Abstract
The aim of the present paper is to assess the bearing performance evolution of pinned, glass-composite laminates due to environmental aging in salt-spray fog tests. Glass fibers/epoxy pinned laminates were exposed for up to 60 days in salt-spraying, foggy environmental conditions (according to ASTM B117 standard). In order to evaluate the relationship between mechanical failure mode and joint stability over increasing aging time, different single lap joints, measured by the changing hole diameter (D), laminate width (W) and hole free edge distance (E), were characterized at varying aging steps. Based on this approach, the property-structure relationship of glass-fibers/epoxy laminates was assessed under these critical environmental conditions. Furthermore, an experimental 2D failure map, clustering main failure modes in the plane E/D versus W/D ratios, was generated, and its cluster variation was analyzed at each degree of aging.
Highlights
IntroductionIt is worth noting that, regardless of the engineering field, monolithic structures are extremely unusual or limited to very particular applications; i.e., composite components are frequently joined to other composite or metallic substrates through structural adhesives [1,2] or mechanical inserts, such as bolts, rivets and so on [3,4]
Since the middle of last century, traditional materials like steel or aluminum alloys have been partially replaced by composite materials in several industrial sectors, such as nautical, aeronautical and aerospace, mainly thanks to their low weight, high static and dynamic mechanical performances and good chemo-physical properties.It is worth noting that, regardless of the engineering field, monolithic structures are extremely unusual or limited to very particular applications; i.e., composite components are frequently joined to other composite or metallic substrates through structural adhesives [1,2] or mechanical inserts, such as bolts, rivets and so on [3,4].Structural adhesives, on the one hand, are recommended because the absence of holes avoids the occurrence of delamination phenomena within composite substrates
The product D ∗ s is indicated as bearing area where, roughly, the fastener interacts with composite laminate
Summary
It is worth noting that, regardless of the engineering field, monolithic structures are extremely unusual or limited to very particular applications; i.e., composite components are frequently joined to other composite or metallic substrates through structural adhesives [1,2] or mechanical inserts, such as bolts, rivets and so on [3,4]. Structural adhesives, on the one hand, are recommended because the absence of holes avoids the occurrence of delamination phenomena within composite substrates. The absence of inserts allows one to reduce the weight of a structure and prevents degradation phenomena caused by galvanic corrosion; this option does not facilitate structural disassembly (i.e., in case of maintenance and repair operations). Vice versa: mechanical joints are easy to disassemble and able to sustain higher loads in comparison to their adhesive counterparts.
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
