Accession Number : ADA089985


Title :   Finite Element Analysis of a Dynamically Loaded Flat Laminated Plate


Descriptive Note : Final rept. Nov 1976-Mar 1979


Corporate Author : ILLINOIS UNIV AT URBANA DEPT OF AEROSPACE ENGINEERING


Personal Author(s) : Zak, Adam R ; Pillasch, Daniel W


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/a089985.pdf


Report Date : Jul 1980


Pagination or Media Count : 123


Abstract : A finite element structural model has been developed for the dynamic analysis of laminated, thick plates. The model uses quadrilateral elements to represent the shape of the plate and the elements are stacked in the thickness direction to represent various material layers. This analysis allows for orthotropic, elastic-plastic or elastic-viscoplastic material properties. Non-linear strain displacement relations are used to represent large transverse plate deflections. A finite difference technique is used to perform the numerical time integration. Assumptions are made about the response through the thickness of the plate that allows for the use of relatively large time increments in the numerical integration method. These led to a set of element equilibrium equations which help to keep small error from affecting the values of stress that are calculated. The results from the analytical model are compared with experimental results. A good agreement is found between the calculated and measured values of the transverse plate deflections.


Descriptors :   *DYNAMIC RESPONSE , *FINITE ELEMENT ANALYSIS , *LAMINATES , *PLATES , ANISOTROPY , COMPUTER PROGRAMS , COMPUTERIZED SIMULATION , DEFLECTION , DISPLACEMENT , DYNAMIC LOADS , ELASTIC PROPERTIES , EQUATIONS , EQUILIBRIUM(GENERAL) , FINITE DIFFERENCE THEORY , MATHEMATICAL MODELS , NUMERICAL INTEGRATION , PLASTIC DEFORMATION , PLASTIC PROPERTIES , STRESS STRAIN RELATIONS , THICKNESS , TIME , TRANSVERSE , VISCOELASTICITY , YIELD


Subject Categories : Plastics
      Numerical Mathematics
      Mechanics


Distribution Statement : APPROVED FOR PUBLIC RELEASE