• Effect of Stretching on Springback in Rotary Stretch Bending of Aluminium Alloy Profiles 

      Ma, Jun; Welo, Torgeir; Blindheim, Jørgen; Ha, Taekwang (Journal article, 2021)
      Stretch bending is widely used for manufacturing profile-type parts. However, one of the challenges faced by the bending-type forming processes is springback, which significantly reduces the dimensional accuracy of formed ...
    • Exploring the Influence of Pre/Post-Aging on Springback in Al-Mg-Si Alloy Tube Bending 

      Ma, Jun; Ha, Taekwang; Blindheim, Jørgen; Welo, Torgeir; Ringen, Geir; Li, Heng (Peer reviewed; Journal article, 2020)
      Aluminium alloy (Al-alloy) bent tube is one kind of strategic lightweighting components, which attracts application in industrial clusters, such as automobile, aerospace, etc. To meet the demands on high-precision ...
    • A feasibility study of continuous grain refinement of sheet metal 

      Ha, Taekwang; Murudkar, Rahul; Hartwig, Karl; Welo, Torgeir; Ringen, Geir; Wang, Jyhwen (Peer reviewed; Journal article, 2020)
      Various severe plastic deformation (SPD) techniques have been used to develop ultrafine-grained (UFG) materials to enhance material properties. Equal channel angular extrusion/pressing (ECAE/ECAP) is an effective technique ...
    • Flexible 3D Stretch Bending of Aluminium Alloy Profiles: An Experimental and Numerical Study 

      Welo, Torgeir; Ma, Jun; Blindheim, Jørgen; Ha, Taekwang; Ringen, Geir (Peer reviewed; Journal article, 2020)
      Three-dimensionally (3D) shaped extrusions are attracting increased attention in order to meet the ever-growing demands on weight reduction to obtain lower emissions in the automobile industry. With the current transformation ...
    • In-line Springback Measurement for Tube Bending Using a Laser System 

      Ha, Taekwang; Ma, Jun; Blindheim, Jørgen; Welo, Torgeir; Ringen, Geir; Wang, Jyhwen (Peer reviewed; Journal article, 2020)
      Tube bending process is extensively used for many industrial fields such as the automotive, shipbuilding, and aircraft manufacturing industries. However, one limitation of the tube bending process is that it is not easy ...
    • On measuring, prediction and control of 3D profile bending towards Industry 4.0 

      Ha, Taekwang (Doctoral theses at NTNU;2022:346, Doctoral thesis, 2022)
      Aluminum profile bending is one of the methods providing potential to reduce weight and improve fuel efficiency in automotive, aerospace, and other industries. Most of manufacturers make efforts to reduce the number of ...
    • A strategy for on-machine springback measurement in rotary draw bending using digital image-based laser tracking 

      Ha, Taekwang; Welo, Torgeir; Ringen, Geir; Wang, Jyhwen (Peer reviewed; Journal article, 2021)
      Rotary draw bending is a commonly used metal forming technique for profile bending. Due to the elastic recovery of the material, springback compensation to control the bent product quality is one of the critical manufacturing ...
    • Structure-Processing-Property Relationships of 3D Printed Porous Polymeric Materials 

      Cipriani, Ciera; Ha, Taekwang; Martinez Defilló, Oliver; Myneni, Manoj; Wang, Yifei; Benjamin, Chandler; Wang, Jyhwen; Pentzer, Emily; Wei, Peiran (Peer reviewed; Journal article, 2021)
      Imparting porosity to 3D printed polymeric materials is an attractive option for producing lightweight, flexible, customizable objects such as sensors and garments. Although methods currently exist to introduce pores into ...