Comparison of Solution Methods for Composite Material Beam Response Due to Impact.
Final contract rept. Jul 74-Jun 75,
DREXEL UNIV PHILADELPHIA PA
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Several solution methods are compared as to their usefulness in treating impact problems. The problem used as a basis for comparison involves a simply supported beam impacted at mid-span by a mass. The early-time and late-time structural responses of the system have been computed by 1 an analytical solution, 2 the NASTRAN finite-element, structural-analysis computer program, using both the direct integration method and the modal analysis method, and 3 the method of characteristics. The results have been compared. The chief conclusions are that the method of characteristics is the most accurate method for early-time, and that the NASTRAN modal method is best suited for late-time structural response.
- Laminates and Composite Materials
- Structural Engineering and Building Technology