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Numerical and experimental investigation on lap shear fracture of Al/CFRP laminates

Naghipour, Parya and Schulze, Karola and Hausmann , Joachim and Bartsch, Marion (2012) Numerical and experimental investigation on lap shear fracture of Al/CFRP laminates. Composites Science and Technology, 72, pp. 1718-1724. Elsevier.

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Abstract

This paper presents a new approach to numerically investigate the lap shear fracture of a hybrid laminate made of Carbon Fibre Reinforced Plastic (CFRP) and metal foil plies (e.g. aluminium), validated by corresponding experiments. The numerical Finite Element (FE) model of the hybrid laminate, subjected to lap shear fracture, is composed of five laminas with alternating metal/CFRP layers with cohesive elements lying within Al/CFRP interface. In the FE model, individual CFRP laminas are assumed as an orthotropic homogenized continuum under plane stress, and aluminium facesheets are modelled as an elastic–plastic continuum. The Al/CFRP interface is represented via quadratic cohesive elements, the constitutive law of which is an exponentially decaying law representing the degrading behaviour of the interface (implemented as user element in ABAQUS). The numerical model captures the experimentally obtained results with minimal error, and predicts the failure modes successfully. The influence of specimen geometry (e.g. overlap length, total length, and total width) on lap shear fracture response is analyzed in detail in this study, too, in order to confirm the specimen design for the test, as there is still no corresponding test standard for hybrid laminates.

Item URL in elib:https://elib.dlr.de/79391/
Document Type:Article
Title:Numerical and experimental investigation on lap shear fracture of Al/CFRP laminates
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Naghipour, ParyaDLR WF (ENM)UNSPECIFIED
Schulze, KarolaDLRUNSPECIFIED
Hausmann , JoachimDLRUNSPECIFIED
Bartsch, MarionDLR WF (ENM)UNSPECIFIED
Date:2012
Journal or Publication Title:Composites Science and Technology
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:Yes
Volume:72
Page Range:pp. 1718-1724
Publisher:Elsevier
Status:Published
Keywords:Hybrid composites, Interfacial strength, Finite element analysis (FEA), Lap shear fracture
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Aeronautics
HGF - Program Themes:Aircraft Research (old)
DLR - Research area:Aeronautics
DLR - Program:L AR - Aircraft Research
DLR - Research theme (Project):L - Structures & Materials (old)
Location: Köln-Porz
Institutes and Institutions:Institute of Materials Research > Experimental and Numerical Methods
Deposited By: Bartsch, Dr.-Ing. Marion
Deposited On:04 Dec 2012 10:16
Last Modified:30 May 2019 22:05

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