Physical, Chemical, and Mechanical Bonding Concept/Mechanisms for Joining Steel and Composite Sections
Abstract
Silane-based chemistries on stainless steel substrates have been investigated to develop reliable stainless steel/E-glass composite sections. A chemistry has been uncovered that leads to a joint stronger than one of the substrate (composite). Effects of moisture and seawater on the fracture energies of the joints were also determined. Silane layers have been found that control the fracture path through the multilayer joint assembly in a way that improves the long-term fracture reliability by a factor of 5 over regular non-silane joint chemistries. The degrading effect of seawater was dramatic and the use of silane was not as effective as that against moisture attack. The intrinsic fracture energy of the joint was also measured by carrying out experiments at cryogenic temperatures, which can be used as a local failure criterion in design simulations of large structures. The intrinsic-to-total toughness relationship was experimentally obtained for the steel/composite joint, which provides the necessary scaling law for designing joints in large-scale structures based on the lab data. The dynamic tensile strengths of various interfaces in the joint were also measured.
Document Details
- Document Type
- Technical Report
- Publication Date
- Apr 22, 2004
- Accession Number
- ADA423133
Entities
People
- Vijay Gupta
Organizations
- University of California, Los Angeles