fuel consumption of cars, the use components made sheets high-strength steel instead conventional has been on rise. However, low ultimate elongation often causes problems during plastic deformation and more research is needed to improve failure predictability. Ductile models available in commercial finite element analysis (FEA) packages require material's tensile strength strain prediction. For stress states that are complex than uniaxial case, accurate...
Appliance manufacturers have traditionally performed physical testing using prototypes to assess reliability and service integrity of new product designs. However, for white goods where lives are measured in years or decades, the use endurance analyze long time is uneconomical. As accelerated life (ALT) more efficient less costly than traditional testing, methodology finding increased usage by appliance manufacturers. In present study, a simulation-based ALT approach was used predict...
A strain measurement method is proposed that defines an intrinsic flow stress equation for various rates using representative brittle and ductile polypropylene composites. Digital image correlation used to track at the local fracture point. Results are compared with those of gauge length method. Whereas up diffuse necking identical, regardless acquisition method, after completely dependent on specimen's location; hence, it underestimated if not in center. In material, deviation large because...