التفاصيل البيبلوغرافية
| العنوان: |
不同缘条宽度复合材料C 型柱轴向压缩吸能特性. (Chinese) |
| Alternate Title: |
Energy-absorption characteristics of composite C-channels with different flange widths under axial compression. (English) |
| المؤلفون: |
牟浩蕾, 刘兴炎, 刘 冰, 解 江, 冯振宇 |
| المصدر: |
Journal of Aeronautical Materials; 2023, Vol. 43 Issue 6, p107-116, 10p |
| Abstract (English): |
Quasi-static axial compression experiments were conducted on the composite thin-walled C-channels with different flange widths. The axial compression failure modes and failure mechanisms were analyzed through CT scanning, and the effects of different flange widths on the axial compression energy-absorption characteristics of C-channels were evaluated by using the energyabsorption indexes. The single-layer shell model and multi-layer shell model of composite C-channel were established, and the finite element models were verified by comparing the failure modes, load-displacement curves and energy-absorption indexes. The results show that the flange width has a significant effect on the axial compression failure modes and energy-absorption characteristics of Cchannels. The C-channels with flange widths of 25 mm and 30 mm are failed in the stable and asymptotic manner under the axial compression loads and have good energy-absorption characteristics. The deviation of mean crushing force, energy absorption and specific energy absorption obtained by the multi-layer shell model is within 5%, while that obtained by the single-layer shell model is within 8%, which indicating that the multi-layer shell model of C-channel has the higher simulation accuracy. [ABSTRACT FROM AUTHOR] |
| Abstract (Chinese): |
针对不同缘条宽度的复合材料薄壁C 型柱开展准静态轴向压缩实验, 通过CT 扫描分析其轴向压缩失效模式 及破坏机理, 利用吸能特性评估参数分析不同缘条宽度对C 型柱轴向压缩吸能特性的影响。建立复合材料C 型柱 单层壳模型与多层壳模型, 通过对比轴向压缩仿真与实验获得的失效模式、载荷-位移曲线以及吸能特性评估参数, 来验证模型有效性。结果表明：缘条宽度对C 型柱轴向压缩失效模式和吸能特性的影响较大, 缘条宽度为 25 mm 和30 mm 的C 型柱在轴向压缩载荷作用下能够以稳态渐进的形式发生失效, 且吸能特性较好;C 型柱多层 壳模型仿真获得的平均压缩载荷、总吸能及比吸能偏差在5% 以内, 单层壳模型仿真获得的平均压缩载荷、总吸能 及比吸能偏差在8% 以内, 多层壳模型轴向压缩仿真精度更高。 [ABSTRACT FROM AUTHOR] |
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| قاعدة البيانات: |
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