ABSTRACTBulletproof composite armor models are investigated using finite element software ANSYS/AUTODYN. A composite plate is modelled with Kevlar 29/epoxy, analysed, and the results obtained by this model are confirmed with the results available in the literature. Different materials are tested as secondary materials in the composite plate. The results obtained by these materials for unit weight and for residual velocities of the projectile are compared. A new stacking sequence study is conducted with the Kevlar 29/epoxy as primary material and Ultra High Molecular Weight Polyethylene (UHMWPE ...Daha fazlası
Poliüretan çeşitli polioller ve diizosiyanatların reaksiyonu ile mekanik, termal, kimyasal özellikleri kontrol edilebilen önemli polimerlerdendir. Yalıtım köpükleri, mobilya uygulamaları, otomotiv, kaplama ve biyomedikal gibi geniş uygulama alanına sahiptirler. Bu çalışmada ticari ve biyo-kökenli poliüretan köpükler üretilip özellikleri incelenmiştir. Ticari (polieter) poliol, ham gliserol, metanolü uzaklaştırılmış ham gliserol ve saf gliserol poliol olarak kullanılmıştır. Tüm polioller polimerik difenilmetan diizosiyanat (PMDI) ile reaksiyona sokularak yalıtım köpükleri üretilmiştir. Ham glis ...Daha fazlası
ABSTRACTSurface modification of indium tin oxide (ITO) is a crucial factor to alter the energy level barrier between ITO and perovskite that has direct influence on the charge extraction and recombination at interface. This henomenon has further direct effect on device parameters such as open circuit voltage (VOC), fill factor (FF), and short circuit current density (JSC). This study was base on the synthesis of six novel SAM molecules to be used in fabrication of p-i-n type perovskite solar cells. Since proposed SAMs are of push-pull type molecular nature, contiguous thiophene rings were used ...Daha fazlası
ABSTRACTIn the last century, the energy demand of the world has been continuously increasing, and new and more environment-friendly energy sources search continues.As a result, Solar Cells have emerged as a renewable energy type. With the fact that when the sun is used efficiently it is a constant source of energy and a never-ending source of energy all over the world, triggering scientific studies on this subject and intensifying studies on solar batteries.With the influence of the economic factors in the materials, this issue has come up in three phases day by day. The fact that it is cheap, ...Daha fazlası
6698 sayılı Kişisel Verilerin Korunması Kanunu kapsamında yükümlülüklerimiz ve çerez politikamız hakkında bilgi sahibi olmak için alttaki bağlantıyı kullanabilirsiniz.