涂层织物类膜材简化桁架模型研究
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摘要
在单胞模型的基础上,提出了一种用于预测涂层织物类膜材料力学性能的简化桁架模型。根据组分材料拉伸试验数据,选取以真应变为变量的四次多项式描述纤维束拉伸非线性行为,采用理想弹塑性模型反映涂层的力学响应,并结合扫描电镜试验获取膜材的细观结构尺寸参数。通过ABAQUS有限元软件及UMAT子程序实现上述模型,对膜材的拉伸性能进行预测。结果表明:整体预测结果较好,最大误差约为20%。形成误差的主要原因是纤维束间及纤维束与涂层间的接触非线性不能在模型中得到体现。
Based on the unit cell model,a simplified truss model for predicting the mechanical properties of coated fabric membrane materials was proposed. According to the tensile test data of the component materials,the fourth-order polynomial with true strain as the variable is selected to describe the nonlinear behavior of the fiber bundle,the mechanical response of the coating is reflected by the ideal elastoplastic model,the microstructure and the structure size parameter of the film is obtained by scanning electron microscopy. The above model was realized by ABAQUS finite element software and UMAT subroutine to predict the tensile properties of the film. The results show that the overall prediction results are good,and the maximum error is about 20%. The main reason for the error is that the nonlinearity of the contact between the fiber bundles and between the fiber bundle and the coating cannot be reflected in the model.
Based on the unit cell model,a simplified truss model for predicting the mechanical properties of coated fabric membrane materials was proposed. According to the tensile test data of the component materials,the fourth-order polynomial with true strain as the variable is selected to describe the nonlinear behavior of the fiber bundle,the mechanical response of the coating is reflected by the ideal elastoplastic model,the microstructure and the structure size parameter of the film is obtained by scanning electron microscopy. The above model was realized by ABAQUS finite element software and UMAT subroutine to predict the tensile properties of the film. The results show that the overall prediction results are good,and the maximum error is about 20%. The main reason for the error is that the nonlinearity of the contact between the fiber bundles and between the fiber bundle and the coating cannot be reflected in the model.
引文
[1]张营营,张其林.涂层织物类建筑膜材料的力学性能[M].北京:中国矿业大学出版社,2013.
[2]Forster B,Mollaert M. European design guide for tensile surface structures[M]. Brussel:Tensinet,2004.
[3]李阳,张其林.建筑膜材性能及试验研究现状[J].玻璃钢/复合材料,2006(2):53-56.
[4]Zhang Yingying,Xu Junhao,Zhang Qilin. Advances in mechanical properties of coated fabrics in civil engineering[J]. Journal of Industrial Textiles,2018,48(1):255-271.
[5]张营营,许珊珊,徐俊豪,等.聚四氟乙烯膜材黏弹性本构关系[J].建筑结构学报,2016,37(6):245-252.
[6]高成军,陈务军,邱振宇,等.建筑织物膜材双轴剪切试验与分析[J].实验力学,2016,31(1):25-30.
[7]倪静,罗仁安,陈有亮,等.建筑膜材料在双轴拉伸作用下的特性[J].工程力学,2009,26(6):100-104.
[8]赵飞龙,陈务军,何艳丽,等. PVDF涂层织物膜材和节点高温力学性能试验研究[J].空间结构,2014,20(3):42-47.
[9]Fang G D,Liang J,Yu W,et al. The effect of yarn distortion on the mechanical properties of 3D four-directional braided composites[J].Composites Part A:Applied Science&Manufacturing,2009,40(4):343-350.
[10]庞宝君,杜善义,韩杰才,等.三维多向编织复合材料非线性本构行为的细观数值模拟[J].复合材料学报,2000,17(1):98-102.
[11]张超,许希武,毛春见.三维编织复合材料渐进损伤模拟及强度预测[J].复合材料学报,2011,28(2):222-230.
[12]卢子兴,徐强,王伯平,等.含缺陷平纹机织复合材料拉伸力学行为数值模拟[J].复合材料学报,2011,28(6):200-207.
[13]Dinh T D,Rezaei A,Daelemans L,et al. A hybrid micro-mesoscale unit cell model for homogenization of the nonlinear orthotropic material behavior of coated fabrics used in tensioned membrane structures[J]. Composite Structures,2017,162:271-279.
[14]涤纶工业长丝:GB/T 16604—2008[S].北京:中国标准出版社,2008.
[15]膜结构检测技术规程:DG/T J08-2019-2007[S].上海:2007.
[16]膜结构设计规程:CECS 158∶2015[S].北京:中国计划出版社,2015.
[2]Forster B,Mollaert M. European design guide for tensile surface structures[M]. Brussel:Tensinet,2004.
[3]李阳,张其林.建筑膜材性能及试验研究现状[J].玻璃钢/复合材料,2006(2):53-56.
[4]Zhang Yingying,Xu Junhao,Zhang Qilin. Advances in mechanical properties of coated fabrics in civil engineering[J]. Journal of Industrial Textiles,2018,48(1):255-271.
[5]张营营,许珊珊,徐俊豪,等.聚四氟乙烯膜材黏弹性本构关系[J].建筑结构学报,2016,37(6):245-252.
[6]高成军,陈务军,邱振宇,等.建筑织物膜材双轴剪切试验与分析[J].实验力学,2016,31(1):25-30.
[7]倪静,罗仁安,陈有亮,等.建筑膜材料在双轴拉伸作用下的特性[J].工程力学,2009,26(6):100-104.
[8]赵飞龙,陈务军,何艳丽,等. PVDF涂层织物膜材和节点高温力学性能试验研究[J].空间结构,2014,20(3):42-47.
[9]Fang G D,Liang J,Yu W,et al. The effect of yarn distortion on the mechanical properties of 3D four-directional braided composites[J].Composites Part A:Applied Science&Manufacturing,2009,40(4):343-350.
[10]庞宝君,杜善义,韩杰才,等.三维多向编织复合材料非线性本构行为的细观数值模拟[J].复合材料学报,2000,17(1):98-102.
[11]张超,许希武,毛春见.三维编织复合材料渐进损伤模拟及强度预测[J].复合材料学报,2011,28(2):222-230.
[12]卢子兴,徐强,王伯平,等.含缺陷平纹机织复合材料拉伸力学行为数值模拟[J].复合材料学报,2011,28(6):200-207.
[13]Dinh T D,Rezaei A,Daelemans L,et al. A hybrid micro-mesoscale unit cell model for homogenization of the nonlinear orthotropic material behavior of coated fabrics used in tensioned membrane structures[J]. Composite Structures,2017,162:271-279.
[14]涤纶工业长丝:GB/T 16604—2008[S].北京:中国标准出版社,2008.
[15]膜结构检测技术规程:DG/T J08-2019-2007[S].上海:2007.
[16]膜结构设计规程:CECS 158∶2015[S].北京:中国计划出版社,2015.