Indentation Law for Composite Laminates.
S. H. Yang,C. T. Sun +1 more
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In this article, the structural properties of composite laminates with steel balls as the indentor are described and static indentation tests are described for glass/epoxy and graphite-epoxy composite lamination.Abstract:
Static indentation tests are described for glass/epoxy and graphite/epoxy composite laminates with steel balls as the indentor. Beam specimens clamped at various spans were used for the tests. Loading, unloading, and reloading data were obtained and fitted into power laws. Results show that: (1) contact behavior is not appreciably affected by the span; (2) loading and reloading curves seem to follow the 1.5 power law; and (3) unloading curves are described quite well by a 2.5 power law. In addition, values were determined for the critical indentation, alpha sub cr which can be used to predict permanent indentations in unloading. Since alpha sub cr only depends on composite material properties, only the loading and an unloading curve are needed to establish the complete loading-unloading-reloading behavior.read more
Citations
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TL;DR: A comprehensive review of past and current research work published on the dynamic response of fiber-metal laminates subjected to low velocity impact is given in this paper, which concludes with detailed discussions on the future works needed for fibre-metal Laminates.
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On the impact of initially stressed composite laminates
TL;DR: In this paper, the impact response behavior of initially stressed composite laminates is investigated using the finite element method, where an experimentally established contact law is incorporated into the program and the Newmark time integration algorithm is used for solving the time dependent equations of the plate and the impactor.
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Impact behaviour of fibre-reinforced composite materials and structures
Stephen R Reid,G. Zhou +1 more
TL;DR: In this paper, the impact damage assessment of fiber-reinforced composites using small specimens has been studied, and the impact model was used to model the impact of composite structures.
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The response of laminated composite plates under low-velocity impact loading
TL;DR: In this paper, the in-plane dimensional effect of fiber-reinforced laminated composites under low-velocity impact was evaluated with a specially developed vertical drop-weight testing machine.
References
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Journal ArticleDOI
Hertzian contact of anisotropic bodies
TL;DR: In this paper, the title problem is reduced to one of evaluating contour integrals and some explicit formulae for transversely isotropic media are presented for Hertzian impact.
Book ChapterDOI
An Analytical Method for Evaluation of Impact Damage Energy of Laminated Composites
TL;DR: In this paper, a higher order beam finite element is developed for dynamic response of beams subjected to impact of elastic spheres, and the Hertzian law is used to evaluate the contact force.
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