NASA Technical Memorandum NASA TM - 108399 /53 PRELIMINARY ANALYSIS TECHNIQUES FOR RING AND STRINGER STIFFENED CYLINDRICAL SHELLS By J. Graham Preliminary Design Office Program Development March 1993 (NASA-TM-I08399) PRELIMINARY ANALYSIS TECHNIQUES FOR RING AND STRINGER STIFFENED CYLINDRICAL SHELLS (NASA) 104 p N93-23104 Unclas G3/39 0153696 I / .SA National Aeronautics and Space Administration George C. Marshall Space Flight Center MSFC- Form 3190 (Rev. May 1983)