Evaluation of thinning behaviour under the influence of plastic hardening and surface friction during small punch test
Understanding the deformation response of the material involving thinning under small punch loading is vital to ensure structural integrity. This paper systematically investigates the effects of plastic hardening on the thinning process under different levels of surface friction between the punch,...
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| Format: | Article |
| Language: | English |
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Gruppo Italiano Frattura
2025-01-01
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| Series: | Fracture and Structural Integrity |
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| Online Access: | https://fracturae.com/index.php/fis/article/view/5236 |
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| author | Sarthok Chandra Pandit Nasrul Azuan Alang Imam Ul Ferdous Juliawati Binti Alias Mohd Firdaus Bin Hassan Asnul Hadi Bin Ahmad |
| author_facet | Sarthok Chandra Pandit Nasrul Azuan Alang Imam Ul Ferdous Juliawati Binti Alias Mohd Firdaus Bin Hassan Asnul Hadi Bin Ahmad |
| author_sort | Sarthok Chandra Pandit |
| collection | DOAJ |
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Understanding the deformation response of the material involving thinning under small punch loading is vital to ensure structural integrity. This paper systematically investigates the effects of plastic hardening on the thinning process under different levels of surface friction between the punch, die and specimen. The small punch test conditions are modeled using Finite Element (FE) software of Abaqus. An axisymmetric model with a bi-linear constitutive material model incorporating different plastic hardening slopes is employed. Furthermore, the Coulomb’s friction coefficient between the disc-shaped specimen and the punch as well as the die varies between 0 (frictionless) to 0.7. The study found that the effect of plastic hardening on thinning process is negligible. On the other hand, the effect of thinning at the center of the specimen is significant under frictionless surface conditions. Thinning is observed to be dominant during the membrane stretching and plastic instability deformation stages. As the surface friction increases, the resistance to sliding deformation decreases. As a result, tensile instability is predicted at the location offset from the center of the specimen. Future efforts to model material behaviour and determine mechanical properties using small punch load conditions must consider the effects of friction.
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| format | Article |
| id | doaj-art-1ebf92f088034d16b2418d3587507f5c |
| institution | Kabale University |
| issn | 1971-8993 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | Gruppo Italiano Frattura |
| record_format | Article |
| series | Fracture and Structural Integrity |
| spelling | doaj-art-1ebf92f088034d16b2418d3587507f5c2025-01-31T06:10:08ZengGruppo Italiano FratturaFracture and Structural Integrity1971-89932025-01-01197210.3221/IGF-ESIS.72.05Evaluation of thinning behaviour under the influence of plastic hardening and surface friction during small punch testSarthok Chandra Pandit0https://orcid.org/0009-0009-2660-2564Nasrul Azuan Alang1https://orcid.org/0000-0003-3293-5524Imam Ul Ferdous2https://orcid.org/0000-0002-9158-216XJuliawati Binti Alias3Mohd Firdaus Bin Hassan4Asnul Hadi Bin Ahmad5Faculty of Mechanical and Automotive Engineering Technology, Universiti Malaysia Pahang Al-Sultan Abdullah, 26600, Pekan Pahang, MalaysiaFaculty of Mechanical and Automotive Engineering Technology, Universiti Malaysia Pahang Al-Sultan Abdullah, 26600, Pekan Pahang, MalaysiaFaculty of Mechanical and Automotive Engineering Technology, Universiti Malaysia Pahang Al-Sultan Abdullah, 26600, Pekan Pahang, MalaysiaFaculty of Mechanical and Automotive Engineering Technology, Universiti Malaysia Pahang Al-Sultan Abdullah, 26600, Pekan Pahang, MalaysiaFaculty of Mechanical and Automotive Engineering Technology, Universiti Malaysia Pahang Al-Sultan Abdullah, 26600, Pekan Pahang, MalaysiaFaculty of Mechanical and Automotive Engineering Technology, Universiti Malaysia Pahang Al-Sultan Abdullah, 26600, Pekan Pahang, Malaysia Understanding the deformation response of the material involving thinning under small punch loading is vital to ensure structural integrity. This paper systematically investigates the effects of plastic hardening on the thinning process under different levels of surface friction between the punch, die and specimen. The small punch test conditions are modeled using Finite Element (FE) software of Abaqus. An axisymmetric model with a bi-linear constitutive material model incorporating different plastic hardening slopes is employed. Furthermore, the Coulomb’s friction coefficient between the disc-shaped specimen and the punch as well as the die varies between 0 (frictionless) to 0.7. The study found that the effect of plastic hardening on thinning process is negligible. On the other hand, the effect of thinning at the center of the specimen is significant under frictionless surface conditions. Thinning is observed to be dominant during the membrane stretching and plastic instability deformation stages. As the surface friction increases, the resistance to sliding deformation decreases. As a result, tensile instability is predicted at the location offset from the center of the specimen. Future efforts to model material behaviour and determine mechanical properties using small punch load conditions must consider the effects of friction. https://fracturae.com/index.php/fis/article/view/5236DeformationFrictionHardeningSmall PunchThinning |
| spellingShingle | Sarthok Chandra Pandit Nasrul Azuan Alang Imam Ul Ferdous Juliawati Binti Alias Mohd Firdaus Bin Hassan Asnul Hadi Bin Ahmad Evaluation of thinning behaviour under the influence of plastic hardening and surface friction during small punch test Fracture and Structural Integrity Deformation Friction Hardening Small Punch Thinning |
| title | Evaluation of thinning behaviour under the influence of plastic hardening and surface friction during small punch test |
| title_full | Evaluation of thinning behaviour under the influence of plastic hardening and surface friction during small punch test |
| title_fullStr | Evaluation of thinning behaviour under the influence of plastic hardening and surface friction during small punch test |
| title_full_unstemmed | Evaluation of thinning behaviour under the influence of plastic hardening and surface friction during small punch test |
| title_short | Evaluation of thinning behaviour under the influence of plastic hardening and surface friction during small punch test |
| title_sort | evaluation of thinning behaviour under the influence of plastic hardening and surface friction during small punch test |
| topic | Deformation Friction Hardening Small Punch Thinning |
| url | https://fracturae.com/index.php/fis/article/view/5236 |
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