A5002778873- Structural Analysis and Optimization
- Carbon Nanotubes in Composites
- Aeroelasticity and Vibration Control
- Cellular and Composite Structures
- Innovations in Concrete and Construction Materials
- Polymer composites and self-healing
- Structural Analysis of Composite Materials
- Structural Engineering and Vibration Analysis
- Composite Structure Analysis and Optimization
- Polymer Foaming and Composites
- Architecture and Computational Design
- Natural Fiber Reinforced Composites
- Fiber-reinforced polymer composites
- Mechanical Behavior of Composites
- Advanced Sensor and Energy Harvesting Materials
- Vibration and Dynamic Analysis
- Vibration Control and Rheological Fluids
- Structural Behavior of Reinforced Concrete
- Dynamics and Control of Mechanical Systems
- Advanced Materials and Mechanics
- Mechanical Engineering and Vibrations Research
- Conducting polymers and applications
- Tribology and Wear Analysis
- Textile materials and evaluations
- Space Satellite Systems and Control
Istanbul Technical University
2014-2024
Pennsylvania State University
2016-2018
In this paper, a method to obtain effective continuum beam stiffness properties of tensegrity towers with struts in each bay is developed. Long for space applications can be modeled as beam-like structures, and axial, bending, shear, torsional used make comparisons between alternatives determine the optimum design mission. Continuum models Class-2 are obtained using modified energy equivalency approach. Self-stress levels (i.e., cable tension strut compression) varied observe their influence...
In this paper, general methods for the analysis of deployment n-strut cylindrical Class-1 and Class-2 tensegrity booms are developed. Investigation geometries leads to comprehensive procedures with an arbitrary number (n) struts in each stage. For booms, equilibrium surfaces that show collection feasible azimuth declination angle pairs corresponding self-equilibrated obtained numerically. Deployment is achieved by varying parameters while remaining on surface. two strategies, one...
Sandwich composites stand out especially in the aerospace industry owing to their high strength-to-weight ratio, one of most prominent factors for material selection. Polymeric foams as core sandwich are likely prevent delamination between face sheets and by augmenting contact surface area, resulting from closed-cell structure. foam properties can be enhanced adding nanomaterials such carbon nanotubes (CNTs), however increased CNT content or type CNTs might arise critical problems...
Mechanical metamaterials with negative Poisson's ratio, called auxetic structures, typically consist of specially-designed lattice geometries repetitive units. Auxetics offer high indentation and impact resistance expected to be used as potential lightweight materials in air space industry by increasing the energy absorption almost no weight increase filling unit cells polymeric foams. This study addresses reinforcement re-entrant structures polyurethane foams, via manual placement...
In this study the closed-loop vibrational behavior of aircraft wing is investigated. The modeled as a thin-walled composite beam with diamond shaped cross-section. This model incorporates number non-classical effects such material anisotropy, transverse shear deformation and warping restraint. Moreover, directionality property beams produces wide range elastic couplings. respect, an anti-symmetric lay-up configuration i.e. Circumferentially Uniform Stiffness (CUS) employed to generate...
In this study we investigated the dynamical behavior of aircraft wings and using piezoelectric actuation implemented active vibration control. The wing is modeled as a thin-walled composite beam having cross section diamond shaped. dynamic response under varying proportional velocity feedback gain parameters obtained shown to be enhanced with optimal control procedure, minimizing effort response.
Carbon nanotubes (CNTs) have recently emerged as a promising reinforcement for polyurethane (PU) foam, with potential applications in the aerospace industry. This study focuses on comprehensive evaluation of mechanical and viscoelastic properties CNT-reinforced PU foam through compression tests dynamic analyses (DMA). The investigation encompasses samples 0.05 wt.%, 0.075 0.1 wt.% CNT reinforcement, well neat all possessing density 100 kg/m3. Notably, compressive modulus values foams...
Mechanical metamaterials having a negative Poisson ratio, called auxetic metamaterials, exhibit high specific strength and excellent energy absorption capacity, allowing them to be implemented as potential absorbers vibration dampers in aerospace structures. In addition their intrinsic promising features, the structural integrity capability of structures can enhanced by polymeric foam reinforcement. Rigid polyurethane (PU) foams, family have been frequently utilized foam-filling studies...
Mechanical metamaterials have been attracting researchers for their outstanding mechanical properties including high strength, impact resistance, and energy absorption capacity. Auxetic structures, a special family of metamaterials, exhibit negative Poisson’s ratio which can typically be achieved by lattice designs. As result the ratio, auxetic structures offer indentation resistance since as deformation occurs, materials in adjacent region try to fill area under compression. Filling...
In this study the closed-loop vibrational behavior of aircraft wing is investigated. The modeled as an adaptive thin-walled composite beam with a kite type cross section. Several non-classical effects inherently exist in model resulting from theory such material anisotropy, transverse shear deformation and warping restraint. case, anti-symmetric lay-up configuration i.e. Circumferentially Uniform Stiffness (CUS) employed to form transverse-lateral bending coupled motion amongst numerous...
Aktif titreşim kontrol metotlarının geliştirilmesi ve uygulanması günümüzde hava uzay yapılarının performans gerekliliklerini sağlamak verimliliklerini iyileştirmek açısından oldukça önemli bir konu haline gelmiştir. Bu ilginin en büyük sebebi bu tarz malzemelerin havacılık uzay, otomotiv, helikopter turbo makinelerin palleri robot kolları gibi çeşitli farklı yapılara kolayca uyarlanabilmesi kullanılabilir durumda olmasından kaynaklanmaktadır. Akıllı veya uyarlanabilir kullanımı ile,...
Düzlem-dışı yükleme durumlarında karşılaşılan düşük katmanlararası mekanik özellikler, cam fiber takviyeli kompozitlerin (GFRP) sahip olduğu en büyük kusurlardan biris olarak bilinmektedir. Fiber üzerinde hiyerarşik yapıdaki nano boyutta güçlendiriciler (örneğin: karbon nanotüpler (KNT’ler)), oldukları sıradışı özellikler ve yoğunlukları sayesinde özelliklerini geliştirmek için kullanılmaktadır. Bahsedilen bu iyileştirmeler, yapıda herhangi bir ciddi ağırlık artışına sebep olmadan...
Utilizing the grown carbon nanotubes (CNTs) on nanofibers having high surface area provides an ability to tailor mechanical, electrical and thermal performance in various applications such as lithium-sulfur batteries, laminated composites, supercapacitors. In this study, growth of CNTs curved polymeric nanofibrous substrates is conducted address single-step synthesis polybenzimidazole (PBI) interlayer, which benefits from synergetic effect PBI nanofiber network stiff conductive CNTs. The...