高硬度聚脲涂层抗侵性能与断裂机制研究

张鹏; 赵鹏铎; 王志军; 张磊; 任杰; 徐豫新

doi:10.11883/bzycj-2018-0224

高硬度聚脲涂层抗侵性能与断裂机制研究

doi: 10.11883/bzycj-2018-0224

张鹏^{1, 2},
赵鹏铎^2, ,,
王志军¹,
张磊²,
任杰³,
徐豫新³

1.
中北大学机电工程学院, 山西太原 030051
2.
海军研究院, 北京 100161
3.
北京理工大学爆炸科学与技术国家重点实验室, 北京 100081

基金项目:

国家自然科学基金 11302259

国家自然科学基金 11402027

详细信息

作者简介:
张鹏(1989-), 男, 博士研究生

通讯作者:
赵鹏铎, zhaopengduo@163.com

中图分类号: O385
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- 被引次数: 22
出版历程
- 收稿日期: 2018-06-21
- 修回日期: 2018-08-29
- 刊出日期: 2019-01-05

Penetration resistance and fracture mechanism of high-hardness polyurea coating

ZHANG Peng^{1, 2},
ZHAO Pengduo^{2
, ,},
WANG Zhijun¹,
ZHANG Lei²,
REN Jie³,
XU Yuxin³

1.
College of Mechatronic Engineering, North University of China, Taiyuan 030051, Shanxi, China
2.
Naval Research Academy, Beijing 100161, China
3.
State Key Laboratory of Explosion Science and Technology, Beijing Institute of Technology, Beijing 100081, China

摘要

摘要: 鉴于高硬度聚脲与常规聚脲弹性体的区别，研究了高硬度聚脲涂覆钢板结构的抗侵性能及涂层断裂机制。通过弹道实验加载3.3 g立方体破片撞击无涂层、迎弹面涂层、背弹面涂层与双面涂层4种涂覆类型靶板，获得靶板的弹道极限，分析了不同涂覆方式下结构的抗侵性能、涂层断裂规律与微观断口形貌。结果表明：破片冲击作用下，迎弹面涂层断裂程度高且吸能性好，能够有效提高结构抗侵性能，而背弹面涂层破坏先于钢板层且吸能性差，对结构抗侵性能无提升作用；涂层断裂呈现一定的速度效应、厚度效应与微观特征，其规律反映了不同位置涂层的吸能差异。
- 高硬度聚脲 /
- 涂覆钢板 /
- 抗侵性能 /
- 立方体破片 /
- 涂层断裂
Abstract: In view of its differences from the conventional polyurea elastomer, we investigated the penetration resistance and fracture mechanism of coatings made from high-hardness polyurea sprayed on steel plates, using the ballistic experiment to obtain the ballistic limit of uncoated and coated steel plates subjected to 3.3 g cubic fragments, in consideration of polyurea coatings on the front side, the back side and on both sides in coated plates. We also analyzed the penetration resistance, fracture patterns and micro-morphologies of the coatings in different coated structures. The results indicate that the front coatings with severe fractures exhibited a high energy absorption capability, thereby improving the penetration resistance of the coated plates whereas, however, the back coatings that had been destroyed before the steel plates exhibited a lower energy absorption capability, which was bad for raising the penetration resistance. Under the fragment impact, polyurea coatings exhibited obvious velocity effects, thickness effects and micro-morphological characteristics, reflecting the differences of energy absorption in each configuration.
- high-hardness polyurea /
- coated steel plate /
- penetration resistance /
- cubic fragment /
- coating fracture

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图 1 聚脲涂覆钢板

Figure 1. Polyurea coated steel plate

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图 2 3.3 g立方体破片

Figure 2. 3.3 g cubic fragments

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图 3 实验布置示意图

Figure 3. Schematic of experimental setup

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图 4 破片穿靶前后对比

Figure 4. Comparison of impact fragment

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图 5 无涂层钢板的典型失效情况

Figure 5. Typical failures of uncoated steel plates

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图 6 含涂层钢板的典型失效情况

Figure 6. Typical failures of polyurea coated steel plates

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图 7 涂层断口形貌示意图

Figure 7. Fracture morphology of polyurea coatings

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图 8 迎弹面涂层典型断口微观形貌

Figure 8. Fracture micro-morphology of front coating

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图 9 背弹面涂层典型断口微观形貌

Figure 9. Fracture micro-morphology of back coating

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表 1 聚脲力学性能参数

Table 1. Mechanical property parameters of polyurea

产品型号	密度/(g·cm^-3)	拉伸强度/MPa	撕裂强度/(kN·m^-1)	断裂伸长率/%	邵氏硬度
SPUA-307	1.02	25	81	45	D65~75
SPUA-502^[4]	1.02	15	71	200	A85~89
SPUA-601^[5]	1.02	16	50	450
SPUA1220^[6]	1.02	15	71	200
SPUA-306^[7]	1.02	24	85	400	A85~89
Polyurea^[8]		31		Elastomer	A95
Eraspray ESU630D^[9-10]	1.065			Elastomer	D(63±3)
Polyurea^[11-15]				Elastomer

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表 2 实验工况与结果

Table 2. Configurations and results of different plates

靶板类型	钢板厚度/mm	涂层厚度/mm	面密度/(kg·m^-2)	弹道极限/(m·s^-1)	弹道极限提高率/%	极限比吸收能/(J·m²·kg^-1)	极限比吸收能提高率/%
钢板	3	0	23.52	367.73	0	9.49	0
聚脲/钢板	3	6	29.64	501.99	36.5	14.03	47.8
钢板/聚脲	3	6	29.64	377.16	2.6	7.92	-16.5
聚脲/钢板/聚脲	3	3+3	29.64	462.17	25.7	11.89	25.3

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表 3 3 mm涂层的破坏与断裂规律

Table 3. Failure patterns of 3 mm polyurea coatings

涂层位置	破坏特征	破坏情况			断裂示意图
涂层位置	破坏特征	v_i=252.90 m/s	v_i=349.78 m/s	v_i=442.74 m/s	断裂示意图
迎弹面	典型破坏形貌
	径向裂纹数量	4	4
	断裂直径d/mm	42	47	50
背弹面	典型破坏形貌
	径向裂纹数量	10	11	13
	断裂直径d/mm	16	24	30

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