Experimental and 3D FE evaluation of crack initiation energy J_1C in Al6061-TiC composites

Article type: Research Article

Authors: Raviraj, M.S.^a; | Sharanaprabhu, C.M.^b | Mohankumar, G.C.^c

Affiliations: [a] Department of Mechanical Engineering, Government Engineering College, Chamarajanagar, India | [b] Department of Mechanical Engineering, PES Institute of Technology and Management, Shimoga, India | [c] Department of Mechanical Engineering, National Institute of Technology Karnataka, Surathkal, India

Correspondence: [*] Corresponding author. E-mail: ravirajsunkapur@gmail.com

Abstract: The test data crack initiation energy in Mode-I fracture, J1C is determined experimentally for various compositions of Al6061-TiC composites by using compact tension (CT) specimen with variable a∕W ratios. Also, 3D nonlinear (elastic-plastic) finite element analysis was carried for Compact Tension (CT) specimen to evaluate J1C, ahead at the crack-front of several Al6061-TiC composite specimens with various crack lengths. The 3D FEA J1C results were compared with the experimental results. The J1C values decrease with increasing crack length of the specimen because of decrease in load carrying capacity of the specimens. Al6061-TiC composites exhibit higher fracture toughness values than their counterparts Al-SiC composites.

Keywords: Crack initiation energy, J-integral, Al composites

DOI: 10.3233/SFC-180213

Journal: Strength, Fracture and Complexity, vol. 11, no. 1, pp. 63-72, 2018