Theoretical Analysis of Impact in Composite Plates.
Abstract
The calculated stresses and displacements induced in anisotropic plates by short duration impact forces are presented in this report. The theoretical model attempts to model the response of fiber composite turbine fan blades to impact by foreign objects such as stones and hail-stones. In this model the determination of the impact force uses the Hertz impact theory. The plate response treats the laminated blade as an equivalent anisotropic material using a form of Mindlin's theory for crystal plates. The analysis makes use of a computational tool called the 'fast Fourier transform'. Results are presented in the form of stress contour plots in the plane of the plate for various times after impact. Examination of the maximum stresses due to impact versus ply layup angle reveals that the + or - 15 deg layup angle gives lower flexural stresses than 0 deg, + or - 30 deg and + or - 45 deg cases. (MM)
Document Details
- Document Type
- Technical Report
- Publication Date
- Jan 01, 1972
- Accession Number
- ADA306242
Entities
People
- F. C. Moon
Organizations
- Princeton University