碳纤维增强树脂复合材料-热成型钢超混杂层合板层间力学性能

段瑛涛; 武肖鹏; 王智文; 敬敏; 栗娜; 刘强; 宁慧铭; 胡宁

doi:10.13801/j.cnki.fhclxb.20200215.002

碳纤维增强树脂复合材料-热成型钢超混杂层合板层间力学性能

doi: 10.13801/j.cnki.fhclxb.20200215.002

段瑛涛^1,,
武肖鹏^2,,
王智文^1,,
敬敏^1,,
栗娜^1,,
刘强^3,,
宁慧铭^2, ,,
胡宁^2,

1.
北京汽车研究总院有限公司，北京 101300
2.
重庆大学　航空航天学院，重庆 400044
3.
航空工业复合材料技术中心，北京 101300

基金项目: 国家自然科学基金汽车联合重点基金(U1864208)；国家自然科学基金(51603022)

详细信息

通讯作者:
宁慧铭，博士，副教授，硕士生导师，研究方向为复合材料力学　E-mail：ninghuiming@cqu.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: 2019-10-30
- 录用日期: 2020-01-20
- 网络出版日期: 2020-02-17
- 刊出日期: 2020-10-15

Interlaminar mechanical properties of carbon fiber reinforced plastics-thermoformed steel super-hybrid laminates

DUAN Yingtao^1
,,
WU Xiaopeng^2
,,
WANG Zhiwen^1
,,
JING Min^1
,,
LI Na^1
,,
LIU Qiang^3
,,
NING Huiming^{2
, ,},
HU Ning^2
,

1.
Beijing Automotive Technology Center Co. Ltd., Beijing 101300, China
2.
College of Aerospace Engineering, Chongqing University, Chongqing 400044, China
3.
AVIC Composite Technology Center, Beijing 101300, China

摘要

摘要: 通过双悬臂梁试验(DCB)研究了金属表面处理和界面插层协同作用对碳纤维增强树脂复合材料(CFRP)-热成型钢超混杂层合板层间力学性能的影响。试验结果表明，采用金属表面处理与界面插层协同增韧方案，可以极大地提升层合板的I型层间断裂韧性。其中，喷砂/界面胶膜插层试件(GB36#/AF)的I型层间断裂韧性相比于脱脂试件提高了343%；喷砂/界面纯树脂插层试件(GB36#/EP)相比于脱脂试件，其Ⅰ型层间断裂韧性提高了129%。并基于内聚区模型对CFRP-热成型钢超混杂层合板分层失效进行了有限元模拟。最后借助激光共聚焦扫描显微镜(LSM)、接触角测量仪(CAG)、扫描电子显微镜(SEM)等对热成型钢表面形貌和试件的断裂面进行了表征并揭示了层间增韧的机制。
- CFRP-热成型钢超混杂层合板 /
- I型层间断裂韧性 /
- 协同增韧 /
- 有限元分析 /
- 内聚区模型
Abstract: The synergistic effects of the metal surface treatments and interleaves on the interlaminar mechanical properties of the carbon fiber reinforced plastics (CFRP) composite-thermoformed steel super-hybrid laminates were investigated. Double cantilever beam tests (DCB) show that the Mode-I interlaminar fracture toughness of the laminates can be greatly improved by combining metal surface treatment and inserting interleaf. Among them, the interlaminar Mode-I fracture toughness of the specimens with sandblasting/adhesive film interleaves (GB36#/AF) and sandblasting/epoxy resin interleaves (GB36#/EP) increase by 343% and 129% compared with that of the degreased specimens respectively. In addition, based on the cohesive zone model, the delamination of the CFRP-thermoformed steel super-hybrid laminates was analyzed by finite element method. Finally, to uncover the toughing mechanism, confocal laser scanning microscopy (LSM), contact angle goniometer (CAG) and scanning electron microscopy (SEM) were employed to characterize the surface morphology of the thermoformed steel and the fracture surface of the tested laminates.
- CFRP-thermoformed steel super-hybrid laminates /
- Mode-I interlaminar fracture toughness /
- synergistic toughening /
- finite element analysis /
- cohesive zone model

HTML全文

图 1 CFRP-热成型钢超混杂层合板制备流程示意图及热压工艺

Figure 1. Schematic illustration of CFRP-thermoformed steel super-hybrid laminates fabrication and hot pressing process

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图 2 双悬臂梁试验(DCB)试件示意图(预制裂纹位于钢板与插层之间)

Figure 2. Schematic illustration of specimen for double cantilever beam(DCB) tests (Precrack lies between the steel plate and interlayer)

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图 3 CFRP-热成型钢超混杂层合板DCB试样的载荷-位移曲线

Figure 3. Representative load-displacement curves of DCB for CFRP-thermoformed steel super-hybrid laminates

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图 4 CFRP-热成型钢超混杂层合板DCB试样的临界载荷${P_{\rm{C}}}$

Figure 4. Critical load ${P_{\rm{C}}}$ of DCB for CFRP-thermoformed steel super-hybrid laminates

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图 5 CFRP-热成型钢超混杂层合板DCB试样应变能释放率与裂纹扩展增量的阻力曲线

Figure 5. Resistance curves of energy release rate-crack increment of DCB for CFRP-thermoformed steel super-hybrid laminates

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图 6 CFRP-热成型钢超混杂层合板I型断裂韧性 ${G_{{\rm IC}}}$和断裂阻抗${G_{{\rm IR}}}$对比

Figure 6. Comparison of Mode-I fracture toughness ${G_{{\rm IC}}}$ and resistance ${G_{{\rm IR}}}$ for CFRP-thermoformed steel super-hybrid laminates

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图 7 CFRP-热成型钢超混杂层合板DCB实验有限元仿真模型与结果

Figure 7. Finite element model and simulation results of CFRP-thermoformed steel super-hybrid laminates for DCB tests

FEA—Finite element analysis

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图 8 不同表面处理方式下钢板表面的微观形貌

Figure 8. Microstructures of steel surfaces treated with different methods

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图 9 钢板表面的粗糙度轮廓

Figure 9. Surface roughness profiles of the surface treated steel

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图 10 钢板表面的接触角

Figure 10. Contact angles of the treated steel surfaces

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图 11 CFRP-热成型钢超混杂层合板I型层间断裂形貌

Figure 11. Morphologies of the fracture surface of CFRP-thermoformed steel super-hybrid laminates after Mode-I tests

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图 12 CFRP-热成型钢超混杂层合板I型加载下裂纹扩展行为示意图

Figure 12. Schematic explanation of crack growth behavior of CFRP-thermoformed steel super-hybrid laminates under Mode-I loading

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表 1 碳纤维增强树脂复合材料(CFRP)及插层(L-F501胶膜和树脂)的物理参数

Table 1. Physical parameters of carbon fiber reinforced plastics(CFRP) composite and interlayer (L-F501 and epoxy)

Material	Physical parameter	Value
CFRP	Young’s modulus (Fiber direction)/GPa	138
	Young’s modulus (Transverse direction)/GPa	10
	Tensile strength (Fiber direction)/MPa	1 800
	Class fiber volume fraction/vol%	67
L-F501	Young’s modulus/GPa	3.6
	Tensile strength/MPa	40
	Steel-to-steel joint (Untreated)/MPa	28
Epoxy	Young’s modulus/GPa	3
Epoxy	Tensile strength/MPa	60

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表 2 试验方案

Table 2. Experimental schemes

Group	Scheme name	Abbreviation scheme
1	Degreasing	Degreasing
2	600# sandpaper grinding	600#
3	Sandblasting	GB36#
4	Degreasing/adhesive film interleaves	Degreasing/AF
5	Sandblasting/adhesive film interleaves	GB36#/AF
6	Sandblasting/epoxy resin interleaves	GB36#/EP

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