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Improved Performance of Filament-Wound Composite Drive Shafts

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Improved Performance of Filament-Wound Composite Drive Shafts with Next Generation Inorganic Nanoparticle-Filled Epoxy Resins

 

Previous work explored the impact of high matrix modulus on the design and performance of filament wound drive shafts [1-3]. In that research high modulus was accomplished by incorporating high loadings of surface-functionalized nanoscale silica particles into a lowviscosity epoxy winding formulation. Increased lamina transverse and shear stiffness were shown by calculation and experiment to translate into increased shaft longitudinal and hoop stiffness for a fixed winding pattern and fiber content. The resulting increase in shaft torsional strength governed by torsional buckling was demonstrated. Design equations were exercised to demonstrate the impact on optimization of composite shaft design. In the present study next generation inorganic nanoparticle-filled epoxy matrix resin is shown to improve the strength of filament-wound composite drive shafts. High loadings of surfacefunctionalized nanoscale calcite particles are employed. First, neat resin properties for this technology are reported in order to demonstrate the range and balance of properties that are achievable. Important composite matrix resin mechanical properties including modulus and fracture toughness showed significant, generally monotonic improvement with increasing nanoparticle concentration. Desirable changes in coefficient of thermal expansion, cure exotherm, and hardness were also measured. Then the effect of increased matrix stiffness on shaft strength is demonstrated using sub-scale (ca. 25 mm diameter) [±40]2S shafts as well as full-scale (ca. 74 mm diameter) shafts with a [±30/±30/±10/±10/±75] winding pattern. These data confirm that the new material technology can significantly improve the performance of composite structures where transverse and shear stiffness are important.

 

Authors: Ambuj Sharma, James Nelson, Wendy Thompson, Douglas Goetz, Jesse Mack, Brett Beiermann, Amit Patel, Jay Lomeda, Paul Sedgwick, Travis Gorsuch, Dave Knauff, Scott Neubauer

 

Conference: CAMX 2016 – Anaheim

 

SKU/Code: TP16-0136

 

Pages: 14


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