Kavi, Halit
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Kavi, H.
Kavi, H
Kavi, H
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03.10. Department of Mechanical Engineering
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Former Staff
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1NO POVERTY
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2ZERO HUNGER
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4QUALITY EDUCATION
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5GENDER EQUALITY
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8DECENT WORK AND ECONOMIC GROWTH
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9INDUSTRY, INNOVATION AND INFRASTRUCTURE
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250
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7
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6812/4861
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1
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WoS Citation Count
231
Scopus Citation Count
250
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1
WoS Citations per Publication
33.00
Scopus Citations per Publication
35.71
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7
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1
| Journal | Count |
|---|---|
| 10. Denizli Malzeme Sempozyumu ve Sergisi | 2 |
| 13th International Conference on Experimental Mechanics | 1 |
| Journal of Materials Science | 1 |
| Materials and Design | 1 |
| Thin-Walled Structures | 1 |
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Conference Object Alüminyum Kapalı Hücreli Köpüklerin Toz Metalürjisi Yönetimi ile Üretilmesi(Pamukkale Üniversitesi, 2004) Güden, Mustafa; Kavi, Halit; Toksoy, Ahmet KaanSon şekle yakın Alüminyum kapalı hücreli yapılar, örneğin otomobil tampon ve kapıları, tabletlerin köpükleştirilmesi metodu olarak bilinen toz metalürjisi yöntemi ile hazırlanmaktadır. Metot tozların karıştırılması, sıcak preslenmesi ve elde edilen toz tabletlerin kullanılan alaşımın ergime sıcaklığının üstüne ısıtılması suretiyle köpükleştirilmesi süreçlerinden oluşmaktadır. Bu çalışmada, toz metalürjisi metodu ile kapalı hücreli alüminyum köpük metal üretim parametreleri ve üretim sonucu ortaya çıkan mikroyapılar, köpüğün yoğunluğuna bağlı mekanik özellikleri ile birlikte özetlenmektedir. Son olarak, alüminyum köpük metalin yuvarlak tüplerde dolgu malzemesi olarak kullanımına yönelik deneysel çalışmaların sonuçları otomobil ezilme kutularında kullanımına yönelik örnek olarak verilmiştir.Conference Object Quasi-Static Axial Crushing Behavior of Aluminum Closed Cell Foam-Filled Multi-Packed Aluminum and Composite/Aluminum Hybrid Tubes(The European Association for Experimental Mechanics, 2007) Güden, Mustafa; Kavi, Halit; Yüksel, Sinan; Taşdemirci, AlperThe axial crushing behavior of empty and Al close-cell foam-filled Al multi-tube designs (hexagonal and square) and E-glass woven fabric polyester composite and Al hybrid tubes were investigated through quasi-static compression testing. The effects of foam filling on the deformation mode and the crushing and average crushing loads of single tubes and multi-tube designs were determined. Although foam filling increased the energy absorption in single Al tube and multi-tube designs, it was not effective in increasing the specific absorbed energy over that of the empty Al tube. However, multi-tube designs were found to be energetically more effective than single tubes at similar foam filler densities, proving a higher interaction effect in multi-tube designs. Empty composite and empty hybrid tubes crushed predominantly in progressive crushing mode, without applying any triggering mechanism. Foam filling was found to be ineffective in increasing the crushing loads of the composite tubes over the sum of the crushing loads of empty composite tube and foam. However, foam filling stabilized the composite progressive crushing mode. In empty hybrid tubes, the deformation mode of the inner Al tube was found to be a more complex form of the diamond mode of deformation of empty Al tube, leading to higher crushing load values than the sum of the crushing load values of empty composite tube and empty metal tube.Article Citation - WoS: 59Citation - Scopus: 68Quasi-Static Axial Compression Behavior of Constraint Hexagonal and Square-Packed Empty and Aluminum Foam-Filled Aluminum Multi-Tubes(Elsevier Ltd., 2006) Güden, Mustafa; Kavi, HalitThe axial crushing behavior of empty and Al close-cell foam-filled single Al tubes and Al multi-tube designs (hexagonal and square) were investigated through quasi-static compression testing. The effects of foam filling on the deformation mode and the crushing and average crushing loads of single tubes and multi-tube designs were determined. The foam filling was found to shift the deformation mode of empty single tube and empty multi-tube designs from diamond into concertina. In multi-tube designs the constraint effects and the frictional forces were found to increase the average crushing loads over those of single tubes. It was also found that foam filling induced a higher strengthening coefficient in multi-tube than single tubes. Although foam filling increased the energy absorption in single tubes and multi-tube designs, it was not effective in increasing the specific absorbed energy over that of the empty tubes. However, multi-tube designs were found to be energetically more effective than single tubes at similar foam-filler densities, proving a higher interaction effect in multi-tube designs.Article Citation - WoS: 19Citation - Scopus: 19Experimental Investigation of Interaction Effects in Foam-Filled Thin-Walled Aluminum Tubes(Springer Verlag, 2006) Güden, Mustafa; Toksoy, Ahmet Kaan; Kavi, HalitThe interaction coefficients of polystyrene foam filling of thin-walled aluminum cylindrical tubes were investigated experimentally through compression testing of partially foam-filled tubes with and without adhesive. The experimental load-displacement curves and observation of the crushed sections of filled tubes have shown that partial foam filling reduced the fold length and hence increased the average crushing loads of tubes, proving the interaction effect between tube wall and filler. The interaction coefficients for the partial foam filling were further calculated to be in the level and/or higher than that of the foam plateau load of transverse direction.Conference Object Alüminyum Köpük Dolu Alüminyum Tüplerin Ezilme Davranışları(Pamukkale Üniversitesi, 2004) Kavi, Halit; Yüksel, Sinan; Tanoğlu, Metin; Güden, MustafaSon yıllarda hafif alüminyum köpük dolu tüplerin çarpışma enerjisi sönümleme amaçlı kullanımı için artan bir ilgi vardır. Tekli veya iç içe geçmiş köpük dolu tüpler bu amaç doğrultusundaki bu uygulamalar için çalışılmasına rağmen altıgen ve kübik paketleme geometrileri henüz araştırılmamıştır. Bu çalışmanın nihai amacı tekli köpük dolu tüplerin enerji emme kapasitesini artıracak çoklu tüp geometrilerini belirlemektir. Dolgu malzemesi olarak kullanılan alüminyum köpük malzemeler toz metalürjisi yöntemi ile hazırlanmıştır. Köpük numuneler blok köpük malzemeden kesilerek hazırlanmıştır. Alüminyum köpük dolu tekli tüpler üzerinde basma testleri yapılmış ve sonuçlar ortalama ezilme kuvveti cinsinden değerlendirilmiştir.Article Citation - WoS: 153Citation - Scopus: 163Predicting Energy Absorption in a Foam-Filled Thin-Walled Aluminum Tube Based on Experimentally Determined Strengthening Coefficient(Elsevier Ltd., 2006) Kavi, Halit; Toksoy, Ahmet Kaan; Güden, MustafaThe energy absorption in a foam-filled thin-walled circular Al tube was investigated based on the experimentally determined strengthening coefficient of filling using Al and polystyrene closed-cell foams with three different densities. Foam filling was found to change the deformation mode of tube from diamond (empty tube) into concertina, regardless the foam type and density used. Although foam filling resulted in higher energy absorption than the sum of the energy absorptions of the tube alone and foam alone, it was not effective in increasing the specific energy than simply thickening the tube wall. It was shown that for efficient foam filling an appropriate foam-tube combination must be selected by taking into account the magnitude of strengthening coefficient of foam filling and the foam filler plateau load.Master Thesis Investigation of Compression Mechanical Behaviour of Aluminum Foam Filled Metal Tubes(Izmir Institute of Technology, 2004) Kavi, Halit; Güden, MustafaNovel crash element designs, composing of packing of foam-filled multi tubes, were investigated through compression testing at quasi-static deformation rates. Multi-tube designs involved the hexagonal and cubic packing of Al foam-filled deep drawn Al tubes inside rigid cylindrical and rectangular dies. For comparison purposes, empty Al tubes, Al and polystyrene foam-filled single tubes, Al and polystyrene foam-filled bitubular tubes and empty multi-tube designs of hexagonal and cubic packing were also tested under the similar test conditions. The Al-closed cell foams used for the filling of tubes were prepared in house using a patented foaming process. For each tube geometry investigated the average crushing load and specific energy absorption was calculated and the results were compared.It was shown that although foam filling resulted in higher energy absorption than the sum of the energy absorptions of the tube alone and foam alone, it was not more effective in increasing the specific energy than simply thickening the tube walls. The lower specific energy absorptions of the Al-foam filled single tubes based on the equal mass criterion were due to the relatively lower plateau stresses of the filler material used. The experimental results have further shown that both multi-tube and bitubular geometries exhibited higher specific energy absorption capabilities than those of foam-filled single tubes. The increased strengthening coefficients of the multi-tube geometries with foam filling were solely due to the frictional loads between the adjacent tube walls, tube walls and die wall and constraint effect of die itself. The frictional loads were also found to increase the specific energy absorption of empty multi-tube geometries. The effect of Al foam density was found to increase the specific energy absorption in multi-tube geometries.