Nomex蜂窝芯静态压缩屈曲与后屈曲分析
|
摘要
基于自动铺丝工艺,为获得良好的蜂窝夹层结构自动铺放成型质量,建立了Nomex蜂窝芯在压辊压力下的屈曲、后屈曲和破坏整个失效过程的数值分析方法。采用线性屈曲分析法(特征值分析法)对蜂窝单元进行屈曲分析,得到一阶屈曲模态、屈曲特征值及屈曲载荷;引入初始结构几何缺陷,采用非线性屈曲分析法(弧长法)对Nomex蜂窝单元后屈曲行为进行分析,输出参考点RP-1的载荷-位移曲线,得到弧长法计算的屈曲载荷以及极限载荷值。通过对比试验结果与两种屈曲分析法得到:对于分析临界屈曲载荷,特征值法较弧长法更精确;而弧长法可以更好模拟结构的后屈曲行为,计算结果与试验数据基本吻合,为Nomex蜂窝夹心结构自动铺放成型过程中铺放压力的选取提供参考。
In order to obtain a good honeycomb sandwich structure automatic placement quality,based on the automated fiber placement a numerical method for buckling,post-buckling and failure of Nomex honeycomb cores under compression load are established. The linear buckling method(eigenvalue method)is used to analyze buckling of honeycomb cell and the first-order buckling mode,the buckling eigenvalue and load are obtained. The initial geometrical defects are introduced,and non-linear buckling method(arc length method) is used to analyze the post-buckling behavior of Nomex honeycomb cell. According to the load-displacement curve of RP-1,the buckling load and the limit load of the arc length method are obtained. Contrasting the data of the finite element bucking analysis and experiment,some conclusions can be obtained:The eigenvalue method is more accurate than the arc length method in buckling analysis,but the arc length method can simulate post-buckling behavior better. The calculated results are basically consistent with the experimental data. A reference is provided for selecting the placement pressure in the process of automatic placement of Nomex honeycomb sandwich structure.
In order to obtain a good honeycomb sandwich structure automatic placement quality,based on the automated fiber placement a numerical method for buckling,post-buckling and failure of Nomex honeycomb cores under compression load are established. The linear buckling method(eigenvalue method)is used to analyze buckling of honeycomb cell and the first-order buckling mode,the buckling eigenvalue and load are obtained. The initial geometrical defects are introduced,and non-linear buckling method(arc length method) is used to analyze the post-buckling behavior of Nomex honeycomb cell. According to the load-displacement curve of RP-1,the buckling load and the limit load of the arc length method are obtained. Contrasting the data of the finite element bucking analysis and experiment,some conclusions can be obtained:The eigenvalue method is more accurate than the arc length method in buckling analysis,but the arc length method can simulate post-buckling behavior better. The calculated results are basically consistent with the experimental data. A reference is provided for selecting the placement pressure in the process of automatic placement of Nomex honeycomb sandwich structure.
引文
[1] WILDEN K S,HARRIS C G,FLYNN B W,et al.Advanced technology composite fuselage-manufac-turing[R]. Hampton:NASA Langley Research Center,1997.
[2]肖军,李勇,文立伟,等.树脂基复合材料自动铺放技术进展[J].中国材料进展,2009,28(6):28-32.XIAO Jun,LI Yong,WEN Liwei,et al. Progress of automated placement technology for polymer compos-ites[J]. Materials China,2009,28(6):28-32.
[3]原崇新,汲生成,赵新福,等.蜂窝夹层结构自动铺丝工艺试验研究与优化[J].航空制造技术,2017,60(23):74-78.YUAN Chongxin,JI Shengcheng,ZHAO Xinfu,et al. Experimental study and optimization of automated fiber placement for honeycomb sandwich structures[J]. Aeronautical Manufacturing Technology,2017,60(23):74-78.
[4]王冬梅.蜂窝纸板压缩破坏机理研究[J].包装工程,2006,27(1):37-39,63.WANG Dongmei. Compression breakage properties research on the honeycomb fibreboard[J]. Packaging Engineering,2006,27(1):37-39,63.
[5]梁秀,王玉龙,丁辉.蜂窝纸芯静态压缩性能有限元分析[J].包装工程,2015(19):59-63.LIANG Xiu,WANG Yulong,DING Hui. Finite ele-ment analysis of static compression performance of honeycomb paper-core[J]. Packaging Engineering,2015(19):59-63.
[6]梁森,陈花玲,梁天锡.蜂窝夹芯胞元壳的屈曲特性研究[J].机械工程学报,2004,40(12):90-95.LIANG Sen,CHEN Hualing,LIANG Tianxi. Buck-ling properties of honeycomb core cell shells[J]. Me-chanical Engineering,2004,40(12):90-95.
[7] SEEMANN R,KRAUSE D. Numerical modeling of Nomex honeycomb sandwich cores at meso-scale level[J]. Composite Structures,2016,159(1):702-718.
[8]孙德强,孙玉瑾,郑波波,等.六边形蜂窝芯异面类静态压缩力学行为的仿真分析[J].包装工程,2014(1):18-22.SUN Deqiang,SUN Yujin,ZHENG Bobo,et al.Simulation analysis of the out-of-plane quasi-static compression of hexagonal honeycomb cores[J]. Pack-aging Engineering,2014(1):18-22.
[9]江丙云,孔祥宏,罗元元,等. ABAQUS工程实例详解[M].北京:人民邮电出版社,2014.
[10] LIU L,MENG P,WANG H,et al. The flatwise compressive properties of Nomex honeycomb core with debonding imperfections in the double cell wall[J]. Composites Part B,2015,76:122-132.
[11] LIU L, WANG H, GUAN Z. Experimental and numerical study on the mechanical response of Nomex honeycomb core under transverse loading[J].Composite Structures,2015,121:304-314.
[12] ASPRONE D,AURICCHIO F,MENNA C,et al.Statistical finite element analysis of the buckling behavior of honeycomb structures[J]. Composite Structures,2013,105(8):240-255.
[2]肖军,李勇,文立伟,等.树脂基复合材料自动铺放技术进展[J].中国材料进展,2009,28(6):28-32.XIAO Jun,LI Yong,WEN Liwei,et al. Progress of automated placement technology for polymer compos-ites[J]. Materials China,2009,28(6):28-32.
[3]原崇新,汲生成,赵新福,等.蜂窝夹层结构自动铺丝工艺试验研究与优化[J].航空制造技术,2017,60(23):74-78.YUAN Chongxin,JI Shengcheng,ZHAO Xinfu,et al. Experimental study and optimization of automated fiber placement for honeycomb sandwich structures[J]. Aeronautical Manufacturing Technology,2017,60(23):74-78.
[4]王冬梅.蜂窝纸板压缩破坏机理研究[J].包装工程,2006,27(1):37-39,63.WANG Dongmei. Compression breakage properties research on the honeycomb fibreboard[J]. Packaging Engineering,2006,27(1):37-39,63.
[5]梁秀,王玉龙,丁辉.蜂窝纸芯静态压缩性能有限元分析[J].包装工程,2015(19):59-63.LIANG Xiu,WANG Yulong,DING Hui. Finite ele-ment analysis of static compression performance of honeycomb paper-core[J]. Packaging Engineering,2015(19):59-63.
[6]梁森,陈花玲,梁天锡.蜂窝夹芯胞元壳的屈曲特性研究[J].机械工程学报,2004,40(12):90-95.LIANG Sen,CHEN Hualing,LIANG Tianxi. Buck-ling properties of honeycomb core cell shells[J]. Me-chanical Engineering,2004,40(12):90-95.
[7] SEEMANN R,KRAUSE D. Numerical modeling of Nomex honeycomb sandwich cores at meso-scale level[J]. Composite Structures,2016,159(1):702-718.
[8]孙德强,孙玉瑾,郑波波,等.六边形蜂窝芯异面类静态压缩力学行为的仿真分析[J].包装工程,2014(1):18-22.SUN Deqiang,SUN Yujin,ZHENG Bobo,et al.Simulation analysis of the out-of-plane quasi-static compression of hexagonal honeycomb cores[J]. Pack-aging Engineering,2014(1):18-22.
[9]江丙云,孔祥宏,罗元元,等. ABAQUS工程实例详解[M].北京:人民邮电出版社,2014.
[10] LIU L,MENG P,WANG H,et al. The flatwise compressive properties of Nomex honeycomb core with debonding imperfections in the double cell wall[J]. Composites Part B,2015,76:122-132.
[11] LIU L, WANG H, GUAN Z. Experimental and numerical study on the mechanical response of Nomex honeycomb core under transverse loading[J].Composite Structures,2015,121:304-314.
[12] ASPRONE D,AURICCHIO F,MENNA C,et al.Statistical finite element analysis of the buckling behavior of honeycomb structures[J]. Composite Structures,2013,105(8):240-255.