In the far north, low temperatures and atmospheric icing are a major danger for safe operation of wind turbines. It can cause several problems in fatigue loads, balance rotor aerodynamics. With aim improving rigidity turbine blade, composite materials currently being used. A numerical work aims to evaluate effect ice on blades determine most adequate material under conditions. Different thickne...

Bu çalışma, deneysel ve sayısal olarak kompozit yamalar ile tamir edilen çatlaklı sandviç kirişlerin eğilme darbe davranışını araştırmaktadır. Sandviç kiriş elemanları yüzey tabakaları, cam elyaf takviyeli kompozit, köpük çekirdek, PVC malzeme yapıştırıcı tabakalardır. Üst tabakasına çatlak oluşturularak hasar verilmiştir yama yapıştırılarak edilmiştir. Düşük hızlı davranışı, farklı malzemeleri...

Several approaches for simulating ultrasound are available. The main tools are Finite or Boundary element methods and the spatial impulse response methods. Finite and Boundary Element methods are the most flexible but also the most computationally expensive tools available. On the other hand the spatial impulse response is restricted only to linear acoustic problem, but with low computational d...

In the selective laser sintering (SLS) manufacturing technique a pre-heated layer of material powder undergoes a laser radiation in a selective way to produce three dimensional metallic or polymeric solid parts. Here, we consider sintering of polymer powder. The phase transformation in this process involves the material heat transfer which is strongly affected by the material sintering phenomen...

The paper presents a simple but efficient new numerical scheme for the integration of nonlinear constitutive equations. Although it can be used for integration of system of algebraic and differential equations in general, the scheme is primarily developed for use with direct solution methods for solving boundary value problems, e.g. explicit dynamic analysis in ABAQUS/Explicit. In the developed...

In order to ascertain the fire resistance performance of recycled aggregate concrete (RAC) components with different concrete compressive strengths, four full-scaled concrete columns were designed and tested under high temperature. Two of the four specimens were constructed by normal concrete with compressive strength ratings of C20 and C30, respectively, while the others were made from recycle...