DP600 ve HSLA300 Sac Malzemelerde Geri Esneme Davranışlarına Proses Parametrelerinin Etkisinin Deneysel Araştırılması

Aydin, Kadir; Karaağaç, İbrahim

doi:10.29130/dubited.532628

Cited by 4 publications

(3 citation statements)

References 3 publications

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“…It was seen that as ironing period increases, springback decreases. With the increase of the die angle, springback angle of both materials increased, then decreased [24].…”

Section: Introductionmentioning

confidence: 94%

Finite Element Analysis of Springback of High-Strength Metal SCGA1180DUB While U-Channeling, According to Wall Angle and Die Radius

Karabulut

Esen

2021

Preprint

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Springback is a problem as important as tearing or thinning, while forming high-strength sheets. Springback is an undesirable situation and it is the form difference between the desired form of a part in theory and the form obtained due to mechanical characteristics and process inputs of the material after die forming. It affects operations in shearing, punching or bending dies in subsequent operations in forming die sets. If the part is not within the desired tolerance range, it creates problems during assembly. In order for cost effective production plans for automotive parts to be made, suitable sheet forming simulations are needed. Waste of time and failures during die construction are minimized by defining accurate parameters by finite element analyses and minimizing periods of trial-and-error. In this study, the material SCGA1180DUB in sheet thickness of 0.8 mm from multi-phase steel sheet group was U-channeled, using Autoform sheet forming analysis program, according to appropriate process conditions having wall angles of 7°,10°,12° and die radius values of R3, R5, R8 and the springback values were estimated. The results obtained were compared through the finite element program and suitable wall angle and die radius values for the material SCGA1180DUB for forming advanced high-strength sheets were determined. As the die radii increased at the same wall angles, the amount of spring back increased significantly. In particular, due to high yield and tensile strength of multi-phase high strength sheet, springback values were observed to be high. Negative springbacks were observed in the roof of the part. In the same die radii, under the same process conditions, as wall angles increase, springback values decreased. In the literature, it is interesting that there are few studies regarding forming, springback of high-strength sheets SCGA1180DUB. This study will contribute to the literature. Autoform program was used for Finite Element Analysis.

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“…It was seen that as ironing period increases, springback decreases. With the increase of the die angle, springback angle of both materials increased, then decreased [24].…”

Section: Introductionmentioning

confidence: 94%

Finite Element Analysis of Springback of High-Strength Metal SCGA1180DUB While U-Channeling, According to Wall Angle and Die Radius

Karabulut

Esen

2021

Preprint

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“…Kalıp açısının artmasıyla her iki malzemede geri esneme miktarı önce artmış, daha sonra azalmıştır. DP600 sacında HSLA300' e göre daha fazla geri yaylanma meydana geldiği görülmüştür [13]. Ayrıca sacların V büküm prosesi sonundaki deformasyon ve kırılma davranışları bilinmelidir [14].…”

Section: Introductionunclassified

Experimental investigation of the effect of process parameters on springback behavior of SCGADUB1180 high strength sheet

KARABULUT¹,

Esen²

2023

Pamukkale J Eng Sci

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Dayanımı yüksek ve hafif yüksek mukavemetli çelikler, otomotiv sektöründe yaygın olarak kullanılmaktadır. Yüksek mukavemetli sacların şekillendirilmesinde geri yaylanma, yırtılma ve incelme kadar önemli bir problemdir. Bu çalışmada, SCGADUB1180 yüksek mukavemetli sacının çekme testleri yapılarak mekanik özellikleri tanımlanmış ve V büküm prosesinde, zımba hızı, kalıp açısı, ütüleme süresi, hadde yönü parametrelerinin geri yaylanmaya etkisi deneysel olarak araştırılmıştır. Literatürde, SCGADUB1180 yüksek mukavemetli sacının şekillendirilmesi ve geri yaylanma davranışları üzerine araştırmaya rastlanmamıştır. Yapılan deney sonuçları sonucunda, zımba hızı arttıkça 60°,90° ve 120° büküm açılarında geri yaylanma değerleri artmıştır. 60° büküm açısında zımba hızı 3 mm/sn'den 10 mm/sn arttığında geri yaylanma, 0° hadde yönünde %1.87, 45° hadde yönünde %0.35, 90° hadde yönünde %9.78 artmıştır. 90° büküm açısında zımba hızı 3 mm/sn'den 10 mm/sn arttığında geri yaylanma, 0° hadde yönünde %5.87, 45° hadde yönünde %0.55, 90° hadde yönünde %4.77 artmıştır. 120° büküm açısında zımba hızı 3 mm/sn'den 10 mm/sn arttığında geri yaylanma, 0° hadde yönünde %27, 45° hadde yönünde %0.49, 90° hadde yönünde %3.5 artmıştır. 3 mm/sn zımba hızında geri yaylanma değerleri en düşüktür. Ütüleme süresi 0.2 sn'den 1 sn'ye arttırıldığında geri yaylanma değeri % 5.56 azalmıştır. 0° hadde yönünde en az geri yaylanmalar görülmüştür. Kalıp açısının artmasıyla geri yaylanma miktarları artmıştır. Elde edilen deneysel sonuçlar, yüksek mukavemetli sacların geri yaylanma davranışlarının tahmin edilip, bükme prosesinde mekanik davranışlarının anlaşılmasına fayda sağlayacaktır.High strength and light high strength steels are widely used in the automotive industry. Springback is as important a problem as tearing and thinning in the shaping of high-strength sheets. In this study, the mechanical properties of SCGADUB1180 high-strength sheet were determined by performing tensile tests and the effects of punch speed, die angle, holding time, rolling direction parameters on springback were experimentally investigated in the V bending process. No research has been found in the literature on the shaping and springback behavior of SCGADUB1180 high strength sheet. As a result of the test results, as the punch speed increased, the springback values increased at 60°, 90° and 120° bending angles. When punch speed increased from 3 mm/sec to 10 mm/sec at 60° bend angle, springback increased 1.87% in 0° rolling direction, 0.35% in 45° rolling direction and 9.78% in 90° rolling direction. When punch speed increased from 3 mm/sec to 10 mm/sec at 90° bend angle, springback increased 5.87% in 0° rolling direction, 0.55% in 45° rolling direction and 4.77% in 90° rolling direction. When punch speed increased from 3 mm/sec to 10 mm/sec at 120° bend angle, springback increased 27% in 0° rolling direction, 0.49% in 45° rolling direction, and 3.5% in 90° rolling direction. Springback values are lowest at 3 mm/sec punch speed. When the holding time was increased from 0.2 s to 1 s, th...

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“…Sheet metal materials are most widely used material type in almost all industrial fields, from automotive to aeronautics, from food to agriculture (Aydın and Karaağaç 2019). These materials are exposed to external factors that negatively affect their lifetime, depending on the environment and conditions in which they are used.…”

Section: Introductionmentioning

confidence: 99%

Comparison of experimental and numerical analysis of Quasi-Static punch shear test for stainless steel sheet material

Şahbaz

2022

Turkish Journal of Engineering

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In this study, Quasi-Static Punch Shear Test (QS-PST) for AISI-304 stainless steel sheet material with 0.5 mm thickness was performed experimentally and numerically, then the results were compared. QS-PST was designed non-standard according to the need and is especially used to determine the puncture resistance of composite plate materials against lowspeed loading. Since the results obtained from QS-PST are similar to those from ballistic tests, this has attracted the attention of researchers. The experimental study was carried out by integrating the die and punch which were specially produced for this test, into an electromechanical tensile-compression test device with a capacity of 100 kN. In order to define the material properties correctly in numerical analysis, the tensile tests of the relevant material were also carried out with the same device. Then, the CAD model of the experimental system was generated and Finite Element Analysis (FEA) was performed. In FEA, the mesh structure was determined as tetrahedral, since it gave closer results in such tests and the analyzes were performed by increasing the number of mesh from 16700 to 151800 elements. Finally, the experimentally and numerically obtained results were compared and it was observed that the result were very close depending on increasing the number of mesh.

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DP600 ve HSLA300 Sac Malzemelerde Geri Esneme Davranışlarına Proses Parametrelerinin Etkisinin Deneysel Araştırılması

Cited by 4 publications

References 3 publications

Finite Element Analysis of Springback of High-Strength Metal SCGA1180DUB While U-Channeling, According to Wall Angle and Die Radius

Finite Element Analysis of Springback of High-Strength Metal SCGA1180DUB While U-Channeling, According to Wall Angle and Die Radius

Experimental investigation of the effect of process parameters on springback behavior of SCGADUB1180 high strength sheet

Comparison of experimental and numerical analysis of Quasi-Static punch shear test for stainless steel sheet material

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