ORCID Profile
0000-0002-9171-1515
Current Organisation
University of Bristol
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Publisher: Royal Society of Chemistry (RSC)
Date: 2018
DOI: 10.1039/C8TA03651A
Abstract: Layered structure graphene oxide/methylcellulose composite films with excellent mechanical and gas barrier properties were fabricated by a simple solvent evaporation assisted assembly.
Publisher: EDP Sciences
Date: 2012
Publisher: Elsevier BV
Date: 03-2022
Publisher: Elsevier BV
Date: 04-2014
Publisher: Elsevier BV
Date: 07-2021
Publisher: Elsevier BV
Date: 06-2019
Publisher: Wiley
Date: 09-10-2013
DOI: 10.1111/FFE.12099
Publisher: SAGE Publications
Date: 11-06-2021
Abstract: Sandwich composites with fibre-reinforced plastic facesheets and foam core have emerged as a major class of lightweight structural materials but low-velocity impact damage severely reduces the structural integrity of the component. Different methods have been proposed to improve the impact damage resistance of sandwich composites including the addition of nanoparticles to the matrix. The objective of this paper is to evaluate the effect of adding nanostrength, a block copolymer that self-assembles in the nanoscale, to the epoxy matrix on the low-velocity impact behaviour of sandwich panels with Kevlar facesheets and Rohacell foam core. Most previous studies on low-velocity impact damage used experimental testing but a combination of improved constitutive modelling of constituents and decreased computational costs make it possible to utilise continuum modelling to numerically simulate impact response of sandwich composites for a much wider range of conditions. A numerical model was developed in explicit FE software LS-Dyna and a constitutive law based on continuum damage mechanics was used for the simulation of the composite facesheets with and without the nano-reinforcements. A crushable foam model was used for the Rohacell foam core. The LS-Dyna model was validated by comparing the force, displacement measurements and damage assessment from the simulation with experimental impact tests conducted using a drop tower. The FE model shows good comparison with the experiment and a macroscopic phenomenological model is capable of capturing the impact damage behaviour of the sandwich plates with nano-reinforcements.
Publisher: EDP Sciences
Date: 2015
Publisher: Springer Science and Business Media LLC
Date: 19-07-2017
Publisher: American Society of Civil Engineers (ASCE)
Date: 02-2020
Publisher: Elsevier BV
Date: 06-2016
Publisher: Elsevier BV
Date: 06-2018
Location: United Kingdom of Great Britain and Northern Ireland
Location: United Kingdom of Great Britain and Northern Ireland
No related grants have been discovered for Karthik Ram Ramakrishnan.