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 12 of 12 for “"Composite failure"”.
-
Optimal design and testing of laminated specimens to evaluate competing composite failure criteria
… find areas of maximum disagreement between the failure criteria of Tsai and Hart-Smith. The Tsai criterion is quadratic in the stresses and employs a selective and progressive ply-by-ply degradation scheme to predict ultimate load. Hart-Smith’s criterion is based on a fiber shear failure of the …
-
The interfacial shear stress failure of flawed fiber composites
… in a uniaxially aligned fiber reinforced composite. The strength of elemental volumes of fiber, used in this derivation are inferred from 1ength versus strength tests.on individual fibers. The fibers are assumed to have statistically distributed flaws that allow characterization of fiber …
-
Finite Element Modeling of Delamination Damage in Carbon Fiber Laminates Subject to Low-Velocity Impact and Comparison with Experimental Impact Tests Using Nondestructive Vibrothermography Evaluation
<p>Carbon fiber reinforced composites are utilized in many design applications where high strength, low weight, and/or high stiffness are required. While composite materials can provide high strength and stiffness-to-weight ratios, they are also more complicated to analyze due to their …
-
Edge caps for reinforcing composite laminates
… cap designs are evaluated. A three-dimensional composite failure criterion and finite element analysis are used in a progressive laminate failure analysis to predict the failure load of the reinforced luminate. The results of an experimental program are presented. Cappad laminates are shown to …
-
Healing of complex damage modes in model composites
… has potential to extend the usable lifetime of composite materials. Introducing self-healing systems to fiber reinforced composites has proven to be difficult due to the high temperatures and pressures of processing as well as the requirement that the delivery scheme for the healing agent must …
-
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 …
-
An Intelligible Software (CFA) Approach for Fiber-Reinforced Laminate Failure Analysis Including a Piecewise Representation of the Tsai-Wu Failure Criterion Using Excel and MatLab
… the past century. Consequently, the use of these composite materials for aircraft weight reduction has been investigated for decades.</p> <p>The aerospace industry often uses composite materials to make a laminated composite structure where each constituent ply of the laminate has its own material …
-
The Effect of Atmospheric Aging on a Hybrid Polymer Matrix Composites' Material Properties
<p>Mechanical failure modes associated with elevated temperature exposure of the load bearing unidirectional hybrid composite (based upon glass and carbon fibers reinforcing a high temperature epoxy matrix) of a next generation transmission line design were investigated in this research. In …
-
Lengthscale effects in the damage and failure of composites
… lengthscale effects associated with damage in composite materials and their structures, and to determine how these lengthscales vary across levels of composites and can be used in assessing the overall response of composite structures. This is an advancement in a much larger pursuit towards …
-
The response of concave singly curved fibre reinforced moulded sandwich and laminated composite panels to blast loading
Composite materials are increasingly being used in a wide range of structural applications. These applications range from bicycle frames and building facades to hulls of marine ships. Their popularity is due to the high specific strength and stiffness properties, corrosion resistance, and the …
-
Thin-walled composite deployable booms with tape-spring hinges
Deployable structures made from ultra-thin composite materials can be folded elastically and are able to self-deploy by releasing the stored strain energy. Their lightness, low cost due to smaller number of components, and friction insensitive behaviour are key attractions for space applications. …
-
Failure Mode Identifications Of Rc Beams Externally Strengthened With
… the reinforced concrete beams and compare their failure modes. The main goal is to determine the CFRP design on the reinforced concrete beams that result in a progressive and gradual failure mode with enough warning before final failure. Different CFRP designs are investigated and compared with …