| 摘要: |
| 压缩性能是飞机中央翼用“T”长桁上壁板的重要指标。为验证有限元分析方法模拟“T”形长桁压缩破坏过程的合理性,本文选取单根“T”形长桁作为试验件,并根据铺层和尺寸的不同将试验件分为4种。运用工程算法计算了长桁的局部屈曲载荷、压损载荷；用有限元算法计算了长桁的屈曲载荷、压损载荷；通过试验获得长桁的局部屈曲载荷、屈曲载荷和压损载荷。比较分析上述3种方式得到的结果,可以发现:工程计算结果与试验结果误差偏大,误差达到8%~50%,且全部偏于保守；有限元计算结果与试验结果较接近,误差在10%以内；利用有限元模拟试验件的压缩破坏过程得到的载荷-位移曲线与试验结果比较一致。研究结果表明,有限元计算分析方法可实际工程应用,为设计人员提供设计依据。 |
| 关键词: 屈曲载荷 压损载荷 有限元 复合材料长桁 压缩 |
| DOI：10.11951/j.issn.1005-0299.20180276 |
| 分类号:V223+2 |
| 文献标识码:A |
| 基金项目: |
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| Study on compression performance of composite “T” stringer |
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TANG Ping
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(Shanghai Aircraft Design and Research Institute, Shanghai 201210, China) [HJ1.3mm]
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| Abstract: |
| Compression performance is an important index of the T-shaped stringer upper panel for the central wing of the aircraft. In order to verify the rationality of the finite element analysis method to simulate the compression failure process of the "T" shaped stringer, this paper selects a single "T" shaped stringer as the test piece, and divides the test piece into 4 types according to the different layers and sizes. The local buckling load and pressure loss load of long stringer are calculated by engineering algorithm; the buckling load and pressure loss load of long stringer are calculated by finite element algorithm; the local buckling load, buckling load and pressure loss load of long stringer are obtained by experiment. By comparing and analyzing the results of the above three methods, it can be found that: the error between the engineering calculation results and the test results is large, the error is 8%~50%, and all of them are conservative; the finite element calculation results are close to the test results, the error is within 10%; the load displacement curve obtained by using the finite element simulation of the compression failure process of the test piece is consistent with the test results. The results show that the finite element analysis method can be applied in practical engineering and provide basis for designers. |
| Key words: buckling load compression loss load finite element composite stringers compress |
