Determination of buckling limit of strain in cold roll forming by the finite element analysis

Farzin, Mahmoud; Tehrani, Mehran; Shameli, E.

doi:10.1016/s0924-0136(02)00357-6

Cited by 47 publications

(23 citation statements)

References 3 publications

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“…The main objective of this study is to develop of a flexible roll forming and bending process for an irregular sheet to achieve a constant bending width [5]. In this study, we investigated the mechanical behavior during the flexible roll forming process.…”

Section: Objectives and Approachmentioning

confidence: 99%

Simulation Design of Continuous Flexible Roll Forming Bending Process

Ya¹,

Jung²

2017

dtetr

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Abstract. Simulation is a very helpful and it becomes a useful tool in the field of roll forming. Simulation provides a low cost, secure and fast analysis tool. The process and roll design for flexible roll forming of a sheet with varying cross-section was investigated. In order to obtain a constant bending width, rotational speeds, locations, orientations and dimensions of the rolls were calculated following the unfolding prediction of the sheet metal. The simulation is elaborated by using ABAQUS software working together with elastic-plastic modules which we developed taking into account of interactions between these fields. The application of this method makes it possible to highlight the strain-stress and mechanical behavior laws and procedures the spring-back. Thus, the flexible roll forming bending process with different shape can be eliminated by the simulation software and make a clear guide for the actual machine to work.

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Section: Objectives and Approachmentioning

confidence: 99%

Simulation Design of Continuous Flexible Roll Forming Bending Process

Ya¹,

Jung²

2017

dtetr

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“…Several papers have been written about the finite element simulation on cold roll forming for example [5][6][7]. …”

Section: Approachmentioning

confidence: 99%

Cold roll forming of a U-channel made of high strength steel

Lindgren

2007

Journal of Materials Processing Technology

105

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Cold roll forming is a bending process where the bending occurs gradually in several forming steps from an undeformed strip to a finished profile. The process is very interesting for the sheet metal industry due to the high speed in which the profile can be produced. High strength steel has, in recent years, become more common in cold roll forming. These materials have advantages but also disadvantages that affect the design of the process.Simple models in literature [K.F. Chiang, Cold roll forming, ME Thesis, University of Auckland, August 1984] predict that the longitudinal peak membrane strain in the flange of a profile is independent of the material properties. However, Ingvarsson [L. Ingvarsson, Förenklad teori för rullforming av elementär v-profil, jämförelse mellan normalt och höghållfast stål, VAMP 15-rullforming 23 april 2001] compared mild and ultra high strength in a roll forming experiment and the conclusion was that the material properties will affect the finished profile. This paper is a fundamental study performed in order to understand the observation by Ingvarsson [L. Ingvarsson, Förenklad teori för rullforming av elementär v-profil, jämförelse mellan normalt och höghållfast stål, VAMP 15-rullforming 23 april 2001].The objectives of this study are to investigate the change in the longitudinal peak membrane strain at the flange edge and the deformation length when the yield strength increases. These are important since they can be used to determine the number of forming steps and the distance between them when designing the cold roll forming machine. The result from the simulations show that the longitudinal peak membrane strain decreases and the deformation length increases when the yield strength is increased.

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“…The elastic deformation behavior of 3D variable cross-section roll forming is to study the plasticity deformation stage of the plate which goes through the stretching deformation before yield, and the deformation of the plate after unloading, that is the elastic deformation of the material.3D variable cross-section roll forming is a method of adopting multi stands progressive forming [1][2][3][4] . Such as the process of six stands, in the forming process of metal sheet, the variable cross-section zone passes through a single stand and the elastic-plastic deformation occurs.…”

Section: Introductionmentioning

confidence: 99%

Research on Repeated Loading and Unloading Deformation Behavior of High-strength Steel

Guan¹,

Dong²,

Feng³

2018

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Abstract. 3D variable cross-section roll forming is a forming method that adopts multi stands gradually roll forming.In the process of plate material forming,deformed region goes through once stand,one phenomenon of elastic-plastic deformation occurs.Through multiple stands,the phenomenon of repeated loading and unloading occurs on plate material.In this paper, the elastic deformation behavior of TRIP590(transformation induced palsticitu steel) after multi elastic-plastic deformation was obtained, and the elastic strain and elasticity modulus of TRIP590 was also obtained by taking one directional tensile test.The above results provide experimental data for the calculation of bending rebound of 3D variable corss-section roll forming.

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Determination of buckling limit of strain in cold roll forming by the finite element analysis

Cited by 47 publications

References 3 publications

Simulation Design of Continuous Flexible Roll Forming Bending Process

Simulation Design of Continuous Flexible Roll Forming Bending Process

Cold roll forming of a U-channel made of high strength steel

Research on Repeated Loading and Unloading Deformation Behavior of High-strength Steel

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