泡沫夹层结构力学性能的非线性有限元分析
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摘要
泡沫夹层结构因其较高的比刚度及比强度,在各领域得到广泛应用。但由于泡沫在受力过程中呈现较强的非线性,且相对其它常用材料强度较小,需对泡沫进行材料的非线性分析,才能更准确地判断泡沫夹层结构在应用中所体现的力学性能。本文根据泡沫材料呈现的相关性能,定义了该材料的非线性本构关系,并利用MSC.Marc二次开发用户子程序接口将该本构关系写入,而且引入了针对泡沫材料的三参数广义强度准则,建立了泡沫材料的非线性有限元计算模型。通过铝面板泡沫夹层结构的平拉、平压、剪切实例分析并结合其它分析方法与实验结果进行比较,论证了该泡沫材料非线性有限元模型的准确性,同时证实了广义强度准则在泡沫材料上的适用性,为泡沫夹层结构研究与应用提供了依据。
Because of the high stiffness ratio and strength ratio,the foam cored sandwich is used extensively in many fields.But its nonlinear mechanical properties and relative small strength call for nonlinear analysis,so that the mechanical properties can be predicted better.Based on the provided mechanical property data of the given foam,the nonlinear constitute for this foam was defined by using a user subroutine of MSC.Marc secondary development,and the generalized failure criteria was also introduced to this model to form the nonlinear analysis model in FEM.An example of foam-cored sandwich aluminum panels was calculated.Through the comparison with the experimental and analytical results,it demonstrates the accuracy of this nonlinear material finite element model,and the generalized failure criteria's applicability in this foam is also confirmed.This method can be used for reference in the research and application of sandwich structure.
Because of the high stiffness ratio and strength ratio,the foam cored sandwich is used extensively in many fields.But its nonlinear mechanical properties and relative small strength call for nonlinear analysis,so that the mechanical properties can be predicted better.Based on the provided mechanical property data of the given foam,the nonlinear constitute for this foam was defined by using a user subroutine of MSC.Marc secondary development,and the generalized failure criteria was also introduced to this model to form the nonlinear analysis model in FEM.An example of foam-cored sandwich aluminum panels was calculated.Through the comparison with the experimental and analytical results,it demonstrates the accuracy of this nonlinear material finite element model,and the generalized failure criteria's applicability in this foam is also confirmed.This method can be used for reference in the research and application of sandwich structure.
引文
[1]Sokolinsky V S,Shen H B,Lev V,Steven R N.Experimental and analytical study of nonlinear bending response of sandwich beams[J].Composite Structure,2003,60:219-229.
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[3]Vadakke V,Carlsson L A.Experimental investigation of compression failure of sandwich specimens with face/core debond[J].Compos-ites Part B,2004,35:583-590.
[4]Cartie D D,Fleck N A.The effect of pin reinforcement upon the through-thickness compressive strength of foam-cored sandwich panels[J].Composites Science and Technology,2003,63:2401-2409.
[5]Kim J M.Design of sandwich beams for concentrated loading[D].Salt Lake City:University of Utah,2001.
[6]Stanley L E,Adans D O.Development and evaluation of stitched sandwich panels[R].NASA/CR-2001-211025,2001.
[7]杜善义,关志东.我国大型客机先进复合材料技术应对策略思考[J].复合材料学报,2008,25(1):1-10.
[8]郑锡涛,孙秦,李野,柴亚南,曹正华.全厚度缝合复合材料泡沫芯夹层结构力学性能研究与损伤容限评定[J].复合材料学报,2006,23(6):29-36.
[9]孙春方,薛元德,胡培.复合材料泡沫夹芯结构力学性能与试验方法[J].玻璃钢/复合材料,2005(2):3-6.
[10]孙春方,李文晓,薛元德,胡培.高速列车用PMI泡沫力学性能研究[J].玻璃钢/复合材料,2006(4):13-19.
[11]孙春方,薛元德,李文晓.铝面板PMI泡沫芯夹层材料力学性能研究[J].建筑材料学报,2007,10(3):364-368.
[12]卢子兴.复合泡沫塑料力学行为的研究综述[J].力学进展,2004,34(3):341-348.
[13]MSC.Marc User s Guide[S].MSC公司,2005.
[14]陈火红,尹伟奇,薛小香.MSC.Marc二次开发指南[M].北京:科学出版社,2003.
[15]刘浩平,张令心,石磊.基于MSC.Marc二次开发的土体静力和地震非线性分析方法[J].地震工程与工程振动,2008,28(3):178-183.
[2]Welker T C.Experimental and computational failure analysis of graphite/bismaleimide laminate composites and carbon form in sandwichconstruction[D].Wright-Patterson AFB,OH:School of Engineering and Management,2003.
[3]Vadakke V,Carlsson L A.Experimental investigation of compression failure of sandwich specimens with face/core debond[J].Compos-ites Part B,2004,35:583-590.
[4]Cartie D D,Fleck N A.The effect of pin reinforcement upon the through-thickness compressive strength of foam-cored sandwich panels[J].Composites Science and Technology,2003,63:2401-2409.
[5]Kim J M.Design of sandwich beams for concentrated loading[D].Salt Lake City:University of Utah,2001.
[6]Stanley L E,Adans D O.Development and evaluation of stitched sandwich panels[R].NASA/CR-2001-211025,2001.
[7]杜善义,关志东.我国大型客机先进复合材料技术应对策略思考[J].复合材料学报,2008,25(1):1-10.
[8]郑锡涛,孙秦,李野,柴亚南,曹正华.全厚度缝合复合材料泡沫芯夹层结构力学性能研究与损伤容限评定[J].复合材料学报,2006,23(6):29-36.
[9]孙春方,薛元德,胡培.复合材料泡沫夹芯结构力学性能与试验方法[J].玻璃钢/复合材料,2005(2):3-6.
[10]孙春方,李文晓,薛元德,胡培.高速列车用PMI泡沫力学性能研究[J].玻璃钢/复合材料,2006(4):13-19.
[11]孙春方,薛元德,李文晓.铝面板PMI泡沫芯夹层材料力学性能研究[J].建筑材料学报,2007,10(3):364-368.
[12]卢子兴.复合泡沫塑料力学行为的研究综述[J].力学进展,2004,34(3):341-348.
[13]MSC.Marc User s Guide[S].MSC公司,2005.
[14]陈火红,尹伟奇,薛小香.MSC.Marc二次开发指南[M].北京:科学出版社,2003.
[15]刘浩平,张令心,石磊.基于MSC.Marc二次开发的土体静力和地震非线性分析方法[J].地震工程与工程振动,2008,28(3):178-183.
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