Finite Element-Based Parametric Investigations of the Stepped-Lap Repairs to Laminated Cylindrical Shell

Abstract:

A parametric finite element (FE) model was developed to allow a broad investigation into the influence of various parameters, such as load conditions, stacking sequence and the number of steps on the performance of the stepped-lap repairs in composite laminated cylindrical shells. And the peak stresses determined with respect to changes in stacking sequence and the number of steps. Furthermore, the adhesive stress distribution resulting from joining mismatched laminate cylindrical shells was investigated. The results of this investigation provide further insight into the stresses that develop in stepped repairs of composite structures under load. This insight may lead to improve design and analysis techniques of stepped repairs in composite structures.

• Periodical: Applied Mechanics and Materials (Volumes 90-93)
• Pages: 2682-2690
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.90-93.2682
• Online since: September 2011
• Authors: Jian Xin Xu, Lu Chun Zhao, Ding He Li
• Keywords: Composite, Finite Element Model (FEM), Laminated Cylindrical Shell, Stepped-Lap Repair, Stress Distribution

References

[1] Baker A. A. Bonded composite repair of fatigue-cracked primary aircraft structure. Composite structures, 1999, 47: 431-443.

DOI: 10.1016/s0263-8223(00)00011-8

[2] Baker A. A, Chester R. I, Hugo G. R, Radtke T. C. Scarf repairs to highly strained graphite/epoxy structure. International Journal Adhesion & Adhesive, 1999, 19: 161-171.

DOI: 10.1016/s0143-7496(98)00031-1

[3] Bartholomeusz R. A, Baker A. A, Chester R. I, Searl A. Bonded joints with through-thickness adhesive stresses reinforcing the F/A Y470.5 bulkhead. International Journal Adhesion & Adhesive, 1999,19: 173-180.

DOI: 10.1016/s0143-7496(98)00032-3

[4] Chalkley P, Baker A. A. Development of a generic repair joint for certification of bonded composite repairs. International Journal Adhesion & Adhesive, 1999, 19: 121-132.

DOI: 10.1016/s0143-7496(98)90028-8

[5] Barut A, Hanauska J, Madenci E, Ambur D. R. Analysis method for bonded patch repair of a skin with a cutout. Composite structures, 2002, 55: 277-294.

DOI: 10.1016/s0263-8223(01)00158-1

[6] Goland M, Reissner E. The stresses in cemented joints. Journal Applied Mechanic, 1944, 11: A17-27.

DOI: 10.1115/1.4009336

[7] Hart-Smith L J. Design methodology for bonded-bolted composite joints. Analysis derivations and illustrative solutions. Technology Report AFWAL-TR-81-3154, February, 1982. Vol. 1.

[8] Oplinger D. Effects of adherend deflections in single lap joints. International Solids and Structures, 1994, 1: 2565-2587.

DOI: 10.1016/0020-7683(94)90037-x

[9] Tsai M Y, Morton J. An evaluation of analytical and numerical solutions to the single-lap joint. International Solids and Structures, 1994, 31: 2537-2563.

DOI: 10.1016/0020-7683(94)90036-1

[10] Bagdonavich A E, Kizhakkethara I. Three dimensional finite element analysis of double-lap composite adhesive bonded joint using sub-modeling approach. Composite B, 1999, 30: 537-51.

DOI: 10.1016/s1359-8368(99)00026-8

[11] Sun C T, Klug J, Arendt C. Analysis of cracked aluminum plates repaired with bonded composite patches. AIAA Journal, 1996, 34: 369-374.

DOI: 10.2514/3.13073

[12] Naboulis S, Mall S. Modeling of a cracked metallic structure with bonded composite patch using the three layer technique. Composite Structures, 1996, 35: 295-308.

DOI: 10.1016/0263-8223(96)00043-8

[13] Naboulis S, Mall S. Nonlinear analysis of bonded composite patch repair of cracked aluminum panels. Composite Structures, 1998, 41: 303-313.

DOI: 10.1016/s0263-8223(98)00052-x

[14] Andrew J. G, Israel H. Parametric study of scarf joints in composite structures. Composite Structures, 2006, 75:364-376.

DOI: 10.1016/j.compstruct.2006.04.053

[15] Kaye R., Heller M. Finite element-based three-dimensional stress analysis of composite bonded repairs to metallic aircraft structure. International Journal of Adhesion & Adhesives, 2006, 26: 261-273.

DOI: 10.1016/j.ijadhadh.2005.03.016

[16] Alex B. Harman, Chun H. Wang. Improved design methods for scarf repairs to highly strained composite aircraft structure. Composite Structures, 2006, 75: 132-144.

DOI: 10.1016/j.compstruct.2006.04.091

[17] Liyong Tong, Xiannian Sun. Nonlinear stress analysis for bonded patch to curved thin-walled structures. International Journal of Adhesion & Adhesives , 2003, 23: 349-364.

DOI: 10.1016/s0143-7496(03)00063-0

[18] Hart-Smith LJ. Adhesive-bonded scarf and stepped-lap joints. Hampton, VA. Langley Research Center, 1973. NASA CR 112237.

[19] Zou GP, Shahin K, Taheri F. An analytical solution for the analysis of symmetric composite adhesively bonded joints. Composite Structure, 2004, 65: 499-510.

DOI: 10.1016/j.compstruct.2004.01.007

[20] Fredrickson B, Mollenhauer D H, Schoeppner G A, Palazotto A N. Measurement and prediction of strain fields in composite scarf and step-lap joints. In: Proceedings of the American society for composites 21st technical conference, University of Michigan-Dearborn, Dearborn, Michigan, Paper number 59, 17-20 September , 2006.

[21] Mollenhauer D H, Fredrickson B M, Schoeppner G A, Palazotto A N. Moiré interferometry easurements of composite laminate repair behavior. Influence of grating thickness on interlaminar response. Composites. Part A, 2008, 39: 1322-1330

DOI: 10.1016/j.compositesa.2008.02.015