A nondestructive technique for predicting the strength remaining in filament wound composites subjected to low-level impactA model for predicting the fracture strength of homogeneous materials is proposed. Impacted FWC samples were evaluated using ultrasonic testing and an X-ray dye penetration method. The ability of the model to measure fracture strength was also examined. The relation between attenuation and velocity measurements is studied. It is observed that the X-ray method is not useful for predicting fracture strength because the dye could not penetrate the matrix. It is noted that fracture strength predictions derived from the fracture mechanical model and the ultrasonic measurements correlate well with actual measured fracture strengths.
Document ID
19870043824
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Madaras, E. I. (NASA Langley Research Center Hampton, VA, United States)
Poe, C. C. (NASA Langley Research Center Hampton, VA, United States)
Heyman, J. S. (NASA Langley Research Center Hampton, VA, United States)