复合材料层压板低速冲击行为及剩余拉伸强度

管清宇; 冯剑飞; 夏品奇; 吴光辉

doi:10.13700/j.bh.1001-5965.2020.0132

复合材料层压板低速冲击行为及剩余拉伸强度

doi: 10.13700/j.bh.1001-5965.2020.0132

管清宇^{1, 2},
冯剑飞³,
夏品奇^1, ,,
吴光辉⁴

1.
南京航空航天大学航空学院, 南京 210016
2.
中国商用飞机有限责任公司上海飞机设计研究院复合材料中心, 上海 201210
3.
中国商用飞机有限责任公司上海飞机设计研究院试验验证中心, 上海 201210
4.
中国商用飞机有限责任公司, 上海 201210

详细信息

通讯作者:
夏品奇, E-mail: xiapq@nuaa.edu.cn

中图分类号: TB332
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- 被引次数: 0
出版历程
- 收稿日期: 2020-04-08
- 录用日期: 2020-05-08
- 网络出版日期: 2021-06-20

Low-velocity impact behavior and residual tensile strength of composite laminates

GUAN Qingyu^{1, 2},
FENG Jianfei³,
XIA Pinqi^{1
, ,},
WU Guanghui⁴

1.
College of Aerospace Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China
2.
Composite Center, Shanghai Aircraft Design and Research Institute, Commercial Aircraft Corporation of China Ltd., Shanghai 201210, China
3.
Test Verification Center, Shanghai Aircraft Design and Research Institute, Commercial Aircraft Corporation of China Ltd., Shanghai 201210, China
4.
Commercial Aircraft Corporation of China Ltd., Shanghai 201210, China

More Information

Corresponding author: XIA Pinqi, E-mail: xiapq@nuaa.edu.cn

摘要

摘要:
通过实验研究了复合材料层压板的低速冲击行为和剩余拉伸强度。首先，通过冲击实验研究了冲头类型和铺层形式对层压板冲击响应的影响，并通过凹坑深度、损伤投影面积、冲击力和冲击能量转化等对冲击损伤特性进行评估。其次，通过准静态拉伸实验调查了层压板的冲击后拉伸响应和剩余拉伸强度。最后，分析了冲头类型和铺层形式对层压板冲击行为和剩余拉伸强度的影响机理。结果表明：冲头类型对层压板冲击损伤的影响与冲击接触面投影面积和凹坑深度的函数关系密切相关；在较高的冲击能量下，条刃形冲头是造成损伤的关键冲击威胁，而立方角形冲头造成的损伤相对不严重；铺层形式对层压板的冲击损伤阻抗性能和拉伸断裂形貌有明显的影响。
- 复合材料 /
- 层压板 /
- 冲头形状 /
- 冲击行为 /
- 拉伸强度
Abstract:
The low-velocity impact behavior and residual tensile strength of composite laminates are experimentally studied in this paper. Firstly, the effects of impactor type and layup type on the impact responses of laminates are investigated by impact tests, and damage characteristics are evaluated by using the dent depth, damage projection area, impact force and impact energy translation. Secondly, the tensile response and residual tensile strength of the laminates after impact are investigated by quasi-static tensile tests. Finally, the mechanism of the effects of impactor type and layup type on the impact behavior and residual tensile strength of the laminates are analyzed. The results indicate that: the effect of impactor type on impact damage of composite laminate is closely related to the function of the projection area of impact contact surface with the dent depth; under the condition of high impact energy, the strip impactor is a critical impact threat to damage, while the damage caused by corner impactor is relatively not serious; the type of layup has a remarkable influence on the impact damage resistance performance and tensile fracture morphology of the laminates.
- composite /
- laminate /
- impactor shape /
- impact behavior /
- tensile strength

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图 1 试件尺寸

Figure 1. Dimensions of test specimen

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图 2 冲击试件夹持

Figure 2. Fixture of impact test specimen

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图 3 冲头

Figure 3. Impactors

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图 4 凹坑深度测量方法

Figure 4. Methods for measuring dent depth

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图 5 超声C扫二维图像

Figure 5. Two-dimensional image of ultrasonic C scan

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图 6 试件损伤

Figure 6. Specimen damage

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图 7 不同冲头类型对应的冲击接触面投影面积和凹坑深度的函数关系

Figure 7. Function relationship of projection area of impact contact surface with dent depth corresponding to different impactor types

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图 8 5种冲头对应的冲击接触面投影面积与凹坑深度的关系

Figure 8. Relationship of projection area of impact contact surface with dent depth corresponding to five impactors

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图 9 不同冲头的冲击力-时间曲线

Figure 9. Impact force-time curves of different impactors

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图 10 不同冲头对应的试件吸收能量-时间曲线

Figure 10. Specimen absorbed energy-time curves of different impactors

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图 11 试件典型拉伸断裂形貌

Figure 11. Typical tensile fracture morphology of test specimens

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图 12 不同冲头条件下的拉伸应力-位移曲线

Figure 12. Tensile stress-displacement curves under different impactor conditions

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表 1 试件铺层

Table 1. Layup of test specimens

代码	铺层顺序	名义厚度/mm
L1	[45/-45/90/45/-45/45/-45/0/45/-45]_S	3.740
L2	[45/0/-45/0/90/0/45/0/-45/0]_S	3.740
注：s表示铺层对称。

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表 2 实验安排

Table 2. Test arrangement

铺层代码	冲头代码	冲头描述	冲击能量/J	备注
L1	N/A	N/A	N/A	拉伸实验
	H12.7	半球形冲头，Ф=12.7 mm	35, 50, 60	冲击后拉伸实验
	H16	半球形冲头，Ф=16 mm	35, 50, 60	冲击后拉伸实验
	H25.4	半球形冲头，Ф=25.4 mm	35, 50, 60	冲击后拉伸实验
L2	Strip	条刃形冲头	35, 50, 60	冲击后拉伸实验
	Corner	立方角形冲头	35, 50, 60	冲击后拉伸实验
	H16	半球形冲头，Ф=16 mm	35, 50, 60	冲击后拉伸实验
注：N/A表示不适用。

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表 3 冲击实验结果汇总

Table 3. Summary of impact test results

铺层代码	冲头代码	凹坑深度/mm			损伤投影面积/mm²
铺层代码	冲头代码	35 J	50 J	60 J	35 J	50 J	60 J
	H12.7	1.038	2.110	穿透	1 629	2 285	2 969
L1	H16	0.379	1.274	2.454	1 232	1 985	2 639
	H25.4	0.246	0.434	0.861	972	1 806	2 165
	Strip	0.207	2.584	穿透	2 000	2 754	3 021
L2	Corner	1.940	2.117	2.530	1 046	1 696	1 961
	H16	0.363	1.051	1.636	1 196	2 050	2 723

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表 4 拉伸实验结果汇总

Table 4. Summary of tensile test results

铺层代码	冲头代码	剩余拉伸强度/MPa
铺层代码	冲头代码	35 J	50 J	60 J
	H12.7	357	355	337
L1	H16	404	372	357
	H25.4	459	399	367
	Strip	427	305	286
L2	Corner	388	369	355
	H16	1 021	928	824

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