Structural Durability of Damaged Metallic Panel Repaired with Composite Patches

Abstract

Structural durability/damage tolerance characteristics of an aluminum tension specimen possessing a short crack and repaired by applying a fiber composite surface patch is investigated via computational simulation. The composite patch is made of graphite/epoxy plies with various layups. An integrated computer code that accounts for all possible failure modes is utilized for the simulation of combined fiber-composite/ aluminum structural degradation under loading. Damage initiation, growth, accumulation, and propagation to structural fracture are included in the simulation. Results show the structural degradation stages due to tensile loading and illustrate the use of computational simulation for the investigation of a composite patch repaired cracked metallic panel.

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References

1. Chamis, C. C. , and G. T. Smith . 1978. "Composite Durability Structural Analysis" NASA TM-79070.

2. Murthy, P. L. N. , and C. C. Chamis . 1986. Integrated Composite Analyzer (ICAN): Users and Programmers Manual, NASA Technical Paper 2515, March.

3. Nakazawa, S. , J. B. Dias , and M. S. Spiegel . 1987. MHOST Users' Manual, Prepared for NASA Lewis Research Center by MARC Analysis Research Corp., April.

4. Minnetyan, L. , C. C. Chamis , and P. L. N. Murthy . 1992. "Structural Behavior of Composites with Progressive Fracture" Journal of Reinforced Plastics and Composites, 11(4):413-442.

5. Minnetyan, L. , P. L. N. Murthy , and C. C. Chamis . 1990. "Composite Structure Global Fracture Toughness via Computational Simulation' Computers & Structures, 37(2):175-180. November.

6. Minnetyan, L. , P. L. N. Murthy , and C. C. Chamis . 1992. "Progressive Fracture in Composites Subjected to Hygrothermal Environment' International Journal of Damage Mechanics, 1(1):60-79.

7. Minnetyan, L. , C. C. Chamis , and P. L. N. Murthy . 1992. "Structural Durability of a Composite Pressure Vessel;" Journal of Reinforced Plastics and Composites, 11(11):1251-1269.

8. Minnetyan, L. , and C. C. Chamis . 1995. 1995. "Pressure Vessel Fracture Simulation;" Presented at the ASTM 25th National Symposium on Fracture Mechanics, Lehigh University, Bethlehem, Pennsylvania, June 28-July 1, 1993, Published in ASTM STP 1220, Fracture Mechanics: 25th Volume, August. pp. 671-684.

9. Minnetyan, L. , J. M. Rivers , C. C. Chamis , and P. L. N. Murthy . 1995. "Discontinuously Stiffened Composite Panel under Compressive Loading," Journal of Reinforced Plastics and Composites, 14(V):85-98.