PVC泡沫夹芯结构复合材料固化芯材变色对结构性能的影响  

Effect of PVC Foam Discoloration of Solidified Sandwich Structure Composite on Structural Properties

作　　者：温锋 刘辉 王磊 王新文 吴双 WEN Feng;LIU Hui;WANG Lei;WANG Xinwen;WU Shuang(Luoyang Sunrui Wind Turbine Blade Co.Ltd,Luoyang 471039,China)

机构地区：[1]洛阳双瑞风电叶片有限公司,河南洛阳471039

出　　处：《材料开发与应用》2020年第6期60-65,69,共7页Development and Application of Materials

摘　　要：风电叶片固化过程放热常常出现PVC芯材变色问题,为研究PVC芯材变色对复合材料力学性能的影响,特别制备了4种程度变色不同的45 mm厚PVC芯材变色夹芯结构试板,开展夹芯结构四点弯曲试验,对比不同变色程度PVC夹芯结构的弯曲破坏载荷、极限剪切强度和极限疲劳性能.结果表明,严重变色PVC夹芯结构试样与未变色正常试样相比,平均弯曲破坏载荷和剪切强度最大降幅为7.3%;严重变色PVC夹芯结构与正常PVC夹芯结构的弯曲疲劳性能与正常试样的持平或优于正常试样的.剖开变色PVC夹芯泡沫,用电镜观察,没有发现明显结构塌陷现象.The discoloration of PVC core material often occurs during the curing process of wind power blades.In order to study the effect of PVC core material discoloration on the mechanical properties of composite materials,four kinds of 45 mm thick PVC sandwich structured test panels with different degrees of discoloration are prepared,and four-point bending tests on sandwich structure are carried out to compare the bending failure load,ultimate shear strength and ultimate fatigue performance of PVC sandwich structure with different discoloration degrees.The results show that the average bending failure load and shear strength of the severely discolored PVC sandwich structure are reduced by 7.3%compared with those of the normal PVC sandwich structure without discoloration.The bending fatigue performances of the severely discolored PVC sandwich structure and the normal PVC sandwich structure are equal to or better than that of the normal sample.No obvious structural collapse is found inside the discolored PVC sandwich foam by electron microscope.

关 键 词：PVC泡沫 夹芯结构 芯材变色 四点弯曲 

分 类 号：TB332[一般工业技术—材料科学与工程]