PSI - Issue 14

ScienceDirect Structural Integrity Procedia 00 (2018) 000–000 Structural Integrity Procedia 00 (2018) 000–000 Available online at www.sciencedirect.com Available online at www.sciencedirect.com ScienceDirect Available online at www.sciencedirect.com ScienceDirect

www.elsevier.com/locate/procedia

www.elsevier.com/locate/procedia

Procedia Structural Integrity 14 (2019) 900–906

2 nd International Conference on Structural Integrity and Exhibition 2018 Analytical Study of the Effects of Delamination in Glare Fiber Metal Laminate using Modified Virtual Crack Closure Technique (MVCCT) Shashidhar Naik H. G. a* , Shubha Javagal b a #8A, 80ft Ring Road, Nagarbhavi 2 nd Stage, Papreddypalya, Karnataka, Bangalore 560091. b M.Tech (Research), Department of Civil Engineering, National Institute of Technology Karnataka, Surathkal 575025. Abstract Progression in the field of materials used in an aircraft, has seen resurgence in a relatively successful Fiber-Metal Laminate called GLARE, which is composed of several layers of very thin metal (often aluminium), along with layers of uni-directional Glass Fiber pre-pregs. All the layers are bonded to each other with the use of matrix such as epoxy-resin system. The major advantage of this material is that it can be tailored to fit the stress condition by varying the orientation of the Glass Fiber layers. Furthermore, other advantages include better damage tolerance, corrosion resistance, fire resistance and low specific weight. Although GLARE is a composite material, its material properties and fabrication techniques are considered to be homogeneous aluminium like. In this paper, we try to approach this material as a composite, and determine the effect of delamination that occurs due to various reasons. To achieve this, a finite element model of size of 200 mm x 200 mm plate is generated and a compressive load in terms of initial displacement is applied. Various crack sizes at the centre of the plate along the stacking sequence is modelled and analysed. The corresponding Strain Energy Release Rates (SERR) are computed along with various other parameters such as Elemental Stress, Displacement and Contact Stresses. Modified Virtual Crack Closure Technique (MVCCT) is used to obtain the SERR values in all three modes of failure, and their direct effect on the structural integrity of the model is studied and reported. 2 nd International Conference on Structural Integrity and Exhibition 2018 Analytical Study of the Effects of Delamination in Glare Fiber Metal Laminate using Modified Virtual Crack Closure Technique (MVCCT) Shashidhar Na k H. G. a* , Shubha Javagal b a #8A, 80ft Ring Road, Nagarbhavi 2 nd Stage, Papreddypalya, Karnataka, Bangalore 560091. b M.Tech (Research), Department of Civil Engineering, National Institute of Technology Karnataka, Surathkal 575025. Abstract Prog ession in the field of materials used in an aircraft, has seen resurgence in a relatively successful Fiber-Metal Laminate called GLARE, which is composed of several layers of very thin metal (often aluminium), along with layers of uni-directional Glass Fiber p e-pregs. All t layers are bonded to each othe with t e us of matrix such s poxy-resin sy tem. Th major advantag of this material is that it can be tailored to fit the stress condition by varying the orientation f the Glass Fiber layers. Furthermore, oth advanta es include b tter damage toleran e, cor osion resistance, fire re istance and low specific weig t. Although GLARE is a composite m erial, its m terial properti s and fabrication techniques are considered to b homogen ous aluminium like. In is paper, w try to approach this material as a composite, and determine th effect of delamination that occurs due t various reasons. T achieve this, a finite element m d l of size of 200 mm x 200 mm plate is gen ated and a compressive load in terms of i itial dis lacement is lied. Various c ack izes at the c ntre of he plate along the stacking sequence is modelled and analys d. The c rresponding Stra En rgy Release Rate (SERR) are computed along w th various other para et r such s Elemental Stress, Dis lac e t and Contact Stres es. Mod fied Virtual C ack Closure Tech ique (MVCCT) is sed to obtain the SERR valu s in all thre m des of failure, and their direct eff ct on the st uctural integrity of the model i studied and reported. Keywords: Modified Virtual Crack Closure Technique, Strain Energy Release Rate, Fiber-Metal Laminate, GLARE, Delamination. © 2019 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0/) Selection and peer-review under responsibility of Peer-review under responsibility of the SICE 2018 organizers.

Keywords: Modified Virtual Crack Closure Technique, Strain Energy Release Rate, Fiber-Metal Laminate, GLARE, Delamination.

*Corresponding author. Tel.: +91-9986766783 E-mail address: naikshashidhar@gmail.com *Corresponding author. Tel.: +91-9986766783 E-mail address: naikshashidhar@gmail.com

2452-3216  2019 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0/) Selection and peer-review under responsibility of Peer-review under responsibility of the SICE 2018 organizers. 10.1016/j.prostr.2019.07.069 2452-3216 © 2018 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0/) Selection and peer-review under responsibility of Peer-review under responsibility of the SICE 2018 organizers. 2452-3216 © 2018 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0/) Selection and peer-review under responsibility of Peer-review under responsibility of the SICE 2018 organizers.