Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 15 of 15 for “"laminated composite structures"”.
-
Progressive failure analysis of laminated composite structures
… analysis is presented that is applicable to thin composite structures undergoing large deformations. The method is based on a nonlinear shell theory that accounts for geometric and material nonlinearities. An isoparametric, displacement-based finite element formulation is used to discretize the …
-
Progressive Failure Analysis of Laminated Composite Structures
Laminated composite structures have started to play a very significant role in today's aircraft industry. The application of composite materials has now gone beyond the borders of aircraft design and has entered into such fields as automotive, athletics and recreational equipment, etc. The light …
-
Hierarchical material models with microstructure for nonlinear analysis of progressive damage in laminated composite structures
… models for the analysis of progressive damage in laminated structures. Each approach is generally a synthesis of three components: a nonlinear material model for the matrix behavior; a micromodel for the unidirectional lamina; and a sublaminate model for a repeating ply stacking sequence. Newly …
-
Analysis of Static and Dynamic Deformations of Laminated Composite Structures by the Least-Squares Method
Composite structures, such as laminated beams, plates and shells, are widely used in the automotive, aerospace and marine industries due to their superior specific strength and tailor-able mechanical properties. Because of their use in a wide range of applications, and their commonplace in the …
-
Development of partial hybrid finite elements for 3-D global/local analysis of laminated composite structures
… stress finite elements for stress analysis of laminated composite structures. Based on the composite variational principle, the general formulations of partial hybrid single-layer finite element and multilayer finite element are presented. These formulations can be used to develop a series of …
-
Large deformation analysis of laminated composite structures by a continuum-based shell element with transverse deformation
… for the transient large deformation analysis of laminated composite plate/shell structures. In order to satisfy the plate/shell surface traction boundary conditions and to have accurate stress description while maintaining the low cost of the analysis, a newly assumed displacement field theory is …
-
Nonlinear analysis of laminated composite shells using a micromechanics-based progressive damage model
… model for progressive failure analysis of laminated composite shell structures has been developed and implemented. The model couples a finite element model for nonlinear analysis of laminated shells with a micro mechanics elasticity solution for predicting failure and effective composite …
-
Structural optimization for control of stiffened laminated composite plates using nonlinear mixed integer programming
… structural optimization on control of stiffened laminated composite structures is considered. The structural optimization considered here, is the maximization of structural frequencies of the structure subject to maximum weight and frequency separation constraints and an upper bound on weight. …
-
Nondestructive evaluation and underwater repair of composite structures
Composite materials are gaining popularity in U.S. Naval applications because of their unparalleled strength, stiffness, and manufacturing simplicity. A better understanding of the structural integrity of these materials has the potential to reduce overdesign, decrease manufacturing cost, and …
-
Geometric and material nonlinear effects in elastic-plastic and failure analyses of anisotropic laminated structures
… procedure to predict the strength and failure of laminated composite structures under monotonically increasing static loads is presented. A degenerated 3-D shell finite element that includes linear elastic and plastic material behavior with full geometric nonlinearity is used to determine stresses …
-
Discrete Damage Mechanics Applied To Transverse Matrix Cracking
… reduction due to transverse matrix cracking in laminated composite structures is implemented as a user subroutine in Abaqus. The assumptions of the model are a symmetric laminate under in-plane loads and linear distribution of intralaminar shear stresses. The model was latter validated using 3D …
-
Surrogate-based global optimization of composite material parts under dynamic loading
The design optimization of laminated composite structures is of relevance in automobile, naval, aerospace, construction and energy industry. While several optimization methods have been applied in the design of laminated composites, the majority of those methods are only applicable to linear or …
-
Structural analysis and multidisciplinary design of flexible fluid loaded composite canard
<p>Mechanical performance of a composite canard subject to static aerodynamic loads was numerically studied in the present research. The canard was modeled as a symmetrically laminated curved panel, consisting of 8 plies of T300/5208 graphite/epoxy composite laminate. Modeling of this …
-
Finite element modelling and analysis of composite flywheel disk including effects of filament-winding mosaic pattern
A filament-wound spinning composite disk is characterised by the mosaic-patterned configuration of the layers produced during a filament-winding process. In this structure, each helically wound layer consists of curved triangular-shaped units alternating in the radial and circumferential …
-
Dynamic Response of Linear/Nonlinear Laminated Structures Containing Piezoelectric Laminas
… vibrations of a simply supported rectangular laminated composite plate with piezoelectric (PZT) actuator and sensor patches either embedded in it or bonded to the its surfaces. It is assumed that different layers are perfectly bonded to each other. The method of Fourier series is used to find …