İsmail Saraç | Aksaray University (original) (raw)
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Papers by İsmail Saraç
Adıyaman Üniversitesi Mühendislik Bilimleri Dergisi
Yapıştırma bağlantılarının mekanik özelliklerinin belirlenmesinde kullanılan sayısal yöntemler za... more Yapıştırma bağlantılarının mekanik özelliklerinin belirlenmesinde kullanılan sayısal yöntemler zaman içerisinde gelişim göstermiştir. Başlangıçta maksimum gerilme/gerinim yöntemi kullanılarak analizler yapıldı. Bunu takiben, yapıştırma bağlantılarında oluşan hasarın bir çeşit kırılma problemi olması nedeniyle kırılma mekaniği yaklaşımları kullanılmaya başlandı. İlk olarak Lineer Elastik Kırılma Mekaniği temelli çalışmalar yoğun bir şekilde yapıldı. Lineer Elastik Kırılma Mekaniği yaklaşımıyla önemli oranda başarılı çalışmalar yapılmasına rağmen, çatlak ucunda oluşan gerilme alanının tamamen elastik kabulü ve plastik şekil değişiminin ihmal edilmesi nedeniyle bazı sınırlamalarla karşılaşılmıştır. Lineer Elastik Kırılma mekaniğindeki bu sınırlama nedeniyle non-Lineer Elastik Kırılma Mekaniğine odaklanılarak çalışmalar yapılmıştır. 1990’ lı yılarda ise özellikle kohezif bölge modeli hızlı bir gelişme göstermiştir. Tokluğu yüksek yapıştırıcıların, uygulamada artan kullanımıyla birlikte,...
Welding in the World, 2021
Nano-technological developments, which have made significant progress in recent years, have signi... more Nano-technological developments, which have made significant progress in recent years, have significant impact on the science of adhesives. Therefore, in our study, the static and fatigue strengths of single-lap joints (SLJs) incorporating nanoparticles were compared to those without nanoparticles. Steel plates were used in the adhesive joints. The results revealed that average damage load increased significantly in nanoparticle-reinforced adhesive joints. The highest damage load was obtained with 4 wt% nano-Al2O3 in epoxy adhesive. As the average damage load increased, the locus of damage changed from interfacial to the mixture of interfacial and cohesive. Also, fatigue strengths of the joints increased when the adhesive joint had nano-Al2O3 and nano-SiO2, and decreased when the adhesive joint had nano-TiO2.
Composites Part B: Engineering, 2018
Single lap joints geometry and dimensions The schematic diagram of the fixture
Composites Part B: Engineering, 2019
In this study, single lap joints were formed by adding nano-Al 2 O 3 , nano-TiO 2 and nano-Al 2 O... more In this study, single lap joints were formed by adding nano-Al 2 O 3 , nano-TiO 2 and nano-Al 2 O 3 powders in various proportions to the epoxy adhesive and using the additive-free epoxy adhesive; and also the mechanical properties of the connections were experimentally investigated at 20, 25, 30, 50 and 70 mm overlap lengths under shear load. In the experimental work, DP460 epoxy adhesive was used as adhesive and AISI 304 stainless steel plate as adherent material. When the results obtained from the experiments were examined, it was revealed that the average damage load in connection with the use of nanoparticle-added adhesives increased considerably in general. As a result of the experiments, the most effective nanoparticle in increasing the failure strength of the adhesive joints with nano-Al 2 O 3 particles and the maximum failure strength increase rate was 20 mm in overlap length and 97% in 4 wt% nano-Al 2 O 3 reinforced specimens. It was also found that the nanoparticle strain was an important parameter in the tensile strength of the adhesive joints. In addition, it has been found that the addition of nanoparticles into the adhesive increases the elongation of the joints. When the adhesion surfaces of the samples were examined as in the case of plain adhesives, damage was observed as adhesion separation while nanoparticle reinforcement was observed as a mixture of adhesion and cohesion.
Adıyaman Üniversitesi Mühendislik Bilimleri Dergisi
Yapıştırma bağlantılarının mekanik özelliklerinin belirlenmesinde kullanılan sayısal yöntemler za... more Yapıştırma bağlantılarının mekanik özelliklerinin belirlenmesinde kullanılan sayısal yöntemler zaman içerisinde gelişim göstermiştir. Başlangıçta maksimum gerilme/gerinim yöntemi kullanılarak analizler yapıldı. Bunu takiben, yapıştırma bağlantılarında oluşan hasarın bir çeşit kırılma problemi olması nedeniyle kırılma mekaniği yaklaşımları kullanılmaya başlandı. İlk olarak Lineer Elastik Kırılma Mekaniği temelli çalışmalar yoğun bir şekilde yapıldı. Lineer Elastik Kırılma Mekaniği yaklaşımıyla önemli oranda başarılı çalışmalar yapılmasına rağmen, çatlak ucunda oluşan gerilme alanının tamamen elastik kabulü ve plastik şekil değişiminin ihmal edilmesi nedeniyle bazı sınırlamalarla karşılaşılmıştır. Lineer Elastik Kırılma mekaniğindeki bu sınırlama nedeniyle non-Lineer Elastik Kırılma Mekaniğine odaklanılarak çalışmalar yapılmıştır. 1990’ lı yılarda ise özellikle kohezif bölge modeli hızlı bir gelişme göstermiştir. Tokluğu yüksek yapıştırıcıların, uygulamada artan kullanımıyla birlikte,...
Welding in the World, 2021
Nano-technological developments, which have made significant progress in recent years, have signi... more Nano-technological developments, which have made significant progress in recent years, have significant impact on the science of adhesives. Therefore, in our study, the static and fatigue strengths of single-lap joints (SLJs) incorporating nanoparticles were compared to those without nanoparticles. Steel plates were used in the adhesive joints. The results revealed that average damage load increased significantly in nanoparticle-reinforced adhesive joints. The highest damage load was obtained with 4 wt% nano-Al2O3 in epoxy adhesive. As the average damage load increased, the locus of damage changed from interfacial to the mixture of interfacial and cohesive. Also, fatigue strengths of the joints increased when the adhesive joint had nano-Al2O3 and nano-SiO2, and decreased when the adhesive joint had nano-TiO2.
Composites Part B: Engineering, 2018
Single lap joints geometry and dimensions The schematic diagram of the fixture
Composites Part B: Engineering, 2019
In this study, single lap joints were formed by adding nano-Al 2 O 3 , nano-TiO 2 and nano-Al 2 O... more In this study, single lap joints were formed by adding nano-Al 2 O 3 , nano-TiO 2 and nano-Al 2 O 3 powders in various proportions to the epoxy adhesive and using the additive-free epoxy adhesive; and also the mechanical properties of the connections were experimentally investigated at 20, 25, 30, 50 and 70 mm overlap lengths under shear load. In the experimental work, DP460 epoxy adhesive was used as adhesive and AISI 304 stainless steel plate as adherent material. When the results obtained from the experiments were examined, it was revealed that the average damage load in connection with the use of nanoparticle-added adhesives increased considerably in general. As a result of the experiments, the most effective nanoparticle in increasing the failure strength of the adhesive joints with nano-Al 2 O 3 particles and the maximum failure strength increase rate was 20 mm in overlap length and 97% in 4 wt% nano-Al 2 O 3 reinforced specimens. It was also found that the nanoparticle strain was an important parameter in the tensile strength of the adhesive joints. In addition, it has been found that the addition of nanoparticles into the adhesive increases the elongation of the joints. When the adhesion surfaces of the samples were examined as in the case of plain adhesives, damage was observed as adhesion separation while nanoparticle reinforcement was observed as a mixture of adhesion and cohesion.