Constitutive formulation of strain-rate sensitive deformation in orthotropic composites

Micallef, K, Soleiman-Fallah, A, Curtis, PT, Pope, DJ and Louca, LA (2011) Constitutive formulation of strain-rate sensitive deformation in orthotropic composites WIT Transactions on Modelling and Simulation, 51. pp. 397-408.

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Abstract

The aim of the current study is to develop a constitutive model which captures the full orthotropic behaviour of a laminated composite by employing 9 material parameters and also taking into account strain-rate sensitivity to loading. The formulation is an extension of the work by Ogihara and Reifsnider (DOI: 10.1023/A:1016069220255), whose model considers 4 parameters, and with the inclusion of strain-rate effect considerations using the method employed by Thiruppukuzhi and Sun (DOI: 10.1016/S0266-3538(00)00133-0). A plastic potential function which can describe plasticity in all directions, including fibre plasticity, is chosen and using an associated flow rule, the plastic strain-rate components are derived. The plastic compliance matrix is assembled, using a rate-dependent visco-plastic modulus. The elastic compliance matrix is combined with its plastic counterpart to give a rate-form constitutive law. It is found that the proposed model accounts for strain-rate dependence and by correct choice of model parameters, the model can also be used for various composite architectures, including woven and uni-directional architectures. © 2011 WIT Press.

Item Type:	Article
Authors :	Name Email ORCID Micallef, K k.micallef@surrey.ac.uk Soleiman-Fallah, A Curtis, PT Pope, DJ Louca, LA
Date :	1 December 2011
DOI :	10.2495/CMEM110356
Depositing User :	Symplectic Elements
Date Deposited :	17 May 2017 12:47
Last Modified :	17 May 2017 12:47
URI:	http://epubs.surrey.ac.uk/id/eprint/836736

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