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Failure Characterization Of A Graphite Epoxy Composite Laminate Using Distortion Energy
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Book Synopsis Failure Characterization of a Graphite/epoxy Composite Laminate Using Distortion Energy by : Keith D. Mazachek
Download or read book Failure Characterization of a Graphite/epoxy Composite Laminate Using Distortion Energy written by Keith D. Mazachek and published by . This book was released on 1992 with total page 610 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Failure Analysis of P75/934 Graphite/epoxy Composite Using Finite Element Modeling & Laminated Plate Theory by : Kostas Rigas
Download or read book Failure Analysis of P75/934 Graphite/epoxy Composite Using Finite Element Modeling & Laminated Plate Theory written by Kostas Rigas and published by . This book was released on 1998 with total page 262 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Tension Fatigue of Glass/epoxy and Graphite/epoxy Tapered Laminates by :
Download or read book Tension Fatigue of Glass/epoxy and Graphite/epoxy Tapered Laminates written by and published by . This book was released on 1990 with total page 68 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Failure Analysis of a Graphite/epoxy Laminate Subjected to Bolt Bearing Loads by :
Download or read book Failure Analysis of a Graphite/epoxy Laminate Subjected to Bolt Bearing Loads written by and published by . This book was released on 1984 with total page 40 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Random Delamination of Graphite/epoxy Laminated Composites by : Chao Zhang
Download or read book Random Delamination of Graphite/epoxy Laminated Composites written by Chao Zhang and published by . This book was released on 2001 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The delamination failure of laminated composites exhibits two distinct characteristics; (1) the corresponding failure strengths display considerable scatter, and (2) the morphologies of the fracture surfaces and the interlaminar strengths are dependent on the magnitude of the fiber orientation difference (abbreviated as FOD below) angle between the two adjacent plies of the interface. A variational solution technique is developed to determine the three-dimensional edge effect stresses around pin-loaded holes in symmetric laminated composites. The stress state around the holes is divided into two parts, one the in-plane stress state determined using the Classical Laminated Plate Theory (CLPT) and the other the boundary layer stress state arising from the edge effects which only exists in the vicinity of the holes. The equilibrium equations of boundary layer stress state with zeroth-order approximation are derived from a set of power expansions. Analytical solutions for the boundary layer stress state are then obtained by imposing zeroth-order stress functions on the variational principle of complementary energy. The developed variational solution technique is versatile, which can be used to calculate the edge effect stresses at straight free edges, curved free edges and pin-loaded hole edges with or without friction in laminated composites. An experimental investigation is conducted to study the effects of fiber orientations on the interlaminar shear (ILS) strengths of CYTEC ® G40-800/5276-1 graphite/epoxy laminated composites. The ILS strengths at the [straight theta]-interfaces ([straight theta] = 0°, 10°, 20°, 30°, 40°, 50°, 60°, 70°, 80° and 90°), around which the two neighboring plies have a FOD angle [straight theta], are experimentally characterized using the modified double notch shear specimens with an elaborately designed layup. A stochastic simulation model is proposed in a phenomenological sense, in which the probabilistic dependence of ILS strengths on the FOD angles [straight theta] is simulated as a non-Gaussian nonstationary stochastic process within the bounded interval [0,?/2]. Two innovative delamination criteria in terms of quadratic and cubic polynomials in each case, are developed based on the Malmeister strength theory and Hashin assumption. The intent of the developed criteria is to include the effects of [straight theta]-dependent and directionally-dependent interlaminar strengths into the failure evaluation of laminated composites, as demonstrated by the experiments in the present thesis. (Abstract shortened by UMI.).
Book Synopsis Failure Characterization of a Graphite/Epoxy Laminate Through Proof Testing by : HT. Hahn
Download or read book Failure Characterization of a Graphite/Epoxy Laminate Through Proof Testing written by HT. Hahn and published by . This book was released on 1982 with total page 27 pages. Available in PDF, EPUB and Kindle. Book excerpt: The object of the present work was to investigate the failure behavior of a [02/90/±45] AS/3501-5A graphite/epoxy laminate through proof testing. The primary emphasis was on the delineation of the effect of the proof test on the residual strength and life, the establishment of strength-life relations, and the identification of failure process. The test series consisted of static tests, tension-tension fatigue tests preceded by proof tests, and examinations of failure modes. Major findings can be summarized as follows: (1) Proof tests have little effect on the residual strength and life. (2) Strength and life are statistically interrelated so that a statically stronger specimen has a longer life. (3) A higher modulus is an indication of a higher strength and longer life. (4) The failure process of the present laminate is similar to that of the quasi-isotropic [0/90/±45]8 laminate. However, the crack multiplication in the present laminate is more extensive and faster. (5) Delamination surfaces consist of shiny and dull areas. The shiny areas have bare fibers, whereas the dull areas have fiber imprints in the epoxy.
Book Synopsis Evaluation of Failure Criterion for Graphite/epoxy Fabric Laminates by : Roderick Clarence Tennyson
Download or read book Evaluation of Failure Criterion for Graphite/epoxy Fabric Laminates written by Roderick Clarence Tennyson and published by . This book was released on 1985 with total page 50 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Characterization of Interlaminar Shear Failures of Graphite-epoxy Composite Materials by : Scott Robert Short
Download or read book Characterization of Interlaminar Shear Failures of Graphite-epoxy Composite Materials written by Scott Robert Short and published by . This book was released on 1990 with total page 268 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Failure Characteristics of Graphite-epoxy Structural Components Loaded in Compression by :
Download or read book Failure Characteristics of Graphite-epoxy Structural Components Loaded in Compression written by and published by . This book was released on 1982 with total page 32 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Ply-level Failure Analysis of a Graphite/epoxy Laminate Under Bearing-bypass Loading by :
Download or read book Ply-level Failure Analysis of a Graphite/epoxy Laminate Under Bearing-bypass Loading written by and published by . This book was released on 1988 with total page 40 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Surface Crack Analysis Applied to Impact Damage in a Thick Graphite-epoxy Composite by :
Download or read book Surface Crack Analysis Applied to Impact Damage in a Thick Graphite-epoxy Composite written by and published by . This book was released on 1988 with total page 36 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Characterization of Lamina and Interlaminar Damage in Graphite/Epoxy Composites by the Deply Technique by : SM. Freeman
Download or read book Characterization of Lamina and Interlaminar Damage in Graphite/Epoxy Composites by the Deply Technique written by SM. Freeman and published by . This book was released on 1982 with total page 13 pages. Available in PDF, EPUB and Kindle. Book excerpt: A unique technique is described for separating a cured graphite/epoxy composite into its individual laminae while maintaining the integrity of each lamina. The use of this technique provides information heretofore unavailable for fracture and failure analysis. Examples of damage characterization using this technique are presented for pin-loaded holes and impact areas. In the case of the pin-loaded holes the extent of fiber bundle fractures in the internal laminae are shown to be a function of increasing loads. For impact-damaged areas the delaminations between the various laminae were marked with a unique process prior to the deplying process. After the laminae were deplied, the indicated areas of delamination and the incidents of fiber fracture were measured using a digital image analyzer. Photographs of typical damage are included.
Book Synopsis Fracture Mechanics of Matrix Cracking and Delamination in Glass/epoxy Laminates by : M. Caslini
Download or read book Fracture Mechanics of Matrix Cracking and Delamination in Glass/epoxy Laminates written by M. Caslini and published by . This book was released on 1986 with total page 46 pages. Available in PDF, EPUB and Kindle. Book excerpt: This study focused on characterizing matrix cracking and delamination behavior in multidirectional laminates. Static tension and tension-tension fatigue tests were conducted on two different layups. Damage onset, accumulation, and residual properties were measured. Matrix cracking was shown to have a considerable influence on residual stiffness of glass epoxy laminates, and could be predicted reasonably well for cracks in 90 deg plies using a simple shear lag analysis. A fracture mechanics analysis for the strain energy release rate associated with 90 deg ply matrix crack formation was developed and was shown to correlate the onset of 90 deg ply cracks in different laminates. The linear degradation of laminate modulus with delamination area, previously observed for graphite epoxy laminates, was predicted for glass epoxy laminates using a simple rule of mixtures analysis. The strain energy release rate associated with edge delamination formation under static and cyclic loading was difficult to analyze because of the presence of several contemporary damage phenomena. Keywords: Fatigue(Mechanics), and Stiffness loss.
Book Synopsis Investigation of Failure Mechanisms in Fiber Composite Laminates by : Philip V McLaughlin (Jr)
Download or read book Investigation of Failure Mechanisms in Fiber Composite Laminates written by Philip V McLaughlin (Jr) and published by . This book was released on 1975 with total page 99 pages. Available in PDF, EPUB and Kindle. Book excerpt: An analytical investigation is made into the behavior of fiber composite laminates after initial lamina failure has occurred in top (outside) layer. The analysis investigates the relative importance of delamination of the failed layer and of stress concentrations in the adjacent lamina to the ultimate failure mechanisms of laminates. A general interlaminar stress analysis is developed which takes into account interface nonlinear behavior and delamination effects. The analysis is specialized to a laminate whose top layer contains a long crack. Laminated plate theory is used in conjunction with the interlaminar stress analysis to analyze first and subsequent failure of graphite/epoxy (0/90), (plus or minus 45), and (0/plus or minus 45) laminates under several stress states.
Book Synopsis Response and Failure Analysis of a Graphite-epoxy Laminate Containing Terminating Internal Plies by : Brian Lee Kemp
Download or read book Response and Failure Analysis of a Graphite-epoxy Laminate Containing Terminating Internal Plies written by Brian Lee Kemp and published by . This book was released on 1985 with total page 140 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Comparative Evaluation of Failure Analysis Methods for Composite Laminates by :
Download or read book Comparative Evaluation of Failure Analysis Methods for Composite Laminates written by and published by . This book was released on 1996 with total page 138 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Failure Analysis of a Graphite/Epoxy Laminate Subjected to Bolt-Bearing Loads by : JH. Crews
Download or read book Failure Analysis of a Graphite/Epoxy Laminate Subjected to Bolt-Bearing Loads written by JH. Crews and published by . This book was released on 1986 with total page 19 pages. Available in PDF, EPUB and Kindle. Book excerpt: Quasi-isotropic graphite/epoxy laminates (T300/5208) were tested under bolt-bearing loads to study failure modes, strengths, and failure energy. Specimens had a range of configurations to produce failures by the three nominal failure modes: tension, shearout, and bearing. Radiographs were made after damage onset and after ultimate load to examine the failure modes. Also, the laminate stresses near the bolt hole were calculated for each test specimen configuration, and then used with a failure criterion to analyze the test data.
