Flexure and pressure-loading effects on the performance of structure–battery composite beams
| Autor: | James P. Thomas, Giang T Pham, Siddiq M. Qidwai, William R. Pogue |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
Battery (electricity)
Buoyancy Materials science Mechanical Engineering Hydrostatic pressure 02 engineering and technology engineering.material 021001 nanoscience & nanotechnology Composite beams 020303 mechanical engineering & transports 0203 mechanical engineering Mechanics of Materials Materials Chemistry Ceramics and Composites engineering Energy density Unmanned underwater vehicle Composite material 0210 nano-technology Beam (structure) |
| Zdroj: | Journal of Composite Materials. 53:2863-2874 |
| ISSN: | 1530-793X 0021-9983 |
| DOI: | 10.1177/0021998318810856 |
| Popis: | The effects of sustained three-point bend loading and hydrostatic pressure on the mechanical and energy-storage performance of three structure–battery beam prototypes were experimentally investigated. The SB beams, designed for unmanned underwater vehicle applications, were fabricated using marine-grade structural composite constituents and commercial rechargeable lithium-ion “pouch” cells. Low-temperature cure materials and multistep processing were used in fabrication to avoid exposing the cells to temperatures above 60℃. The results showed load relaxation (up to 6–18%) under constant displacement three-point bending within the elastic regime due to viscoelastic shear in adhesive bond layers between components and lamina. Concurrent cell charge–discharge during sustained load bending had a small effect on the load (∼1% change or less). Energy storage capacity under hydrostatic pressures up to 2 MPa, equivalent to 200 m ocean depth, showed a 6–8% decrease in capacity. The results highlighted the need for some design changes to improve structure–battery component performance including: exclusive use of high-temperature cure resins (epoxy or vinyl ester) to improve structural performance and enable single-step fabrication, and transverse (fiber) reinforcement to strengthen the interlayer bonds and embedded cell pockets to minimize load relaxation effects and maximize component bending strength. |
| Databáze: | OpenAIRE |
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