Experimental study and Numerical simulation of stress concentration in deep drawing process without blank holder
Deep drawing without blank holder is an important process for producing circular cups which used in many applications. In this process, the blank is subjected to various loads and stresses concentrations which can lead to cup failure. This research presents a theoretical and experimental study on th...
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| Format: | Article |
| Language: | Arabic |
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Assiut University, Faculty of Engineering
2025-07-01
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| Series: | JES: Journal of Engineering Sciences |
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| Online Access: | https://jesaun.journals.ekb.eg/article_428160_80d3b1acc4ce2691b343b007cf18aabb.pdf |
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| author | Ayman Abd-Eltwab almoataz Gomaa Eman Mohamed hammad Elmetwally |
| author_facet | Ayman Abd-Eltwab almoataz Gomaa Eman Mohamed hammad Elmetwally |
| author_sort | Ayman Abd-Eltwab |
| collection | DOAJ |
| description | Deep drawing without blank holder is an important process for producing circular cups which used in many applications. In this process, the blank is subjected to various loads and stresses concentrations which can lead to cup failure. This research presents a theoretical and experimental study on the effects of stresses concentrations in the deep drawing without blank holder. A simulation model was constructed the Dynamic Simulation Software - DEFORM software - to study the appropriate values for the variables. Practical experiments were conducted on universal testing machine configured for the process. Aluminum blanks were used as specimens with a thickness of 3 mm and various diameters. The process is carried out by placing the blank on the die and balancing it, then moving the punch downward to complete drawing process. During process, the specimen is subjected to loads pulling it downward. To avoid this, several suggestions were made to disperse the stresses and reduce the impact of stress concentration. The experiments were conducted at a speed of 9 mm per minute. For all experiments, the forming loads was measured during process. The results showed that avoiding stress concentration in the deep drawing process without blank holder had a significant effect in reducing the forming forces, minimizing the tearing of the samples, and improving the mechanical properties of the cups. The drawing ratio reached 2.46, which is a high percentage compared to the traditional condition, also there was a convergence between the theoretical, simulated, and experimental results |
| format | Article |
| id | doaj-art-e8127aeb87aa4fbebaea02bdce72262f |
| institution | Kabale University |
| issn | 1687-0530 2356-8550 |
| language | Arabic |
| publishDate | 2025-07-01 |
| publisher | Assiut University, Faculty of Engineering |
| record_format | Article |
| series | JES: Journal of Engineering Sciences |
| spelling | doaj-art-e8127aeb87aa4fbebaea02bdce72262f2025-08-20T03:24:21ZaraAssiut University, Faculty of EngineeringJES: Journal of Engineering Sciences1687-05302356-85502025-07-0153412513910.21608/jesaun.2025.355849.1413428160Experimental study and Numerical simulation of stress concentration in deep drawing process without blank holderAyman Abd-Eltwab0almoataz Gomaa1Eman Mohamed2hammad Elmetwally3Mechanical Engineering Dept., Faculty of Engineering, Beni-Suif university, Ben-Suef, Egypt.Mechanical Engineering Dept., Faculty of Engineering, South Valley University, Qena, EgyptMechanical Design and production , Facutly of Engineering ,Assuit University, Assiut, Egypt.Production Technology Dept., Faculty of Technology and Education, Beni-Suef University, beni-Suef, EgyptDeep drawing without blank holder is an important process for producing circular cups which used in many applications. In this process, the blank is subjected to various loads and stresses concentrations which can lead to cup failure. This research presents a theoretical and experimental study on the effects of stresses concentrations in the deep drawing without blank holder. A simulation model was constructed the Dynamic Simulation Software - DEFORM software - to study the appropriate values for the variables. Practical experiments were conducted on universal testing machine configured for the process. Aluminum blanks were used as specimens with a thickness of 3 mm and various diameters. The process is carried out by placing the blank on the die and balancing it, then moving the punch downward to complete drawing process. During process, the specimen is subjected to loads pulling it downward. To avoid this, several suggestions were made to disperse the stresses and reduce the impact of stress concentration. The experiments were conducted at a speed of 9 mm per minute. For all experiments, the forming loads was measured during process. The results showed that avoiding stress concentration in the deep drawing process without blank holder had a significant effect in reducing the forming forces, minimizing the tearing of the samples, and improving the mechanical properties of the cups. The drawing ratio reached 2.46, which is a high percentage compared to the traditional condition, also there was a convergence between the theoretical, simulated, and experimental resultshttps://jesaun.journals.ekb.eg/article_428160_80d3b1acc4ce2691b343b007cf18aabb.pdfdeep drawing processstresses concentrationsblank holderdrawing ratio and mode failure |
| spellingShingle | Ayman Abd-Eltwab almoataz Gomaa Eman Mohamed hammad Elmetwally Experimental study and Numerical simulation of stress concentration in deep drawing process without blank holder JES: Journal of Engineering Sciences deep drawing process stresses concentrations blank holder drawing ratio and mode failure |
| title | Experimental study and Numerical simulation of stress concentration in deep drawing process without blank holder |
| title_full | Experimental study and Numerical simulation of stress concentration in deep drawing process without blank holder |
| title_fullStr | Experimental study and Numerical simulation of stress concentration in deep drawing process without blank holder |
| title_full_unstemmed | Experimental study and Numerical simulation of stress concentration in deep drawing process without blank holder |
| title_short | Experimental study and Numerical simulation of stress concentration in deep drawing process without blank holder |
| title_sort | experimental study and numerical simulation of stress concentration in deep drawing process without blank holder |
| topic | deep drawing process stresses concentrations blank holder drawing ratio and mode failure |
| url | https://jesaun.journals.ekb.eg/article_428160_80d3b1acc4ce2691b343b007cf18aabb.pdf |
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