Failure load evaluation and prediction of hybrid composite double lap joints

Hybrid joints are a combination of adhesive bonding and mechanical fastening and are known to combine the advantages of both joint types. In this paper, we evaluate and compare the strengths of mechanical joints, adhesive joints and hybrid composite joints. We manufactured and tested 10 hybrid joint specimens with different width-to-diameter (w/d) ratios, edge-to-diameter (e/d) ratios and adherend thicknesses. Additionally, the strengths of the hybrid joints were predicted using the Failure Area Index (FAI) method and the damage zone method, and we compared our theoretical predictions with our experimental results. From these data, we were able to predict hybrid joint strengths to within 23.0%.

[1]  L. Hart-Smith,et al.  Designing to Minimize Peel Stresses in Adhesive-Bonded Joints , 1985 .

[2]  Jin-Hwe Kweon,et al.  Failure Load Prediction of Composite Joints using Linear Analysis , 2007 .

[3]  P. K. Mallick,et al.  Fatigue of hybrid (adhesive/bolted) joints in SRIM composites , 2001 .

[4]  Pearl Lee-Sullivan,et al.  Stiffness behaviour due to fracture in adhesively bonded composite-to-aluminum joints II. Experimental ☆ , 2000 .

[5]  Tomas Ireman,et al.  Three-dimensional stress analysis of bolted single-lap composite joints , 1998 .

[6]  Dai Gil Lee,et al.  The Torque Transmission Capabilities of the Adhesively-Bonded Tubular Single Lap Joint and the Double Lap Joint , 1994 .

[7]  Richard A. Scott,et al.  Strength of Mechanically Fastened Composite Joints , 1982 .

[8]  Young-Jun Chun,et al.  Failure Load Prediction of Mechanically Fastened Composite Joints , 2003 .

[9]  Robert D. Adams,et al.  Stress Analysis of Adhesive Bonded Tubular Lap Joints , 1977 .

[10]  H. L. Groth,et al.  A method to predict fracture in an adhesively bonded joint , 1985 .

[11]  G. Kelly,et al.  LOAD TRANSFER IN HYBRID (BONDED/BOLTED) COMPOSITE SINGLE-LAP JOINTS , 2005 .

[12]  Liyong Tong,et al.  A damage zone model for the failure analysis of adhesively bonded joints , 1998 .

[13]  Dai Gil Lee,et al.  An Experimental Study of the Static Torque Capacity of the Adhesively-Bonded Tubular Single Lap Joint , 1996 .

[14]  J. Whitney,et al.  Stress Fracture Criteria for Laminated Composites Containing Stress Concentrations , 1974 .

[15]  Richard A. Scott,et al.  Failure of Composite Laminates Containing Pin Loaded Holes—Method of Solution , 1984 .

[16]  Jin-Hwe Kweon,et al.  Strength prediction of adhesive joints using the modified damage zone theory , 2008 .

[17]  Pearl Lee-Sullivan,et al.  Stiffness behaviour due to fracture in adhesively bonded composite-to-aluminum joints. I. Theoretical model , 2000 .

[18]  H. T. Corten,et al.  FRACTURE MECHANICS OF COMPOSITES , 1972 .

[19]  W. S. Johnson.  Delamination and Debonding of Materials , 1985 .

[20]  Chun-Gon Kim,et al.  Failure mode and strength of uni-directional composite single lap bonded joints with different bonding methods , 2006 .