碳/芳纶混杂纤维增强波纹夹芯结构低速冲击性能

习涛; 倪爱清; 张笑梅; 李想; 王继辉

doi:10.13801/j.cnki.fhclxb.20220317.001

碳/芳纶混杂纤维增强波纹夹芯结构低速冲击性能

doi: 10.13801/j.cnki.fhclxb.20220317.001

习涛^{1, 2},
倪爱清¹,
张笑梅²,
李想²,
王继辉^3, ,

1.
武汉理工大学　材料复合新技术国家重点实验室，武汉 430070
2.
洛阳船舶材料研究所，洛阳 471039
3.
武汉理工大学　材料科学与工程学院，武汉 430070

详细信息

通讯作者:
王继辉，博士，教授，博士生导师，研究方向为聚合物基复合材料　E-mail: jhwang@whut.edu.cn

中图分类号: TB332
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出版历程
- 收稿日期: 2022-01-19
- 修回日期: 2022-02-15
- 录用日期: 2022-03-03
- 网络出版日期: 2022-03-18
- 刊出日期: 2023-02-15

Low-velocity impact properties of carbon/aramid hybrid fiber reinforced corrugated sandwich structure

XI Tao^{1, 2},
NI Aiqing¹,
ZHANG Xiaomei²,
LI Xiang²,
WANG Jihui^{3
, ,}

1.
State Key Laboratory of Advanced Technology for Material Synthesis and Processing, Wuhan University of Technology, Wuhan 430070, China
2.
Luoyang Ship Material Research Institute, Luoyang 471039, China
3.
School of Materials Science and Engineering, Wuhan University of Technology, Wuhan 430070, China

摘要

摘要: 采用碳纤维和芳纶纤维增强复合材料对波纹夹芯结构的面板进行层间混杂铺层设计，通过真空辅助树脂灌注(VARI)成型工艺制备混杂波纹夹芯结构。在60 J、80 J和100 J三种不同冲击能量下，研究了面板混杂铺层方式对波纹夹芯结构低速冲击性能及冲击后压缩强度的影响，并利用超声C扫和工业CT断层成像两种无损检测技术对波纹夹芯结构的冲击损伤机制进行了分析。结果表明：冲击能量较低时，波纹夹芯结构的吸收能量基本不受面板的混杂铺层方式影响，而凹坑深度随表层碳纤维层数增加而减少。冲击能量较高时，面板为分层式混杂(碳/芳纶纤维单层交替铺层)的波纹夹芯结构的抗冲击性能最好，纤维断裂损伤和层间分层主要发生在试样表层，但损伤面积较大；面板为夹层式混杂(以碳纤维为蒙皮、芳纶纤维为芯材)的波纹夹芯结构具有较高的吸收能量，整个上面板的纤维都发生了断裂破坏，但损伤面积较小。碳/芳纶混杂波纹夹芯结构的面板采用分层式和夹层式的混杂铺层设计时，具有较高的冲击后压缩强度。
- 波纹夹芯结构 /
- 混杂纤维 /
- 低速冲击 /
- 剩余压缩强度 /
- 无损检测
Abstract: The carbon/aramid hybrid fiber reinforced composite laminates were used here as skins to design corrugated sandwich structures, which were fabricated by vacuum assisted resin infusion (VARI) process. Low-speed impact tests were conducted by three levels of energy, 60 J, 80 J and 100 J, and compression after impact tests were then carried out on these structures. Later, non-destructive testing techniques, including ultrasonic C-scan and industrial CT tomography, were applied to analyze the damage mechanism. The effects of hybrid modes on the low-speed impact properties and post-impact residual compression strength of the structures were investigated. The results show that at lower impact energy, the energy absorption of the corrugated sandwich structures is basically not affected by the fiber stacking sequence of the skins, but the dent depth decreases with the increase of carbon-fiber layers on the surface. By increasing the impact energy, the corrugated sandwich structure with inter-layer hybrid skins exhibits better impact performance because fiber fracture and interlayer delamination mainly occur between the external layers but larger damage area. On the other hand, the corrugated sandwich structure with sandwich-like hybrid skins can absorb more energy by penetration of the skins in small area. In conclusion, better post-impact compression capacity can be achieved for carbon/aramid hybrid fiber reinforced corrugated sandwich structures by the adoption of inter-layer or sandwich-like hybrid skin designs.
- corrugated sandwich structure /
- hybrid fiber /
- low-velocity impact /
- residual compressive strength /
- non-destructive testing

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图 1 波纹夹芯结构代表性体积单元(RVE)截面图

PVC—Polyvinyl chloride; h_c, a and θ—Thickness of the foam core, the span length and the corrugation angle, respectively

Figure 1. Representative volume element (RVE) section of the corrugated sandwich structure

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图 2 真空辅助树脂灌注(VARI)成型工艺示意图

Figure 2. Schematic diagram of vacuum assisted resin infusion (VARI) process

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图 3 冲击试样

Figure 3. Impact specimens

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图 4 冲击试验装置

Figure 4. Impact testing apparatus

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图 5 冲击后压缩试验试样夹持方式

Figure 5. Clamping method of specimens in compression after impact test

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图 6 不同冲击能量下波纹夹芯结构的载荷-时间曲线

Figure 6. Load-time curves of corrugated sandwich structures at different impact energies

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图 7 不同冲击能量下波纹夹芯结构的载荷-位移曲线

Figure 7. Load-displacement curves of corrugated sandwich structures at different impact energies

E_md—Energy absorbed at peak load

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图 8 不同冲击能量下波纹夹芯结构的吸收能量-时间曲线

Figure 8. Absorbed energy-time curves of corrugated sandwich structures at different impact energies

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图 9 波纹夹芯结构典型冲击损伤形貌：((a), (c)) 正面图；((b), (d)) 截面图

Figure 9. Typical impact damage morphologies of corrugated sandwich structures: ((a), (c)) Front view; ((b), (d)) Sectional view

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图 10 不同冲击能量下波纹夹芯结构超声C扫图像

Figure 10. Ultrasonic C-scan images of corrugated sandwich structures at different impact energies

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图 11 100 J冲击能量下波纹夹芯结构的CT无损检测图像

Figure 11. CT non-destructive testing images of corrugated sandwich plates at 100 J impact energy

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图 12 不同冲击能量下波纹夹芯结构的剩余压缩强度比

Figure 12. Compression after impact strength ratio of corrugated sandwich plates at different impact energies

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表 1 波纹夹芯结构面板铺层方案

Table 1. Panel stacking schemes of corrugated sandwich structures

Alternative	Hybrid structure	Stacking sequence	Thickness/mm
SC	Non-hybrid	[C₆/core/C₆]	35.81
SA	Non-hybrid	[A₈/core/A₈]	35.96
HI1	Inter-layer hybrid	[CACACACA/core/ACACACAC]	36.32
HI2	Inter-layer hybrid	[C₂A₂C₂A₂/core/A₂C₂A₂C₂]	36.34
HI4	Overlay hybrid	[C₄A₄/core/A₄C₄]	36.38
HS	Sandwich-like hybrid	[C₂A₄C₂/core/C₂A₄C₂]	36.36
Notes: C, A and core—Carbon fabric, aramid fabric and corrugated core, respectively; SC—Pure carbon fiber structure; SA—Pure aramid fiber structure; HI1—Single layer alternately lay-up structure; H12—Every two layers alternately lay-up stucture; H14—Every four layers alternately lay-up stucture; HS—Sandwich structure.

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表 2 不同冲击能量下波纹夹芯结构凹坑深度和损伤面积

Table 2. Dent depth and damage area of corrugated sandwich structures at different impact energies

Impact energy/J	Dent depth/mm						Damage area/mm²
Impact energy/J	SC	HI1	HI2	HI4	HS	SA	SC	HI1	HI2	HI4	HS	SA
60	0.69	0.74	0.62	0.49	0.66	1.07	1026.4	1264.6	1370.5	1541.0	1459.1	—
80	2.79	1.03	0.89	0.80	0.82	1.38	933.0	1413.6	1465.6	1602.7	1863.0	—
100	7.10	1.17	0.92	1.37	2.77	1.55	924.6	2141.9	1805.6	1629.0	1656.4	—

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表 3 波纹夹芯结构在不同冲击能量下的压缩强度

Table 3. Compress strength of corrugated sandwich plates at different impact energies

Impact energy/J	Compress strength/MPa
Impact energy/J	SC	HI1	HI2	HI4	HS	SA
0	39.54	26.13	23.00	27.04	22.81	11.60
60	21.15	20.85	16.41	18.28	18.23	9.73
80	17.12	17.36	15.51	15.65	16.10	9.10
100	14.03	16.51	13.38	12.21	15.34	8.47

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