Study The Effect Of Curvature On Spring Back Of Double Curved Steel Sheet Using New Method

2007 ◽  
Author(s):  
M. H. Parsa ◽  
M. Kazemi ◽  
H. Pishbin
Keyword(s):  
Steel Sheet ◽  
New Method ◽  
Spring Back ◽  
Curved Steel

A New Method of Preparing Artificial Cores with Certain Cracks for Experiment Study of Elastic Wave Propagation

2011 ◽  
Vol 356-360 ◽  
pp. 2954-2957 ◽  
Author(s):  
Zi Zhen Wang ◽  
Ri He Wang ◽  
Yu Huan Bu ◽  
Xun Shan
Keyword(s):  
Wave Propagation ◽  
Aspect Ratio ◽  
Elastic Wave ◽  
Steel Sheet ◽  
Crack Opening ◽  
Elastic Wave Propagation ◽  
New Method ◽  
Thin Steel Sheet ◽  
Fractured Medium ◽  
Thin Steel

Crack universally existing underground is an important kind of pores. In order to study the elastic wave propagation in fractured medium through experiment, a new method to make artificial core with certain cracks using oil well cement and camphor sheet or thin steel sheet is put forward. Geometric parameters of the crack, such as shape, size and aspect ratio, are approximately equal to that of camphor sheet or thin steel sheet. Using the thin steel sheet to make crack can be more easy and accurate to control the crack angle than using camphor sheet. The crack opening scales at millimeters. The aspect ratio of cracks formed by camphor sheet ranges from 1.4 to 8, and aspect ratio of cracks formed by thin steel sheet ranges from 2.5 to 70. This method is proved simple and feasible by experiment practice, which can provide artificial cores with certain crack for acoustic wave propagation study.

The Effect of Anisotropy on Spring-Back of CK67 Steel Sheet in L-Dies Bending Processes

2011 ◽  
Vol 291-294 ◽  
pp. 672-675
Author(s):  
Jafar Bazrafshan ◽  
A. Gorji ◽  
A. Taghizadeh Armaky
Keyword(s):  
Numerical Simulations ◽  
Sheet Metal ◽  
Sheet Metal Forming ◽  
Metal Forming ◽  
Steel Sheet ◽  
Elastic Recovery ◽  
Sheet Thickness ◽  
Bend Angle ◽  
Spring Back ◽  
Geometric Changes

One of the most sensitive features of sheet metal forming processes is the elastic recovery during unloading, called spring-back, which leads to some geometric changes in the product. This phenomenon will affect bend angle and bend curvature, and can be influenced by various factors. In this research, the effects of sheet thickness and die radiuses an sheet anisotropy on spring-back in L-die bending of CK67 steel sheet were studied by experiments and numerical simulations.

Determination of spring-back of stainless steel sheet metal in “V” bending dies

2008 ◽  
Vol 29 (5) ◽  
pp. 1043-1050 ◽  
Author(s):  
Özgür Tekaslan ◽  
Nedim Gerger ◽  
Ulvi Şeker
Keyword(s):  
Stainless Steel ◽  
Sheet Metal ◽  
Steel Sheet ◽  
Stainless Steel Sheet ◽  
Spring Back

Investigation of Effective Parameters of Spring-Back in CK67 Steel Sheet Metal Using Finite Element Method

2013 ◽  
Vol 690-693 ◽  
pp. 2336-2343
Author(s):  
Samaneh Soleimani Darinsoo ◽  
Hamed Zoghi Shal ◽  
Ramin Khamedi
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Sheet Metal ◽  
Steel Sheet ◽  
Elastic Recovery ◽  
Element Model ◽  
Spring Back ◽  
Effective Parameters ◽  
Sheet Metal Parts ◽  
Element Method

Accurate prediction and controlling of spring-back within acceptable tolerance limits is absolutely essential for the design of bending die in order to produce sheet metal parts. This phenomenon which is defined as elastic recovery during unloading is one of the most important factors to influence the quality of sheet metal forming. This paper presents a study of spring-back in V-bending process of an isotropic CK67 steel sheet. In this investigation, in order to study the effects of significant parameters on spring-back, numerous simulations are performed using Finite Element Method (FEM). A two dimensional finite element model is developed using ABAQUS/Explicit intending to carry out a comprehensive study and prognosticate spring-back with variable parameters including punch load, punch tip radius (R p) and thickness. Numerical results obtained from the simulations are discussed in details in several diagrams. These results represent verifiable and practical data that are in line with the results of previous researchers.

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