A Numerical Investigation of CFRP-Steel Interfacial Failure with Material Point Method

Journal Article · Fri May 21 00:00:00 EDT 2010 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.3452290· OSTI ID:21361990

Luming, Shen ^[1]; Faleh, Haydar; Al-Mahaidi, Riadh ^[2]

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1. School of Civil Engineering, University of Sydney, NSW 2006 (Australia)
2. Department of Civil Engineering, Monash University, Victoria 3800 (Australia)

The success of retrofitting steel structures by using the Carbon Fibre Reinforced Polymers (CFRP) significantly depends on the performance and integrity of CFRP-steel joint and the effectiveness of the adhesive used. Many of the previous numerical studies focused on the design and structural performance of the CFRP-steel system and neglected the mechanical responses of adhesive layer, which results in the lack of understanding in how the adhesive layer between the CFRP and steel performs during the loading and failure stages. Based on the recent observation on the failure of CFRP-steel bond in the double lap shear tests, a numerical approach is proposed in this study to simulate the delamination process of CFRP sheet from steel plate using the Material Point Method (MPM). In the proposed approach, an elastoplasticity model with a linear hardening and softening law is used to model the epoxy layer. The MPM, which does not employ fixed mesh-connectivity, is employed as a robust spatial discretization method to accommodate the multi-scale discontinuities involved in the CFRP-steel bond failure process. To demonstrate the potential of the proposed approach, a parametric study is conducted to investigate the effects of bond length and loading rates on the capacity and failure modes of CFRP-steel system. The evolution of the CFRP-steel bond failure and the distribution of stress and strain along bond length direction will be presented. The simulation results not only well match the available experimental data but also provide a better understanding on the physics behind the CFRP sheet delamination process.

• OSTI ID: 21361990
• Journal Information: AIP Conference Proceedings, Vol. 1233, Issue 1; Conference: 2. international symposium on computational mechanics; 12. international conference on the enhancement and promotion of computational methods in engineering and science, Hong Kong (Hong Kong); Hong Kong (Hong Kong), 30 Nov - 3 Dec 2009; 30 Nov - 3 Dec 2009; Other Information: DOI: 10.1063/1.3452290; (c) 2010 American Institute of Physics; ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ADHESIVES
BOND LENGTHS
CARBON FIBERS
COMPOSITE MATERIALS
EPOXIDES
FINITE ELEMENT METHOD
HARDENING
LAYERS
LOADING RATE
NUMERICAL ANALYSIS
PARAMETRIC ANALYSIS
POLYMERS
REINFORCED MATERIALS
RETROFITTING
SHEAR
SIMULATION
STEELS
STRAINS
STRESSES
ALLOYS
CALCULATION METHODS
CARBON ADDITIONS
DIMENSIONS
FIBERS
IRON ALLOYS
IRON BASE ALLOYS
LENGTH
MATERIALS
MATHEMATICAL SOLUTIONS
MATHEMATICS
NUMERICAL SOLUTION
ORGANIC COMPOUNDS
ORGANIC OXYGEN COMPOUNDS
TRANSITION ELEMENT ALLOYS