...DM Hoyt; SH Ward; PJ Minguet The aerospace industry lacks a validated, practical analysis method for the strength, durability, and damage tolerance evaluation of composite bonded joints. This paper presents the results of a combined strength and fracture analysis approach applied to typical bonded...

... exhibits greater ductilityat lower loading frequencies in laminates with and withoutthe interleaf. KEY WORDS: delamination, fatigue, frequency effects, interleaf, damage tolerance, durability, fractography Loading frequency was considered to have little effect on the fatigue life of metals. However, recent...

... with relatively large tear straps and crack tip damage growth. damage tolerance composite panels References Ilcewicz , L. B. , Smith , P. J. , Walker , T. H. , and Johnson , R. W. , “ Advanced Technology Fuselage Structure ,” First NASA Advanced Composite Technology Conference...

... panel configurations and compared with strain gage data. Reasonable comparisons between predictions and measurements are obtained. This paper lays the foundation for the predictions of the damage tolerance of stiffened composite panels that will be discussed further in a second paper. D. L. Graesser 1...

...K Srinivasan; TW Coats; JA Hinkley The multispan beam (MSB) test was evaluated as a predictor of damage resistance and damage tolerance in quasi-isotropic graphite laminates. Materials studied were five commercial prepreg systems using high-strain and intermediate-modulus carbon fibers, as well...

... cracking and improve damage tolerance of the sandwich. Simply supported sandwich beam specimens were subjected to low-velocity, drop-weight impacts as well as high-velocity, ballistic impacts. The performance of the interleaved core sandwich panels was characterized by localized skin damage and minor...

...: delamination, delamination resistance, composite structures, composite design, delamination growth, fatigue loads, interleaving, stitching, damage tolerance, durability Applications of composite materials to flight vehicles possess unique characteristics in structural design. For example, the directional...

.... and Ginty , C. A. , “ Composite Durability and Damage Tolerance: Simplified Predictive Methods ,” NASA Report TM-100179, National Aeronautics and Space Administration , Washington, DC, 1987 . Chamis , C. C. and Smith , G. T. , “ CODSTRAN: Composite Durability Structural Analysis ,” NASA...