基于边界效应模型的玻璃纤维复合材料准脆性断裂性能分析

doi:10.13475/j.fzxb.20210805206

纺织学报 ›› 2022, Vol. 43 ›› Issue (07): 75-80.doi: 10.13475/j.fzxb.20210805206

基于边界效应模型的玻璃纤维复合材料准脆性断裂性能分析

竺铝涛¹^,², 郝丽¹, 沈伟², 祝成炎¹()

1.浙江理工大学纺织科学与工程学院(国际丝绸学院), 浙江杭州 310018
2.绍兴宝旌复合材料有限公司, 浙江绍兴 312000

收稿日期:2021-08-11 修回日期:2022-03-22 出版日期:2022-07-15 发布日期:2022-07-29
通讯作者: 祝成炎
作者简介:竺铝涛(1983—),男,讲师,博士。主要研究方向为产业用纺织品和纺织结构复合材料。
基金资助:
浙江省自然科学基金项目(LGG21E050025)

Analysis of quasi-brittle fracture performance of glass fiber composites based on boundary effect model

ZHU Lütao¹^,², HAO Li¹, SHEN Wei², ZHU Chengyan¹()

1. College of Textile Science and Engineering (International Institute of Silk), Zhejiang Sci-Tech University, Hangzhou,Zhejiang 310018, China
2. Shaoxing Baojing Composite Materials Co., Ltd., Shaoxing, Zhejiang 312000, China

Received:2021-08-11 Revised:2022-03-22 Published:2022-07-15 Online:2022-07-29
Contact: ZHU Chengyan

摘要/Abstract

摘要：

为解决玻璃纤维复合材料的准脆性断裂问题,基于边界效应模型,引入玻璃纤维复合材料的单层预浸料厚度作为特征复合材料单元建立解析表达式,在三点弯曲条件下测得带有浅表面刮痕试样的峰值载荷,计算得到准脆性断裂参数:抗拉强度和断裂韧性。经正态分布分析后得到断裂参数均值:抗拉强度为169.48 MPa,断裂韧性为20.34 MPa·m^1/2,在具有95%的可靠性范围内几乎覆盖了全部试验离散点。将试样参数拟合在一起,得到断裂载荷与等效面积的线性拟合曲线,结果表明:使用正态分布法和线性拟合法得到的抗拉强度吻合度较高,二者之间的误差仅为4.95%。

关键词: 玻璃纤维复合材料, 边界效应, 抗拉强度, 断裂韧性, 准脆性断裂性能

Abstract:

In order to solve the quasi-brittle fracture problem of glass fiber composites, the thickness of the single-layer prepreg of the glass fiber composite materials was introduced, based on the boundary effect model, as a microstructure parameter to establish an analytical equation. The quasi-brittle fracture parameters such as tensile strength and fracture toughness were calculated based on the peak load of the specimen, and the mean value of fracture parameters was obtained after normal distribution analysis. The results indicate that the tensile strength is 169.48 MPa and the fracture toughness is 20.34 MPa·m^1/2, covering almost all discrete points within the reliability range of 95%. Fitting the parameters of the specimen together, the linear fitting curve between the fracture load and the equivalent area was obtained with the error being only 4.95%.

Key words: glass fiber composites, boundary effect, tensile strength, fracture toughness, quasi-brittle fracture performance

中图分类号:

TB332

竺铝涛, 郝丽, 沈伟, 祝成炎. 基于边界效应模型的玻璃纤维复合材料准脆性断裂性能分析[J]. 纺织学报, 2022, 43(07): 75-80.

ZHU Lütao, HAO Li, SHEN Wei, ZHU Chengyan. Analysis of quasi-brittle fracture performance of glass fiber composites based on boundary effect model[J]. Journal of Textile Research, 2022, 43(07): 75-80.

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编号	组别	高度W/mm	厚度B/mm	跨度S/mm	跨高比(S/W)	初始划痕a₀/mm	缝高比α
1^#	S-3-4-0	12	3	48	4	0	0
2^#	S-3-4-0.041 67	12	3	48	4	0.5	0.041 67
3^#	S-3-4-0.1	12	3	48	4	1.2	0.1
4^#	S-3-4-0.2	12	3	48	4	2.4	0.2
5^#	S-4-4-0	12	4	48	4	0	0
6^#	S-4-4-0.041 67	12	4	48	4	0.5	0.041 67
7^#	S-4-4-0.2	12	4	48	4	2.4	0.2
8^#	S-5.5-4-0	12	5.5	48	4	0	0
9^#	S-5.5-4-0.041 67	12	5.5	48	4	0.5	0.041 67
10^#	S-5.5-4-0.2	12	5.5	48	4	2.4	0.2

编号	a₀/ mm	抗拉强度/MPa		断裂韧性/(MPa·m^1/2)
编号	a₀/ mm	最大值	最小值	最大值	最小值
1^#	0	201.39	186.84	24.17	22.42
2^#	0.5	167.19	131.61	20.06	15.80
3^#	1.2	217.20	184.05	26.06	22.09
4^#	2.4	221.40	116.91	26.57	14.03
5^#	0	158.11	138.32	18.97	16.60
6^#	0.5	155.11	137.57	18.61	16.51
7^#	2.4	217.96	209.95	25.85	21.93
8^#	0	148.51	165.85	21.62	17.82
9^#	0.5	163.27	138.54	16.62	19.60
10^#	2.4	184.43	152.90	22.14	17.62

编号	最小值	最大值	中值	平均值
1^#	186.84	201.39	189.04	192.83
2^#	131.61	167.19	149.53	152.47
3^#	184.05	217.20	190.28	199.26
4^#	116.91	221.40	171.55	170.35

编号	最小值	最大值	中值	平均值
1^#	22.42	24.17	22.68	23.14
2^#	15.80	20.06	17.94	18.30
3^#	22.09	26.06	22.83	23.91
4^#	14.03	26.57	20.59	20.44

基于边界效应模型的玻璃纤维复合材料准脆性断裂性能分析

Analysis of quasi-brittle fracture performance of glass fiber composites based on boundary effect model

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