孔网钢增强复合材料管的弹性模量研究

Study of Elastic Modulus of Composite Pipe Reinforced by Perforated Sheet Steel

以孔网钢聚乙烯复合管为例,利用单轴压缩实验研究了孔网钢增强复合材料管的力学性能,包括复合管的抗压强度和弹性性质,提出了孔网钢等效弹性模量和开孔因子的概念(分别记为Es和η),根据实验结果和复合材料理论,得到孔网钢等效弹性模量Es和开孔因子η的实验值。运用单孔模型,推导得到了孔网钢等效弹性模量Es和开孔因子η的解析计算公式,由此可计算得到孔网钢增强类复合材料弹性模量的理论值。最后,通过ANSYS有限元分析得到Es和η的数值计算值。研究表明:Es和η的理论计算值与其实验结果、有限元数值计算结果比较,三者吻合较好,可推广用于工程实际。

The mechanical properties,including compressive strength and modulus of elasticity,of perforated sheet steel plastics（for instance,polyethylene） pipe（in short words PSS-PL pipe） were studied by uniaxial compression experiment.Concepts of equivalent elastic modulus of perforated sheet steel（or PSS） and factor of perforations,represented with Es and η respectively,were introduced.Experimental values of equivalent elastic modulus Es of PSS and factor of perforations η were obtained based on the theory of mechanics of composite materials and data of uniaxial compression test.Analytical expressions of Es and η which could be extended to calculate the Yong＇s module of PSS-PL pipe,were derived out by means of single hole model.Finally,numerical results of Es and η were also obtained by finite element software ANSYS.Comparison among theoretical,experimental and finite element numerical results of Es and η shows that they coincide well and the formulae of Es and η could be used in engineering.