Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
8058542 | Aerospace Science and Technology | 2016 | 18 Pages |
Abstract
This paper presents an approach to simulate the high strain-rate compression of 3-D braided basalt/epoxy composite materials under room and low temperatures. A microstructure model of 3-D braided composite was established to characterize a fully coupled thermo-mechanical response during the fast deformation. High stress state and low heat generation have been found in braided reinforcement. For out-of-plane compression, adiabatic heat concentration is along single diagonal direction at â100â°C, while a cross-shape heat concentration region is found along two crossed diagonal directions at 26â°C. There are fewer cracks among fiber tows at low temperature. Once the single diagonal shear failure occurs at low temperature, the 3-D braided reinforcement can not keep structure integrity and will be separated into two parts. For in-plane compression, the damage morphology at â100â°C is similar to that at 26â°C. Under the influence from the fiber tows, the adiabatic heating develops the zigzag-shape damage with veins and stripes along the braiding angle in composite, while the 3-D braided reinforcement still keeps its structural integrity.
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Physical Sciences and Engineering
Engineering
Aerospace Engineering
Authors
Zhongxiang Pan, Baozhong Sun, Bohong Gu,