Experimental and numerical determination of thermal forming limit diagrams (TFLD) of high strength steel 22MnB5

Shi, D. Y.; Ying, L.; Hu, P.; Lu, J. D.; Zhao, X.; Liu, W. Q.
May 2013
AIP Conference Proceedings;May2013, Vol. 1532 Issue 1, p406
Academic Journal
High strength steel components are increasingly being considered for use in vehicle structures due to the potential for higher strength to weight ratio, fuel economy improvement and emission reduction. However, high strength steel's poor ductility at room temperature requires sheet forming to be carried out in hot forming method. The Thermal Forming Limit Diagram (TFLD) is an important primary criterion to determine how close the sheet metal is to tearing when it is formed into a product shape in hot forming process. In this work, an efficient experimental set-up named TFLD 300 which is based on Nakajima test has been developed. Several experiments for hot forming limits of high strength steel 22MnB5 were performed and the forming limit curves at different temperatures are obtained. Then the three-dimensional TFLD which considers temperature history and strain path is constructed. As an evaluation criterion for formability, the three-dimensional TFLD is introduced into KMAS (King Mesh Analysis System), which is independently developed commercial CAE software and can be used for hot forming simulation. Subsequently, a typical B-pillar's hot forming process with varying process conditions have been simulated by using the KMAS software. And the corresponding experiment results confirm that the KMAS software and three-dimensional TFLD can accurately predict the fracture of sheet metal in hot forming.


Related Articles

  • Simulation of hydration and cracking propagation with temperature effect based on fuzzy logic theory. Štemberk, P.; Rainová, A. // Mechanika;2011, Vol. 17 Issue 4, p358 

    This paper deals with the influence of temperature and temperature history on the development of hydration heat in concrete structures and on evaluation of temperature distribution in early-age concrete. The main objective of this work is estimation of temperature influence on hydration progress...

  • Analysis and computations of oscillating crack propagation in a heated strip. Menouillard, Thomas; Belytschko, Ted // International Journal of Fracture;Jan2011, Vol. 167 Issue 1, p57 

    This paper presents a computational analysis and several simulations of an existing experiment, which deals with a quasi-static thermal crack propagation in a glass plate. The experimental observation was that a straight or oscillatory crack propagation occurred depending on the plate width and...

  • Investigations into the material failure of resistance weld spots on ultrahigh-strength steels. Pfestorf, Markus; Brandhuber, Martin // Welding & Cutting;2010, Issue 3, p167 

    The passive safety of a vehicle is primarily designed according to a large number of statutory and consumer protection requirements from various countries and markets. In order to satisfy the requirements resulting from them, a decisive role is played by the functional design of the body...

  • Evaluation of thermal debinding of injection-molded boron carbide in an ambient atmosphere. Wang, Changrui; Lu, Zhen; Zhang, Kaifeng // International Journal of Advanced Manufacturing Technology;Feb2013, Vol. 64 Issue 9-12, p1751 

    Characterization of thermal debinding of boron carbide green samples in an ambient atmosphere with the temperature range of 350 to 500 °C was investigated. Binders are easier to remove in the ambient atmosphere because of the continuous oxygen supply. XRD results show that the diffraction...

  • Diametrical growth in the forward flow forming process: simulation, validation, and prediction. Song, X.; Fong, K.; Oon, S.; Tiong, W.; Li, P.; Korsunsky, Alexander; Danno, A. // International Journal of Advanced Manufacturing Technology;Mar2014, Vol. 71 Issue 1-4, p207 

    In the present study, the phenomenon of diametric growth in the forward flow forming process has been studied through finite element simulation and experimental investigation. Implicit integration scheme was employed in the simulation to achieve good accuracy for diametric growth prediction. The...

  • Numerical Analysis of Sample-Size Effect on Strength of Alumina. Hoshide, Toshihiko; Sugiyama, Hiroyuki // Journal of Materials Engineering & Performance;Jan2013, Vol. 22 Issue 1, p1 

    Statistical characteristics of strength distribution in ceramic components should be clarified because of large scatter in ceramics strength. Characteristics of strength distribution, however, depend on sample size, i.e., the number of tested specimens. In this study, a numerical procedure in...

  • Simulation and Reliability Study of Cu/Low-k Devices in Flip-chip Packages. Zhao, Jie-Hua; Wilkerson, Brett; Uehling, Trent // AIP Conference Proceedings;2004, Vol. 741 Issue 1, p52 

    The package impact to the mechanical integrity of the low dielectric constant (low-k) dielectrics back end of the line (BEOL) structure has been proven to be significant in recent publications. This work reports a simulation study of the package-induced delamination in low-k structures by...

  • A computational strategy for the localization and fracture of laminated composites. Part 1. Development of a localization criterion adapted to model damage evolution time-delay. Boutaous, A.; Elchikh, M.; Abdelouahab, M.; Belaidi, A. // Strength of Materials;Aug2011, Vol. 43 Issue 5, p519 

    A criterion of instability and localization adapted for modeling the damage evolution with delay effect on a homogeneous laminate composite T300/914 beam is proposed. In the one-dimensional case, the results obtained have revealed the existence of a simultaneous rupture zone in the entire...

  • FEA for METALFORMING.  // Machine Design;7/8/2010, Vol. 82 Issue 12, p48 

    The article focuses on the effectiveness of Deform simulation software to detect catastrophic die failure of metals and formation of chevron cracks during metalforming processes. It states that finite-element method (FEM) is applied to determine the factors that affect ductile fracture of...


Read the Article


Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics