Thermal loading effects on crep composites

Dara, Besim Gökçe


Free bending vibrations of integrally-stiffened and/or stepped-thickness rectangular plates or panels with a non-central plate stiffener
Yuceoglu, U.; GEMALMAYAN, NİHAT; Sunar, O. (2007-11-16)
The present study is primarily concerned with the "Free Bending Vibrations of Integrally-Stiffened and/or Stepped-Thickness Plates or Panels with a Non-Central Plate Stiffener". The general theoretical formulation is based on the "Mindlin Plate Theory". The plate elements of the system are considered to be made of dissimilar orthotropic materials with unequal thicknesses. The transverse shear deformations and the transverse and the rotary moments of inertia of plate elements are included in the analysis. Th...
Forced vibration analysis of generally laminated composite beams using domain boundary element method
Ahmed, Zubair; Dağ, Serkan; Department of Mechanical Engineering (2018)
Forced dynamic response of generally laminated composite beam is analyzed by boundary element method. Static fundamental solutions are used as weight functions in the weighted residual statements. The use of static fundamental solutions gives rise to a new formulation named as Domain Boundary Element Method. Displacement field of the generally laminated composite beam is written in accordance with first order shear deformation theory and equations of motion are derived using Hamilton’s principle. Developed ...
Failure analysis of tapered composite structures under tensile loading
Çelik, Ozan; Parnas, Kemal Levend; Department of Mechanical Engineering (2016)
A three dimensional finite element modeling approach is used to evaluate the effects of preliminary design variables on the performance of tapered composite laminates under tensile loading. Hashin failure criteria combined with a progressive failure algorithm is used for in-plane failure mechanisms and cohesive zone method is used for out-of-plane failures. The modeling approach is validated by a comparison with experimental results from literature. The validated model is used to examine various design vari...
Numerical investigation of stiffened composite panel into buckling and post buckling under combined loading
Akay, Erkan; Yaman, Yavuz; Department of Aerospace Engineering (2015)
This thesis presents the investigation of buckling and post buckling behaviour of stiffened thin walled laminated composite aerospace structures subjected to combined in-plane axial and shear loadings. Due to the fact that the state of stress developing especially in the post-buckling stage is quite complicated under the combined loading, the necessary computational model is usually based on Finite Element Modelling (FEM). In this study, after verifying the FEM methodology and completing the sensitivity stu...
Progressive failure analysis of composite shells
Olcay, Yasemin; Darendeliler, Haluk; Department of Mechanical Engineering (2012)
The objective of this thesis is to investigate the progressive failure behavior of laminated fiber reinforced composite shell structures under different loading conditions. The laminates are assumed to be orthotropic and the first order shear deformation theory is applied. Three-node layered flat-shell elements are used in the analysis. To verify the numerical results obtained, experimental and analytical results found in literature are compared with the outputs of the study, and the comparison is found to ...
Citation Formats
B. G. Dara, “Thermal loading effects on crep composites,” Ph.D. - Doctoral Program, Middle East Technical University, 2001.