Accession Number : ADA259026


Title :   The Non-Linear Dynamics of Composite Cylindrical Shells


Descriptive Note : Master's thesis,


Corporate Author : AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH SCHOOL OF ENGINEERING


Personal Author(s) : Greer, Jr, James M


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/a259026.pdf


Report Date : 15 Dec 1992


Pagination or Media Count : 108


Abstract : The non-linear dynamic behavior of suddenly loaded composite shells is the subject of this research. The objective of research is two-fold: (1) to characterize the apparently random physical behavior sometimes observed in the finite element analysis as either numerical instability, chaotic behavior, or both; and (2) to develop criteria for choosing time steps for the finite element model, referred to as DSHELL. This displacement based finite element code is capable of dynamic analysis of plates, arches, and cylindrical shells undergoing large displacements and moderately large rotations during deformation. DSHELL uses a 36-DOF isoparametric shell element to obtain numerical results. A simplified shell model (MSHELL) is developed to provide a shell analog that requires much less computer time to run than the full-up


Descriptors :   *DYNAMICS , *COMPOSITE STRUCTURES , *SHELLS(STRUCTURAL FORMS) , *NONLINEAR ANALYSIS , FREQUENCY , MODELS , CHAOS , PANELS , DEFORMATION , MECHANICS , INSTABILITY , FREQUENCY DOMAIN , ROTATION , STATICS , OSCILLATION , BEHAVIOR , FAST FOURIER TRANSFORMS , ANALOGS , PLATES , ARCHES , COLLAPSE , TIME , THESES , DISPLACEMENT , STRUCTURAL MECHANICS , FINITE ELEMENT ANALYSIS , EDGES , COMPUTERS


Subject Categories : Theoretical Mathematics
      Structural Engineering and Building Technology
      Mechanics


Distribution Statement : APPROVED FOR PUBLIC RELEASE