Metal Şekillendirme Proseslerinde Sac Açınım Geometrisinin Sonlu Elemanlar Yöntemi ile Geliştirilmesi

Esener, Emre; Sönmez, E.; Fırat, Mehmet

doi:10.29109/http-gujsc-gazi-edu-tr.319383

Cited by 4 publications

(4 citation statements)

References 13 publications

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“…Measurements were carried out on 3 sections and 9 points in total (Fig. [12][13]. Upon the completion of simulations, after the part was formed as seen in Fig.…”

Section: Discussionmentioning

confidence: 99%

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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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“…Measurements were carried out on 3 sections and 9 points in total (Fig. [12][13]. Upon the completion of simulations, after the part was formed as seen in Fig.…”

Section: Discussionmentioning

confidence: 99%

“…Experimental design was made by selecting parameters of element formulation, number of integration points, blank holder force and friction coe cients. Simulations performed with the new parameters obtained, showed that springback reduced [12].…”

Section: Introductionmentioning

confidence: 92%

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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“…Cezalı Katı Eş Yönlü Malzeme (Solid Isotropic Material with Penalization, SIMP) [7] yöntemi günümüzde en yaygın olarak kullanılan yöntemlerden birisidir. Bu yöntemde daha önceden sonlu elemanlara ayrılmış olan parçanın elemanlar bazında ne kadar yoğunluğa sahip olması gerektiği literatürde sıklıkla kullanılan Sonlu Elemanlar Analizi (Finite Element Analysis, FEA) [8] sonucunda belirlenmektedir. Ceza katsayısının 1'den büyük olmasıyla birlikte düşük yoğunluğa sahip olan elemanlar birkaç yineleme sonrasında 0 yoğunluğuna sahip olmaktadır.…”

Section: İlgi̇li̇ Li̇teratür (Related Literature)unclassified

Topoloji Optimizasyonu Yapılmış Parçaların 3B Yazıcılar ile Doğrudan Üretilmesi

Yaman

2019

Gazi Üniversitesi Fen Bilimleri Dergisi Part C: Tasarım Ve Teknoloji

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ÖzBu çalışma çerçevesinde geliştirilen yöntem ile birlikte tasarım ve üretim akışına verilen mekanik parçaların topoloji optimizasyonu yapılmakta ve eklemeli imalat yöntemlerinden Eriyik Yığma Modellemeyi kullanan 3 boyutlu yazıcılarda doğrudan üretilebilmeleri için makine komutları üretilmektedir. Eklemeli imalat yöntemlerinin yaygınlaşmasıyla birlikte topoloji optimizasyonu yöntemlerinin uygulanabilirliği ortaya çıkmıştır. Çalışmada kullanılan Eriyik Yığma Modelleme yöntemi karışık geometriye sahip parçaların üretimi için ilk akla gelen yöntemlerden olmasa da destek malzemesi konusundaki gelişmelerle birlikte daha da sıklıkla kullanılacağı öngörülmektedir. Geliştirilen yöntemde öncelikli olarak verilen parçanın tanımlanan koşullara göre topoloji optimizasyonu yapılmakta ve sonrasında parçanın iç yapısı kabuklardan oluşacak şekilde üretim komutları oluşturulmaktadır. Bu işlemler Rhino3D bilgisayar destekli yazılımı ile birlikte çalışan ve algoritma geliştirme ortamı olan Grasshopper3D ile otomatik olarak gerçekleştirilmektedir. Yöntemin geçerliliğini ortaya koymak için farklı yaklaşımlarla üretilmiş olan yalın dayanaklı kirişler yük altında test edilmiştir. Sonuçlara göre önerilen yöntem ile üretilen kirişin ağırlık-mukavemet başarımı diğerlerine göre oldukça iyidir. AbstractWithin the scope of this study, machine codes are generated to fabricate topologically optimized parts directly, conveyed to the design and fabrication pipeline, utilizing 3 dimensional printers employing Fused Deposition Modeling type of additive manufacturing method. As the additive manufacturing industry advanced, topology optimization methods became applicable on the parts. Although Fused Deposition Modeling, which is used in this study, is not one of the popular methods for fabricating complicated parts, it will be utilized more frequently in the near future with the help of the advancements in support materials. In the proposed methods, the parts are first topologically optimized according to the defined conditions and then the machine codes are generated to have the interior of them constructed with shell like structures. These steps are done in an automated manner on Rhino3D (computer aided design software) and its algorithmic design tool Grasshopper3D. In order to prove the advantage of the proposed method, simply supported beams are manufactured via different approaches and tested under load. According to the results of the tests, the proposed approach has much better weight-strength performance.

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“…Die design and production stages have a significant impact on final product properties. For this reason, design and production stages need to be planned and followed with great attention [5,6].…”

Section: Introductionmentioning

confidence: 99%

Study on mechanical and microstructural properties of advanced high-strength welded sheet metal

Damlacik,

Baydi,

Küpeli

et al. 2023

tribomat

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Continuous research is carried out in the automotive industry to decrease the weight of automobile bodies without reducing durability. For this purpose, the use of welding sheet metal is one of the successful techniques. Welded sheets are formed by combining two or more flat materials with different thicknesses and different mechanical properties, using the welding method, before being shaped in order to provide superior properties. This situation requires more attention during the shaping stages. It is important to calculate the pressures to be applied to the welding areas and to apply the shaping steps in a way that will not reduce the material strength. For this reason, the production stages of the dies to be used in the manufacture of these parts are just as important. In this study, an innovative die design is carried out for the production of welded sheet metal. The microstructure and mechanical properties of the welded sheet formed by the die were examined. The effect of the forces applied to the welding areas on the material and the mechanical properties of the materials of different thicknesses were determined. Within the scope of the study, microstructure analysis, hardness and tensile tests were carried out and the results were examined. When the results obtained were examined, it was seen that the strength and hardness values of the samples obtained from the welded area were higher than the other areas.

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Metal Şekillendirme Proseslerinde Sac Açınım Geometrisinin Sonlu Elemanlar Yöntemi ile Geliştirilmesi

Cited by 4 publications

References 13 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

Topoloji Optimizasyonu Yapılmış Parçaların 3B Yazıcılar ile Doğrudan Üretilmesi

Study on mechanical and microstructural properties of advanced high-strength welded sheet metal

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