Article
Materials Science, Multidisciplinary
Boxun Wu, Honghao Wang, Akira Yoshimura, Tom Taylor, Nan Liu, Jun Yanagimoto
Summary: An anisotropic plasticity model based on the non-associated flow rule with anisotropic hardening was developed. It accurately describes the plastic behavior of orthogonal anisotropic sheet metals and properly reproduces the cyclic effect during forming processes. The model has high accuracy and efficiency in capturing anisotropic behaviors including anisotropic hardening and cyclic hardening.
MECHANICS OF MATERIALS
(2021)
Article
Materials Science, Multidisciplinary
Lukas Schell, Erik Sellner, Michael Massold, Peter Groche
Summary: Conventional tribometers have been developed for sheet metal forming at room temperature, but there are challenges in warm and hot forming processes of high-strength aluminum. This study investigates the transferability of friction and wear behavior using three different lubricants and temperatures. Comparison is made between tribometer test results, real forming trials, and thermomechanical finite element simulations to discuss the behavior of different lubricants and tool lubrication characteristics in sheet metal forming.
ADVANCED ENGINEERING MATERIALS
(2023)
Article
Automation & Control Systems
Teng Xu, Zhicong Dai, Jianbin Huang, Shihao Dou, Jiaqi Ran, Feng Gong
Summary: In this paper, ultrasonic vibration-assisted deep drawing technology is proposed to control the adhesive wear of tantalum capacitor shell. The influence of ultrasonic vibration on deep drawing force and surface forming accuracy of tantalum cup deep drawing is discussed. The results reveal that an amplitude of 5 μm has the best inhibition effect on adhesive wear during the deep drawing process, reducing wearing by more than 22%.
INTERNATIONAL JOURNAL OF ADVANCED MANUFACTURING TECHNOLOGY
(2023)
Article
Automation & Control Systems
Dongdong You, Dongqing Cai, Yunhao Wang, Fuqiang Zhou, Zonglong Ruan
Summary: This study proposed a reverse drawing method for the fabrication of aluminum alloy sheet parts and discussed two modes of forming. The results showed that the blank holder force and pressure loading path significantly affect the formability of the final part. Wrinkles in the curved surface area can be alleviated by reducing the blank holder force and increasing hydraulic pressure, and wrinkles and cracks can be eliminated by using the HMRD process.
INTERNATIONAL JOURNAL OF ADVANCED MANUFACTURING TECHNOLOGY
(2022)
Article
Metallurgy & Metallurgical Engineering
Bohye Jeon, Min-Seong Kim, Shi-Hoon Choi, Youngung Jeong
Summary: The mechanical behavior of a magnesium alloy E-form under bending was investigated using a polycrystal model and its finite element implementation. The model successfully captured the inhomogeneous stress response and was validated by comparing with experimental results. Additionally, the study found that the bendability of the magnesium alloy could be improved by weakening the initial texture.
JOURNAL OF MAGNESIUM AND ALLOYS
(2023)
Article
Engineering, Industrial
Shohei Kajikawa, Takashi Kuboki, Takashi Iizuka
Summary: This paper introduces a method of flange compression using a stepped punch and die to produce an extremely deep cup with a flange from sheet metal. By optimizing forming parameters and proposing a two-step forming process, deep cups with different length-to-diameter ratios were successfully obtained.
JOURNAL OF MATERIALS PROCESSING TECHNOLOGY
(2021)
Article
Engineering, Mechanical
L. Schell, M. Emele, A. Holzbeck, P. Groche
Summary: This paper investigates the temperature influence on friction and wear performance in different lubricant classes and the bonding performance of lubricants to die surfaces. The results provide guidance for future lubricant developments.
TRIBOLOGY INTERNATIONAL
(2022)
Article
Engineering, Manufacturing
Takayuki Hama, Kaho Hirano, Ryo Matsuura
Summary: Due to the strong anisotropy in mechanical properties, defects often occur during the press forming of commercially pure titanium (CP-Ti) sheets, including earing formation. However, the predictive accuracy of finite-element simulations for CP-Ti sheet drawing processes is still not satisfactory. This study employs a crystal plasticity model to conduct finite-element simulations of a cold-rolled Grade 2 CP-Ti sheet cup drawing process and examines its applicability by comparing it with experimental results. The simulation qualitatively captures the overall tendencies well but has some discrepancies with experimental results. The mechanisms behind these discrepancies are examined, and parametric studies are conducted to discuss the effects of twinning activity and friction on drawability.
INTERNATIONAL JOURNAL OF MATERIAL FORMING
(2022)
Article
Multidisciplinary Sciences
Jiansheng Xia, Jun Zhao, Shasha Dou, Xing Shen
Summary: Friction is an important factor in sheet metal forming, affecting dynamic behaviors and stress-strain distributions. A new theoretical model based on plastic flow law and partitioning was used to analyze deformation characteristics and stress-strain distribution in deep drawing. Experimental results verified the accuracy of the model, showing that the drawing force increased with punch depth, while the friction coefficient decreased.
Article
Engineering, Civil
Dibya Ranjan Behera, Bhupesh Singh Katiyar, Sayan Das, Sushanta Kumar Panda, Sujoy Kumar Kar, S. V. S. Narayana Murty
Summary: Recently, a laboratory-scale two-stage deep drawing setup was designed and developed for the fabrication of large-depth thrust chamber liners used in satellite launch vehicles. The setup successfully drew cylindrical cups of Cu-Cr-Zr-Ti alloy sheets of 1.7 mm thickness. Finite element analysis was used to design the setup and capture the deformation behavior. Through experiments, cups with a maximum depth of 58.5 mm and increased surface roughness were achieved. The aging behavior of the redrawn cups was also analyzed, revealing the formation of fine Cr-rich precipitates at 500°C for 2 hours.
ARCHIVES OF CIVIL AND MECHANICAL ENGINEERING
(2023)
Article
Materials Science, Multidisciplinary
Silin Luo, Gang Yang, Yanshan Lou, Yongqian Xu
Summary: The study investigated the influence of strain path changing on an aluminum alloy and found that the shear ductile fracture criterion could reasonably describe this effect on forming limit curves. However, the accuracy of predictions for some bilinear paths was poor.
Article
Materials Science, Multidisciplinary
Rui Shi, Siji Qin, Qianrong Zhang, Xueyang Li, Haodong Chen
Summary: This research provides mathematical proof and experimental validation that the flat-bottom region of axisymmetric curved parts is in an equibiaxial tensile stress state when using an axisymmetric flat-bottom punch. The direct integral method is supplemented and improved to obtain strain distributions in different regions.
JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE
(2022)
Article
Engineering, Mechanical
The-Thanh Luyen, Duc-Toan Nguyen
Summary: This study investigated the impact of elevated temperatures, blank holder force, and punch radius on the thickness distribution of cylindrical cups in the deep drawing of SPCC sheet steel. Numerical simulations and experiments were conducted to evaluate the performance of the hardening equation in simulating the deformed shapes of cylindrical cups. The results showed that the thinness of the cups increased at elevated temperatures and the optimal parameters were determined to achieve uniform thickness distribution.
JOURNAL OF THE BRAZILIAN SOCIETY OF MECHANICAL SCIENCES AND ENGINEERING
(2023)
Article
Automation & Control Systems
Yuan Yuan Mu, Feng Li, Chao Li, Yun Qi Zang, Jie Xu
Summary: This paper proposes a composite method of inverse bulge pre-deformation deep-drawing based on intelligent magnetorheological (MR) fluid material. The research results show that the uniformity of the wall thickness of the parts is enhanced after using the soft mold medium, and the distribution of equivalent stress changes as the height of the inverse bulge increases.
INTERNATIONAL JOURNAL OF ADVANCED MANUFACTURING TECHNOLOGY
(2021)
Article
Engineering, Manufacturing
Qing Zhang, Yong Zhang, Yuantao Sun, Dateng Zheng
Summary: Al-Mg alloys exhibit anisotropy, temperature softening, and strain rate hardening in warm forming conditions. Previous research has not combined viscoplastic models with advanced yield functions for warm forming simulation, especially using an implicit finite element program. In this study, a viscoplastic model was successfully implemented with advanced yield functions for warm forming simulation of AA5182-O alloy, showing good agreement between simulation and experimental results.
INTERNATIONAL JOURNAL OF MATERIAL FORMING
(2021)
Article
Mathematics, Interdisciplinary Applications
Adnan Eghtesad, Marko Knezevic
COMPUTATIONAL PARTICLE MECHANICS
(2018)
Article
Materials Science, Multidisciplinary
Adnan Eghtesad, Timothy J. Barrett, Marko Knezevic
Review
Materials Science, Multidisciplinary
Marko Knezevic, Irene J. Beyerlein
ADVANCED ENGINEERING MATERIALS
(2018)
Article
Computer Science, Interdisciplinary Applications
Adnan Eghtesad, Kai Germaschewski, Irene J. Beyerlein, Abigail Hunter, Marko Knezevic
ADVANCES IN ENGINEERING SOFTWARE
(2018)
Article
Materials Science, Multidisciplinary
Timothy J. Barrett, Daniel J. Savage, Milan Ardeljan, Marko Knezevic
COMPUTATIONAL MATERIALS SCIENCE
(2018)
Article
Engineering, Mechanical
Isaac Chelladurai, Devin Adams, David T. Fullwood, Michael P. Miles, Stephen Niezgoda, Irene J. Beyerlein, Marko Knezevic
INTERNATIONAL JOURNAL OF PLASTICITY
(2019)
Article
Engineering, Mechanical
Milovan Zecevic, Marko Knezevic
INTERNATIONAL JOURNAL OF PLASTICITY
(2018)
Article
Engineering, Mechanical
Saeede Ghorbanpour, Brandon A. McWilliams, Marko Knezevic
FATIGUE & FRACTURE OF ENGINEERING MATERIALS & STRUCTURES
(2019)
Article
Engineering, Mechanical
Saeede Ghorbanpour, Md Ershadul Alam, Nicholas C. Ferreri, Anil Kumar, Brandon A. McWilliams, Sven C. Vogel, Jonathan Bicknell, Irene J. Beyerlein, Marko Knezevic
INTERNATIONAL JOURNAL OF PLASTICITY
(2020)
Article
Materials Science, Multidisciplinary
C. M. Poulin, T. J. Barrett, M. Knezevic
EXPERIMENTAL MECHANICS
(2020)
Article
Engineering, Manufacturing
Camille M. Poulin, Sven C. Vogel, Yannis P. Korkolis, Brad L. Kinsey, Marko Knezevic
INTERNATIONAL JOURNAL OF MATERIAL FORMING
(2020)
Article
Materials Science, Multidisciplinary
Nicholas C. Ferreri, Reeju Pokharel, Veronica Livescu, Donald W. Brown, Marko Knezevic, Jun-Sang Park, Michael A. Torrez, George T. Gray
Article
Engineering, Mechanical
Timothy Barrett, Marko Knezevic
INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
(2020)
Article
Materials Science, Multidisciplinary
Iftekhar A. Riyad, William G. Feather, Evgenii Vasilev, Ricardo A. Lebensohn, Brandon A. McWilliams, Adam L. Pilchak, Marko Knezevic
Summary: This paper presents a multi-level crystal plasticity-based simulation framework for modeling mechanical response and microstructure evolution of Ti-6A1-4V with alpha-lath/lamellar microstructures. The model successfully interprets the deformation behavior and texture evolution of the material, demonstrating the capability of predicting plastic anisotropy/asymmetry and the concomitant texture evolution.
Article
Materials Science, Multidisciplinary
Russell E. Marki, Kyle A. Brindley, Rodney J. McCabe, Marko Knezevic
Summary: This paper presents a mathematical procedure for invertible microstructure-property linkages for orthorhombic polycrystalline metals using the generalized spherical harmonics (GSH) spectral basis. The procedure allows for the computation of property closures and enables the simulation of microstructurally heterogeneous components under thermo-mechanical loadings in a computationally efficient manner. The developed framework has been demonstrated using alpha-uranium as a case study.
JOURNAL OF NUCLEAR MATERIALS
(2022)