Spline Variational Theory for Composite Bolted Joints
Abstract
A hybrid approximation model for predicting stresses and strains in open-hole composites was developed. This model is based on combined asymptotic and spline approximation stress functions and spline approximation displacement functions which provide accurate stress fields in the vicinity of the ply interface and the hole edge in a multilayered composite laminate. This hybrid model, using spline variational theory and Reissner's variational principle, provides directionally nonunique stress approximation critical for singular stress regions, combining it with flexibility of displacement approximation to analyze practical structures. Experimental studies of damage initiation and propagation in the open-hole laminates for three stacking sequences were performed. Theoretical strains obtained from the spline variational theory agree well with experimental strain measurements at low loadings prior to damage initiation.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jan 01, 1998
- Accession Number
- ADA351476
Entities
People
- E. Iarve
- R. Y. Kim
Organizations
- University of Dayton