Experimental and analytical investigation on the compressive response of GRP plain woven thick composite

Prabhakaran K. Centala; Zhengfang Qian; Akhtar S. Khan

doi:10.1117/12.269858

20 March 1997 Experimental and analytical investigation on the compressive response of GRP plain woven thick composite

Prabhakaran K. Centala, Zhengfang Qian, Akhtar S. Khan

Proceedings Volume 2921, International Conference on Experimental Mechanics: Advances and Applications; (1997) https://doi.org/10.1117/12.269858
Event: International Conference on Experimental Mechanics: Advances and Applications, 1996, Singapore, Singapore

Abstract

Investigations comprising of experimental observations and analytical study have been systematically executed to evaluate the compressive response of a particular composite system which has potential for structural armor applications. The material being a multi-layered thick laminate is a random mode stacking of bi-axial, plain weave S2-Glass/S2-Glass fiber yarns with polyester resin (Cycom 4102) as binder material, thirty two percent by weight. Attention is focused to understand the three dimensional macroscopic behavior of the material subjected to unidirectional quasi-static and dynamic compressive loading conditions using state of the art procedures. Quasi-static (low to medium strain rates) experimental investigations were carried out on an MTS test system while the dynamic response was observed using the split Hopkinson pressure bar test equipment and on a modified Hopkinson pressure bar termed direct disk impact. A comparison of the results of the two setup is presented. The uniformity of the material's response is verified for different sized and shaped specimens. The material's elastic constants, strength and strain rate effects in the region of 10^-5 - 10³ sec^-1 are reported in this paper. The directional failure modes under compressive loading are discussed with the aid of scanning electron micrographs. Based upon the physical construction of the composite, a unit cell representation is presented for analytical modeling. The numerical results of this model is compared to that of the experiment results obtained.

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Prabhakaran K. Centala, Zhengfang Qian, and Akhtar S. Khan "Experimental and analytical investigation on the compressive response of GRP plain woven thick composite", Proc. SPIE 2921, International Conference on Experimental Mechanics: Advances and Applications, (20 March 1997); https://doi.org/10.1117/12.269858

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KEYWORDS

Composites

3D modeling

Information operations

Dynamical systems

Failure analysis

Photomicroscopy

Diamond machining

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