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Relevant bibliographies by topics / Limit Drawing Ratio (LDR)

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Academic literature on the topic 'Limit Drawing Ratio (LDR)'

Author: Grafiati

Published: 3 June 2025

Last updated: 31 July 2025

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Journal articles on the topic "Limit Drawing Ratio (LDR)"

1

Leu, Daw-Kwei, and Jen-Yu Wu. "A Simplified Approach to Estimate Limiting Drawing Ratio and Maximum Drawing Load in Cup Drawing." Journal of Engineering Materials and Technology 126, no. 1 (2004): 116–22. http://dx.doi.org/10.1115/1.1633574.

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A new and practically applicable equation, including the normal anisotropy R, the strain hardening exponent n, the friction coefficient μ, and the bending factor t0/rd for estimating the limiting drawing ratio LDR (a measure of drawability of sheet metal) in cup drawing of a cylindrical cup with a flat-nosed punch is derived by an elementary theory of plasticity in an explicit form. Whiteley’s and Leu’s equations for estimating the LDR, and Hill’s upper limit value of LDR, all are the special cases of the derived equation. The estimation of LDR agrees well with the experiment. It is shown that

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2

E., Karajibani, Fazli A., and Hashemi R. "Numerical and experimental study of formability in deep drawing of two-layer metallic sheets." International Journal of Advanced Manufacturing Technology 80, no. 1-4 (2015): 113–21. https://doi.org/10.1007/s00170-015-6978-5.

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In this paper, the formability of two-layer (aluminum-st12 steel) sheets in the deep drawing process was investigated through numerical simulations and experiments. The purpose of this research was to obtain more formability in deep drawing process. The limit drawing ratio (LDR) was obtained in deep drawing of two-layer metallic sheets, with aluminum inner layer which was in contact with the punch and steel outer layer which was in contact with the die. Finite element simulations were performed to study the effect of parameters such as the thickness of each layer, value of die arc radius, fric

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Qian, Jian Qing, Ji Ping Chen, and Hai Fan Qian. "The Influence of N Values on Sheet Metal Deep Drawing Based on Different Blank Holder Forces." Advanced Materials Research 418-420 (December 2011): 1364–67. http://dx.doi.org/10.4028/www.scientific.net/amr.418-420.1364.

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The influence of hardening index n value at different holding forces on LDR of cylinder cup was simulated by the finite element software PAM-STAMP 2G. The results showed that the limit drawing ratio of the sheet metal decreased with the increase of the blank holder force. There was little influence of hardening index n value on the limit drawing ratio at smaller blank holder force. The influence of hardening index n value on the limit drawing ratio increased with the increase of the blank holder force. The hardening index n value could be increased to increase the limit drawing ratio when the

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4

Huang, You Min, and Yi Wei Tsai. "Analyzing of Stainless Elliptical Cup Drawing Process." Key Engineering Materials 443 (June 2010): 116–21. http://dx.doi.org/10.4028/www.scientific.net/kem.443.116.

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A methodology of formulating an incremental elasto-plastic three-dimensional finite element model, which is based on Prandtl-Reuss flow rule and von Mises’s yield criterion respectively, associated with an updated Lagrangian formulation, is developed to simulate elliptical cup drawing process. An extended algorithm is proposed to formulate the boundary conditions, such as the yield of element, maximum allowable strain increment, maximum allowable rotation increment, maximum allowable equivalent stress increment, and tolerance for nodes getting out of contact with tool. In order to verify the r

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Yossifon, S., and J. Tirosh. "The Maximum Drawing Ratio in Hydroforming Processes." Journal of Engineering for Industry 112, no. 1 (1990): 47–56. http://dx.doi.org/10.1115/1.2899294.

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The concept of Maximum Drawing Ratio (MDR), supplementary to the well-known Limit Drawing Ratio (LDR), is defined, examined, and illustrated by experiments. In essence the MDR is reached when the two basic failure modes, namely: rupture (due to tensile instability) and wrinkling (due to buckling instability) are delayed till they occur simultaneously. Thus the process is beneficially utilized for higher drawing ratio by postponing earlier interception of either one of the above failures alone. The ability to suppress (up to a certain extent) the appearance of these failure modes depends heavil

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Huang, You Min, and Yi Wei Tsai. "Analysis of Elliptical Cup Drawing Process of SUS304 Stainless Metal." Advanced Materials Research 83-86 (December 2009): 350–57. http://dx.doi.org/10.4028/www.scientific.net/amr.83-86.350.

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A methodology of formulating an elasto-plastic three-dimensional finite element model, which is based on Prandtl-Reuss flow rule and von Mises yield criterion respectively, associated with an updated Lagrangian formulation. An extended r-min algorithm is proposed to formulate the boundary conditions, such as the yield of element, maximum allowable strain increment, maximum allowable rotation increment, maximum allowable equivalent stress increment, and tolerance for nodes getting out of contact with tool. In order to verify the reliability and accuracy of the FEM code, the fractured thickness

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7

Suhadi, Amin, Eka Febriyanti, Tri Handayani, and Rini Riastuti. "Pengaruh Suhu Dan Persentase Reduksi Terhadap Limit Drawing Ratio (LDR) Pada Proses Metal Forming Paduan 70Cu-30Zn [Effect of Temperature and Reduction Percentage to Limit Drawing Ratio (LDR) on Metal Forming of 70Cu-30Zn Alloy]." Metalurgi 31, no. 2 (2016): 79. http://dx.doi.org/10.14203/metalurgi.v31i2.126.

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Soomro, M. Waseem, R. Khan, and M. Akhtar. "Anisotropy and Forming Characteristics of Magnesium Alloy ZE10." Advanced Materials Research 488-489 (March 2012): 295–99. http://dx.doi.org/10.4028/www.scientific.net/amr.488-489.295.

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The current work investigates anisotropy and forming characteristics of ZE10 Mg alloy. Anisotropic effects are measured by analysing tensile tests data for the specimens from 0o, 45o and 90o rolling directions of thin sheet of 0.8 mm thickness. The effects of temperature and strain rates are also included in anisotropic analyses. The mechanical properties of ZE10 alloy are affected by the physical conditions like temperature and strain rates. The effect is significant on yield strength, UTS and fracture strain while small variation is observed in case of Young’s modulus. Deep drawing experimen

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9

Berger, Moshe, and Eyal Zussman. "On-Line Thinning Measurement in the Deep Drawing Process." Journal of Manufacturing Science and Engineering 124, no. 2 (2002): 420–25. http://dx.doi.org/10.1115/1.1455644.

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The conventional deep drawing process is limited to a certain Limit Drawing Ratio (LDR), beyond which localized wall thinning and rupture occur. One way to increase the LDR is to try to capture the onset of necking and to adjust process parameters in order to delay or avoid necking. This paper describes a method for monitoring the wall thickness of a cup during the deep drawing process. Measurement utilizes a noncontact ultrasound gauge that is located orthogonally to the drawn cup’s wall and is immersed in oil to create an acoustic coupling. Monitoring is based upon a deep drawing process mod

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Ma, Gao Shan, Han Ying Wang, Song Yang Zhang, and Min Wan. "Finite Element Analysis and Deep Drawing of Cylindrical Cups with 5A90 Al-Li Alloy Sheets." Applied Mechanics and Materials 66-68 (July 2011): 76–81. http://dx.doi.org/10.4028/www.scientific.net/amm.66-68.76.

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The cylindrical cup drawing of 5A90 Aluminum-Lithium alloy sheets at various forming conditions was studied by both the experimental approach and the finite element analysis. The uniaxial tensile tests and forming limit tests of 5A90 Al-Li alloy sheets at various temperatures were first carried out. The tests results were then employed in the finite element simulations to investigate the effects of process parameters, such as forming temperature, holder force, and die corner radius, on the formability of cylindrical cup drawing with 5A90 sheets. In order to validate the finite element analysis

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Book chapters on the topic "Limit Drawing Ratio (LDR)"

1

Vetr, Martin, Martin Schagerl, Kai-Uwe Schröder, and Christian Chimani. "On the Application of the Limit Drawing Ratio to Complex Geometries." In Design, Fabrication and Economy of Metal Structures. Springer Berlin Heidelberg, 2013. http://dx.doi.org/10.1007/978-3-642-36691-8_99.

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"Drawing Ratio, Limiting Drawing Ratio (LDR)." In Encyclopedia of Lubricants and Lubrication. Springer Berlin Heidelberg, 2014. http://dx.doi.org/10.1007/978-3-642-22647-2_200126.

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Conference papers on the topic "Limit Drawing Ratio (LDR)"

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Abou-Hanna, Jeries J., Timothy McGreevy, Abdalla Elbella, and Haithem Algousi. "Sensitivity Analysis of Hydro-Rim Deep Drawing of Cylindrical Cups." In ASME 2003 International Mechanical Engineering Congress and Exposition. ASMEDC, 2003. http://dx.doi.org/10.1115/imece2003-41120.

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Extensive nonlinear finite element analyses were conducted to help predict practical test conditions of intelligent hydro-rim deep forming of cylindrical cups under controlled cooled punch and heated blank temperatures, punch speed, chamber and rim pressures, and punch friction. The study focused on finding practical process conditions for maximizing the drawing ratio by variations in blank and punch temperatures, friction, rim pressure, chamber pressure, and punch speed. The study was based on an experimental cell that aimed at using real time control of the mentioned parameters to delay the

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Tsuji, Y., S. Yoshihara, S. Tsuda, Y. Iriyama, and Y. Nakano. "Effect of DLC Coating on Limiting Drawing Ratio of AZ31 Magnesium Alloy Sheet." In ASME 2009 International Mechanical Engineering Congress and Exposition. ASMEDC, 2009. http://dx.doi.org/10.1115/imece2009-10947.

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Magnesium alloys have several advantages that make them attractive for use in structural applications such as a superlight weight, high specific strength, ease of recycling and electromagnetic shielding capability. On the other hand, several disadvantages are associated with manufacturing using magnesium alloys such as the fact that it is practically impossible to apply conventional metal-forming techniques at room temperature without producing defects. Much effort, therefore, has recently been applied to improving the formability of magnesium-based alloys in order that they may realize their

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OKUDE, Yusuke. "Effects of forming conditions on limit of drawing ratio during cold drawing and ironing process of Ti-6Al-4V alloy sheets." In Metal Forming 2024. Materials Research Forum LLC, 2024. http://dx.doi.org/10.21741/9781644903254-15.

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Abstract. The low ductility of Ti–6Al–4V alloy at forming temperatures below 780°C is still a problem. Ti–6Al–4V is usually hot press formed at 780 to 900°C. A hot press formed Ti–6Al–4V alloy has been utilized in various devices such as medical and aerospace equipment. However, hot press forming increases cost, especially because it uses a furnace. To reduce cost, hot stamping by electric heating has been applied to titanium sheets or continuous resistance heating has been applied to the bar forming of Ti–6Al–4V alloy. Both electric heating and continuous resistance heating reduce the heating

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Tso, Pei-Lum, Hsin-Kai Liu, and Cheng-Ho Li. "Experimental Study of Drawing Process With Servo Press." In ASME 2007 International Mechanical Engineering Congress and Exposition. ASMEDC, 2007. http://dx.doi.org/10.1115/imece2007-41692.

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Servo presses providing flexible ram motions are extensively developed nowadays; the merit of such presses is the capability of generating versatile punch motions to fulfill the stamping. This paper studies a cup-shaped drawing process using a servo press. The aim of this research is to study the effect of the forming speed on preventing the cracks and wrinkles in drawing. A finite element method (FEM) software package—ABAQUS®, is utilized to predict the distribution of displacement stress, strain of the work material in drawing. Crack (related to thinning behavior) and wrinkle are two indices

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5

Shih, Hua-Chu, Ming F. Shi, Z. Cedric Xia, and Danielle Zeng. "Experimental Study on Shear Fracture of Advanced High Strength Steels: Part II." In ASME 2009 International Manufacturing Science and Engineering Conference. ASMEDC, 2009. http://dx.doi.org/10.1115/msec2009-84070.

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Developing a proper local formability failure criterion is the key to the successful prediction of the local formability of Advanced High Strength Steels (AHSS) in computer simulations. Shear fracture, which refers to the fracture occurred in the die radius when a sheet metal is drawn over a small die radius, often occurs earlier than predicted by the conventional forming limit curve (FLC). As shown in a previous study using a laboratory Stretch-Forming Simulator (SFS), shear fracture depends not only on the radius-to-thickness (R/T) ratio but also on the tension/stretch level applied to the s

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