纤维增强聚合物基复合材料弯曲性能试验国标与美标的对比解析
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摘要
对纤维增强聚合物基复合材料弯曲性能试验标准GB/T 1449-2005和ASTM D7264/D7264M-15从适用范围、原理、设备要求、跨厚比、试样尺寸、失效性判断等方面进行了对比分析,并分别依据两个标准对东丽T300-3k纤维增强环氧树脂复合材料进行了弯曲强度测试对比试验。结果表明:相比GB/T 1449-2005,ASTM D7264/D7264M-15对弯曲性能试验跨距、支座半径及失效性判断的规定更为合理、细致,GB/T 1449-2005缺少失效性判断,且规定的支座半径偏小;依据两个标准测得的弯曲强度平均值分别为927 MPa和966 MPa,变异系数分别为3.60%和3.78%,较低的变异系数说明两种方法均得到了十分稳定的测试数据,但较短的跨距使得依据GB/T 1449-2005测得的弯曲强度比依据ASTM D7264/D7264M-15测得的要低。
The flexural property test standards of fiber-reinforced polymer matrix composites GB/T 1449-2005 and ASTM D7264/D7264 M-15 were compared and analyzed from the aspects of application scope,principle,equipment requirements,span thickness ratio,specimen size and failure judgment.The flexural strength comparison test was carried out to Toray T300-3 kfiber-reinforced epoxy resin composite according to these two standards.The results show that compared with GB/T 1449-2005,ASTM D7264/D7264 M-15 is more reasonable and meticulous in the aspects of flexural property test span,bearing radius and failure judgment.GB/T 1449-2005 lacks failure judgment and the specified bearing size is small.The average bending strength measured according to the two standards is 927 MPa and 966 MPa,respectively,and the coefficient of variation is 3.60%and 3.78%,respectively.The lower coefficient of variation indicates that both methods have very stable test data,but the shorter span makes the bending strength measured according to GB/T 1449-2005 lower than that measured according to ASTM D7264/D7264 M-15.
The flexural property test standards of fiber-reinforced polymer matrix composites GB/T 1449-2005 and ASTM D7264/D7264 M-15 were compared and analyzed from the aspects of application scope,principle,equipment requirements,span thickness ratio,specimen size and failure judgment.The flexural strength comparison test was carried out to Toray T300-3 kfiber-reinforced epoxy resin composite according to these two standards.The results show that compared with GB/T 1449-2005,ASTM D7264/D7264 M-15 is more reasonable and meticulous in the aspects of flexural property test span,bearing radius and failure judgment.GB/T 1449-2005 lacks failure judgment and the specified bearing size is small.The average bending strength measured according to the two standards is 927 MPa and 966 MPa,respectively,and the coefficient of variation is 3.60%and 3.78%,respectively.The lower coefficient of variation indicates that both methods have very stable test data,but the shorter span makes the bending strength measured according to GB/T 1449-2005 lower than that measured according to ASTM D7264/D7264 M-15.
引文
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[2]沈薇,杨胜春,沈真,等.复合材料力学性能表征标准化研究新进展[J].航空制造技术,2009(增刊1):25-27,29.
[3]王为,王艺,周建刚,等.热塑复合材料弯曲强度测试系统分析(一)[J].玻璃纤维,2017(6):16-20.
[4]刘新,许乔奇,武湛君,等.超低温对T700碳纤维/环氧复合材料弯曲性能的影响[J].宇航学报,2016,37(5):618-624.
[5]刘新,武湛君,何辉永,等.单向碳纤维增强树脂基复合材料的超低温力学性能[J].复合材料学报,2017,34(11):2437-2445.
[6]AL TWAL E Q H,CHADWICK R G.Fibre reinforcement of two temporary composite bridge materials:Effect upon flexural properties[J].Journal of Dentistry,2012,40(12):1044-1051.
[7]ANBUSAGAR N R R,PALANIKUMAR K,MOHANARANGAN R,et al.Flexural and impact properties of 2D and 3D Jute/GF/Epoxy hybrid composite materials[J].Applied Mechanics and Materials,2015,766/767:178-182.
[8]马少华,王勇刚,回丽,等.湿热环境对碳纤维环氧树脂复合材料弯曲性能的影响[J].材料工程,2016,44(2):81-87.
[9]施琪,吴亚平,王利霞,等.碳纤维复合材料层合板抗弯性能试验研究[J].兰州交通大学学报,2009,28(4):58-60.
[10]全国纤维增强塑料标准化技术委员会.纤维增强塑料弯曲性能试验方法:GB/T 1449-2005[S].北京:中国标准出版社,2005.
[11]ASTM D7264/D 7264M-15.Standard test method for flexural properties of polymer matrix composite materials[S].US West Conshohocken:American Society of Testing Materials,2015.
[12]陈永乐,胡程耀,霍冀川,等.环氧树脂/短切碳纤维复合材料性能研究[J].中国塑料,2015,29(2):44-48.
[13]高雄,胡侨乐,马颜雪,等.不同结构厚截面三维机织碳纤维复合材料的弯曲性能对比[J].纺织学报,2017,38(9):66-71.
[14]李靖,洪成,郭兵兵,等.铺放成型工艺参数对复合材料板材弯曲强度和层间剪切强度的影响[J].玻璃钢/复合材料,2017(5):72-79.
[15]韩帅,段跃新,李超,等.不同针织结构经编碳纤维复合材料弯曲性能[J].复合材料学报,2011,28(5):52-57.
[16]王汝敏,郑水蓉,郑亚萍.聚合物基复合材料及工艺[M].北京:科学出版社,2004.