Results 171 to 180 of about 18,796 (217)

POSTBUCKLING OF LAMINATED COMPOSITES WITH DELAMINATIONS

34th Structures, Structural Dynamics and Materials Conference, 1993
Summary: Postbuckling analysis of laminated composites with delaminations is presented. A finite element method based on a layerwise laminated composite plate theory is developed to formulate and solve the problem. Geometric nonlinearity in the sense of von Kármán and imperfections in the form of initial global deflection and initial delamination ...
Lee, Jaehong, Gürdal, Zafer, Griffin, O. Hayden jun.   +2 more
openaire   +1 more source

Acoustic Emission in Composite Laminates

Journal of Nondestructive Evaluation, 1998
The response of a laminated plate to internal acoustic emission events is examined in detail. The plate consists of four layers of a unidirectional fiber composite material arranged in a cross-ply configuration. The sources considered include a vertical line couple, a horizontal line couple and a line double couple without moment.
openaire   +1 more source

Strength of composites repaired by laminating with dissimilar composites

The Journal of Prosthetic Dentistry, 1988
D efective composite restorations are usually replaced by completely removing the existing material. However, certain clinical conditions may make it advisable to remove only a portion of the existing restoration before the addition of new material. For example, this technique might be preferred if the existing restoration is near the pulp, retained by
E C, Kao, H G, Pryor, W M, Johnston
openaire   +2 more sources

INTELLIGENT TAILORING OF COMPOSITE LAMINATES

Carbon, 1989
Abstract A number of major failure modes in epoxy-matrix composites are reviewed including free edge opening mode delamination, free edge interlaminar shear controlled laminate failure, and impact damage. Methods for suppressing these failure modes through various laminate tailoring techniques are discussed.
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The Consolidation of Laminate Composites

Journal of Composite Materials, 1987
A general mathematical model wich allows for three dimensional flow, and one dimen sional consolidation of the composite, is developed. The model assumes that the fibers make up a deformable, nonlinear elastic network. The resin flow is modelled using Darcy's Law for an anisotropic porous medium, with a resin of time varying viscosity. The general case
Timothy G. Gutowski, Tadahiko Morigaki, null Zhong Cai   +2 more
openaire   +1 more source

Composite Lamination to Wood

Polymers and Polymer Composites, 1996
In order to enhance the stiffness and strength characteristics of wood, hybrid laminates consisting of spruce wood with (a) graphite-epoxy and (b) polyester-glass cloth were made. These hybrid laminates were tested for tension, three-point bending and cantilever bending to estimate the effectiveness of the lamination.
R.M.V. Pidaparti, K. Johnson
openaire   +1 more source

Compression failure of composite laminates

2016
This chapter describes the application of a cohesive zone model to estimate the open-hole compressive (OHC) strength of composite laminates and to study the level-ply scaling effect on notch sensitivity. The modeling strategy is to replace the inelastic deformation associated with plasticity or microbuckling with a line crack and to assume some form of
openaire   +2 more sources

Laminate theory: macroanalyses of composite laminates

1993
It has been shown in chapter 2 that composite materials are manufactured as laminates, consequently in analysing the lamina, the primary aim is to obtain predictions of the average behaviour of the composite from the properties of the components. From the point of view of the mechanical properties of the composite lamina, the area of interest to the ...
openaire   +1 more source

Non-conventional Composite Laminates – Clutch Laminates

American Society for Composites 2017, 2017
This paper presents the design and manufacturing of novel non-conventional woven composite laminates coined as clutch laminates. Carbon/epoxy clutch laminates are manufactured using prepreg slit tape in an automated fiber placement (AFP) machine. The AFP process allows tailoring the material architecture resulting in innovative structures without the ...
MICHAEL J. L. VAN TOOREN, SUBRAMANI SOCKALINGAM   +1 more
openaire   +1 more source

Stress Fields in Composite Laminates

International Journal of Solids and Structures, 1978
A new theory is proposed to define the complete stress field within an arbitrary composite laminate. The theory is based upon an extension of Reissner’s variational principle to laminated bodies. Weaknesses in previous laminate theories are discussed and it is demonstrated how these are overcome in the present formulation.
openaire   +1 more source