Journal ArticleDOI
Characterization of Matrix Crack-Induced Laminate Failure—Part I: Experiments:
Patrick E. Johnson,Fu-Kuo Chang +1 more
TLDR
In this paper, the impact of matrix cracking-initiated damage on the response and the strength of composite laminates subjected to uniaxial tension was investigated, and the results of the experimental study are presented in this paper.Abstract:
An investigation was performed to study the impact of matrix cracking-initiated damage on the response and the strength of composite laminates subjected to uniaxial tension. Both experiments and analysis were conducted during the investigation. Extensive tests were performed on specimens with specially tailored ply orientations to characterize damage initiation and propagation induced by matrix cracks. The focus of the experiments was to characterize the matrix crack-induced damage progression and failure modes in composite laminates under uniaxial tension loads. Four basic damage modes were observed from the results of the study: matrix crack-induced microcracking, matrix crack-induced delamination, angle-ply-induced edge delamination, and Mode I edge delamination. The results of the experimental study are presented in this paper. Results from the analytical work will be presented in a subsequent paper.read more
Citations
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Book
Damage and Failure of Composite Materials
TL;DR: In this paper, the authors provide a complete guide to composite material damage, fatigue, and failure, focusing on the underlying principles governing composite damage, reviewing basic equations and mechanics theory, before describing mechanisms of damage such as cracking, breakage and buckling.
Journal ArticleDOI
Mesh‐independent matrix cracking and delamination modeling in laminated composites
TL;DR: In this article, the initiation and evolution of transverse matrix cracks and delaminations are predicted within a mesh-independent cracking (MIC) framework, which is a regularized extended finite element method (x-FEM) that allows the insertion of cracks in directions that are independent of the mesh orientation.
Journal ArticleDOI
Effect of Glass Fiber Hybridization on the Behavior Under Impact of Woven Carbon Fiber/Epoxy Laminates
TL;DR: In this article, the impact behavior of hybrid laminates manufactured by RTM with woven carbon and glass fabrics was studied using X-ray microtomography, and the results of these analyses, together with those of the impact tests, were used to elucidate the role played by glass fiber hybridization on the fracture micromechanisms and on the overall laminate performance under low-velocity impact.
Journal ArticleDOI
An experimental study on matrix crack induced delamination in composite laminates
TL;DR: In this article, an experimental campaign focused on the occurrence of matrix cracking and delamination induced by matrix crack is presented, and five different carbon-epoxy lay-ups have been tested under tensile load, leading to different damage evolutions.
Journal ArticleDOI
Evolution and influence of residual stresses/strains of fiber reinforced laminates
TL;DR: In this article, a meso/micromechanical study of fiber reinforced polymeric matrix cross-ply laminates during and after a high temperature curing process is presented, focusing on the generation and evolution of the curing induced residual stress/strain and their influence on the response under subsequent mechanical loading.
References
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Book ChapterDOI
Stiffness-reduction mechanisms in composite laminates
AL Highsmith,Kenneth Reifsnider +1 more
TL;DR: In this paper, the authors report the results of an experimental program and an analytical modelling exercise which indicate that much of the observed matrix cracking can be predicted and the effects on stiffness calculated with various degrees of accuracy depending upon the sophistication of the model used.
Journal ArticleDOI
Stress fields in composite laminates
TL;DR: In this article, a new theory is proposed to define the complete stress field within an arbitrary composite laminate, based upon an extension of Reissner's variational principle to laminated bodies.
Journal ArticleDOI
Some Observations on the Interlaminar Strength of Composite Laminates
N. J. Pagano,R. Byron Pipes +1 more
TL;DR: In this article, a detailed design of a laminate specimen which can exhibit catastrophic delamination induced by interlaminar tension is presented, along with a preliminary failure hypothesis to characterize this mode of rupture and the associated experimental demonstration of the phenomena.
Journal ArticleDOI
The initiation and growth of delaminations induced by matrix microcracks in laminated composites
John A. Nairn,S. Hu +1 more
TL;DR: In this article, a variational mechanics analysis of microcracking damage in cross-ply laminates of the form /(S)/90n/s, where (S) is any orthotropic sublaminate much stiffer than /90n/, has been extended to account for the presence of delaminations emanating from the tips of micro-cracks in the /90 2n/T sublaminates, and the new two-dimensional stress analysis is used to calculate the total strain energy, effective modulus, and longitudinal thermal expansion coefficient for a laminate