Accession Number : AD0750132


Title :   Development of an Understanding of the Fatigue Phenomena of Bonded and Bolted Joints in Advanced Filamentary Composite Materials. Volume 1. Analysis Methods


Descriptive Note : Final technical rept. Aug 1970-Apr 1972


Corporate Author : LOCKHEED-GEORGIA CO MARIETTA


Personal Author(s) : Dickson, John N ; Hsu, Teh-Min ; McKinney, James M


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/750132.pdf


Report Date : Jun 1972


Pagination or Media Count : 136


Abstract : The main body of this volume is divided into three chapters, as follows: Closed Form Analysis Methods; Finite Element Analyses; Photoelastic Stress Analysis. Emphasis was placed on the development of closed form analysis procedures for bonded joints in laminated composites. A COMPREHENSIVE LINEAR ANALYSIS METHOD AND ASSOCIATED COMPUTER PROGRAM (BONJO 1) has been developed. Numerical results obtained with this program are compared with finite element analyses, strain gage data, and photoelastic results. A 6Plastic Zone6 approach was used to extend BONJO 1 to include joints with ideally elastic-plastic adhesive stress-strain behavior. The theoretical development of a rigorous non- linear analysis procedure for bonded joints has been presented. However, this method was not carried beyond the exploratory stage. Finite element analyses used to evaluate the step lap bonded joints and bolted joints are presented and discussed. Photoelastic stress analysis procedures used in the program are described in the final chapter together with the results obtained.


Descriptors :   *COMPOSITE MATERIALS , *BONDED JOINTS , *BOLTED JOINTS , STRESSES , FATIGUE(MECHANICS) , JOINTS , PHOTOELASTICITY , LAMINATES , NUMERICAL ANALYSIS


Subject Categories : Laminates and Composite Materials
      Couplers, Fasteners, and Joints


Distribution Statement : APPROVED FOR PUBLIC RELEASE