Remarks On Deformation In Snow With Residual Stress And Gravitational Force By Detonation Impact
Estimation of strain (deformation) and strain energy at the time of an explosion has been undertaken in the present investigation. A basic concept of explosive pressure which is required for the estimation of strain and strain energy has been drawn from the underwater explosion with suitable modific...
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| Format: | Article |
| Language: | English |
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IIUM Press, International Islamic University Malaysia
2012-01-01
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| Series: | International Islamic University Malaysia Engineering Journal |
| Online Access: | http://journals.iium.edu.my/ejournal/index.php/iiumej/article/view/205 |
| _version_ | 1819031435867062272 |
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| author | Siavosh Ahmadi |
| author_facet | Siavosh Ahmadi |
| author_sort | Siavosh Ahmadi |
| collection | DOAJ |
| description | Estimation of strain (deformation) and strain energy at the time of an explosion has been undertaken in the present investigation. A basic concept of explosive pressure which is required for the estimation of strain and strain energy has been drawn from the underwater explosion with suitable modification to the present studies. One of the most significant aspects of the present investigation is to augment the model by accounting it for gravitational force and residual stresses which are of realistic in nature. Studies consist of computational aspect by observing the variation of strain and strain energy with respect to material parameters such as Elastic modulus (E), poisons ratio (?), density (?), and flow parameters such as peak pressure (Pm), sound velocity (Vs), and length of snow slab (L). One of the interesting observation found in the computational aspect is, the deformation is found to decrease as the velocity of sound (Vs) in snow increases which appears to be strange but found factual. The model has been compared with the other existing papers in the literature and found that, the present model yields to better results.
ABSTRAK: Anggaran regangan (canggaan) dan tenaga regangan pada masa letupan diambil kira dalam kajian ini. Konsep asas tekanan letupan yang diperlukan untuk anggaran regangan dan tenaga regangan diperolehi daripada letupan bawah air dengan pengubahsuaian yang sesuai dalam kajian terkini. Antara aspek penting dalam kajian ini adalah penambahan model dengan mengambil kira daya graviti dan tegasan sisa yang sebenar. Kajian terdiri daripada aspek pengiraan, dengan memerhatikan variasi regangan dan tenaga regangan terhadap parameter bahan seperti modulus anjal (E), nisbah Poisson’s (?), ketumpatan (?), dan parameter aliran seperti tekanan puncak (Pm), halaju bunyi (Vs), dan panjang papak salji (L). Antara pemerhatian menarik yang ditemui dalam aspek pengiraan ialah, canggaan didapati berkurangan ketika halaju bunyi (Vs) salji bertambah. Walaupun ini nampak asing, tetapi ianya terbukti benar. Model dibandingkan dengan kertas kerja lain dan didapati bahawa, model terkini memberikan keputusan yang lebih tepat.
KEYWORDS: avalanche dynamics; fracture mechanics; detonation pressure |
| first_indexed | 2024-12-21T06:46:01Z |
| format | Article |
| id | doaj.art-32f3968dafc1413b81fe853fe1b7fecb |
| institution | Directory Open Access Journal |
| issn | 1511-788X 2289-7860 |
| language | English |
| last_indexed | 2024-12-21T06:46:01Z |
| publishDate | 2012-01-01 |
| publisher | IIUM Press, International Islamic University Malaysia |
| record_format | Article |
| series | International Islamic University Malaysia Engineering Journal |
| spelling | doaj.art-32f3968dafc1413b81fe853fe1b7fecb2022-12-21T19:12:36ZengIIUM Press, International Islamic University MalaysiaInternational Islamic University Malaysia Engineering Journal1511-788X2289-78602012-01-0112510.31436/iiumej.v12i5.205Remarks On Deformation In Snow With Residual Stress And Gravitational Force By Detonation ImpactSiavosh Ahmadi0Department of mathematics Tehran north branch, Islamic Azad University Tehran, IranEstimation of strain (deformation) and strain energy at the time of an explosion has been undertaken in the present investigation. A basic concept of explosive pressure which is required for the estimation of strain and strain energy has been drawn from the underwater explosion with suitable modification to the present studies. One of the most significant aspects of the present investigation is to augment the model by accounting it for gravitational force and residual stresses which are of realistic in nature. Studies consist of computational aspect by observing the variation of strain and strain energy with respect to material parameters such as Elastic modulus (E), poisons ratio (?), density (?), and flow parameters such as peak pressure (Pm), sound velocity (Vs), and length of snow slab (L). One of the interesting observation found in the computational aspect is, the deformation is found to decrease as the velocity of sound (Vs) in snow increases which appears to be strange but found factual. The model has been compared with the other existing papers in the literature and found that, the present model yields to better results. ABSTRAK: Anggaran regangan (canggaan) dan tenaga regangan pada masa letupan diambil kira dalam kajian ini. Konsep asas tekanan letupan yang diperlukan untuk anggaran regangan dan tenaga regangan diperolehi daripada letupan bawah air dengan pengubahsuaian yang sesuai dalam kajian terkini. Antara aspek penting dalam kajian ini adalah penambahan model dengan mengambil kira daya graviti dan tegasan sisa yang sebenar. Kajian terdiri daripada aspek pengiraan, dengan memerhatikan variasi regangan dan tenaga regangan terhadap parameter bahan seperti modulus anjal (E), nisbah Poisson’s (?), ketumpatan (?), dan parameter aliran seperti tekanan puncak (Pm), halaju bunyi (Vs), dan panjang papak salji (L). Antara pemerhatian menarik yang ditemui dalam aspek pengiraan ialah, canggaan didapati berkurangan ketika halaju bunyi (Vs) salji bertambah. Walaupun ini nampak asing, tetapi ianya terbukti benar. Model dibandingkan dengan kertas kerja lain dan didapati bahawa, model terkini memberikan keputusan yang lebih tepat. KEYWORDS: avalanche dynamics; fracture mechanics; detonation pressurehttp://journals.iium.edu.my/ejournal/index.php/iiumej/article/view/205 |
| spellingShingle | Siavosh Ahmadi Remarks On Deformation In Snow With Residual Stress And Gravitational Force By Detonation Impact International Islamic University Malaysia Engineering Journal |
| title | Remarks On Deformation In Snow With Residual Stress And Gravitational Force By Detonation Impact |
| title_full | Remarks On Deformation In Snow With Residual Stress And Gravitational Force By Detonation Impact |
| title_fullStr | Remarks On Deformation In Snow With Residual Stress And Gravitational Force By Detonation Impact |
| title_full_unstemmed | Remarks On Deformation In Snow With Residual Stress And Gravitational Force By Detonation Impact |
| title_short | Remarks On Deformation In Snow With Residual Stress And Gravitational Force By Detonation Impact |
| title_sort | remarks on deformation in snow with residual stress and gravitational force by detonation impact |
| url | http://journals.iium.edu.my/ejournal/index.php/iiumej/article/view/205 |
| work_keys_str_mv | AT siavoshahmadi remarksondeformationinsnowwithresidualstressandgravitationalforcebydetonationimpact |