Accession Number : ADA098683


Title :   Stress Analysis of Composites.


Descriptive Note : Final rept. Aug 79-Aug 80,


Corporate Author : ILLINOIS UNIV AT CHICAGO CIRCLE DEPT OF MATERIALS ENGINEERING


Personal Author(s) : Spilker,R L ; Ting,T C T


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/a098683.pdf


Report Date : Jan 1981


Pagination or Media Count : 244


Abstract : In the static analysis, the hybrid-stress finite element model is used for (1) the study of edge effects in symmetrically-stacked laminates subject to prescribed inplane strain, (2) the development and evaluation of 8-node single-layer plate bending elements for which the traction-free conditions are satisfied along a straight edge, and (3) the elastic-plastic analysis of single layer plates. An analytic study is also presented to determine the nature of the potential 2-D singularity at the intersection of a bimaterial interface and a free edge. In the dynamic analysis, the stress response in a laminated composite due to a unit step load applied at the boundary is obtained for points which are (a) at a finite distance, and (b) at a large distance, from the impact end. For the case (a), the composite may consist of a finite number of layers. (Author)


Descriptors :   *STRESS ANALYSIS , *LAMINATES , *FIBER REINFORCED COMPOSITES , COMPOSITE MATERIALS , EDGES , FINITE ELEMENT ANALYSIS , VISCOELASTICITY , ELASTIC PROPERTIES , COMPOSITE STRUCTURES , WAVE PROPAGATION , PLATES , PLASTIC PROPERTIES , NONLINEAR ANALYSIS


Subject Categories : Laminates and Composite Materials
      Mechanics


Distribution Statement : APPROVED FOR PUBLIC RELEASE