MT300/KH420碳纤维/聚酰亚胺树脂复合材料层合圆柱壳高温承载性能

高艺航; 王世勋; 石玉红; 雷勇军; 张大鹏

doi:10.13801/j.cnki.fhclxb.20201017.001

MT300/KH420碳纤维/聚酰亚胺树脂复合材料层合圆柱壳高温承载性能

doi: 10.13801/j.cnki.fhclxb.20201017.001

高艺航^{1, 2,},
王世勋^2,,
石玉红^2,,
雷勇军^1, ,,
张大鹏^1,

1.
国防科技大学　空天科学学院，长沙 410073
2.
北京宇航系统工程研究所，北京 100076

基金项目: 国家自然科学基金(11902348)

详细信息

通讯作者:
雷勇军，教授，博士生导师，研究方向为计算固体力学理论及应用　E-mail：leiyj108@nudt.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: 2020-08-03
- 录用日期: 2020-09-29
- 网络出版日期: 2020-10-19
- 刊出日期: 2021-07-15

Load-bearing capability of laminated MT300/KH420 carbon fiber/polyimide resin composite cylindrical shell at high temperatures

GAO Yihang^{1, 2
,},
WANG Shixun^2
,,
SHI Yuhong^2
,,
LEI Yongjun^{1
, ,},
ZHANG Dapeng^1
,

1.
College of Aerospace Science and Engineering, National University of Defense Technology, Changsha 410073, China
2.
Beijing Institute of Astronautical Systems Engineering, Beijing 100076, China

摘要

摘要: 基于Donnell-Mushtali近似理论及热弹性理论，考虑结构热变形和材料高温性能衰减等温度影响因素，对MT300/KH420碳纤维/聚酰亚胺树脂复合材料圆柱壳在常温、420℃及周向210~420℃不均匀温度场等热载工况下的承载性能进行了理论分析。并引入一阶屈曲模态缺陷作为几何初始扰动，利用ABAQUS，采用非线性显式动力学方法完成对MT300/KH420复合材料圆柱壳在以上热载工况下的轴压稳定性有限元仿真计算，计算结果与理论分析较为一致。设计并开展MT300/KH420复合材料圆柱壳力-热载荷联合轴压试验，获得圆柱壳在以上热载工况下的破坏载荷和破坏模式。研究表明：高温工况下，力学性能衰减和温场不均匀引起的结构热变形是影响MT300/KH420复合材料圆柱壳轴向失稳载荷的主要因素。
- 高温 /
- 复合材料层合圆柱壳 /
- 轴压稳定性 /
- 理论分析 /
- 试验研究
Abstract: Based on Donnell-Mushtali approximate theory, combined with thermal elasticity theory, the axial load-bearing capability of MT300/KH420 carbon fiber/polyimide resin composite shell at ambient temperature, 420℃ and circumferential temperature distribution of 210–420℃ were evaluated by analytical methods, taking into consideration of the thermal deformation of structure, material’s degradation and other terms at high temperatures. In addition, the FEM analysis model was established by ABAQUS, which introduced the 1st buckling mode generated by buckle analysis as the original imperfection, and then studied the axial stability characteristics of MT300/KH420 composite shells by non-linear explicit dynamic method. The instability load and buckling mode are both presented which agree with the results obtained by analytical method. Furthermore, a thermal-mechanical joint axial compression test was designed and implemented, thus the failure loads and modes were obtained at above thermal fields. The results indicate that the material’s degradation and asymmetry deformation caused by non-uniform thermal fields are principal factors which impact the load-bearing capability of MT300/KH420 composite shells at high temperatures.
- high temperature /
- laminated composite cylindrical shells /
- axial stability characteristics /
- analytical analysis /
- experimental study

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图 1 MT300/KH420碳纤维/聚酰亚胺树脂复合材料圆柱壳示意图

Figure 1. Schematic of MT300/KH420 carbon fiber/polyimide resin composite cylindrical shell

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图 2 温区划分

Figure 2. Division of temperature regions

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图 3 MT300/KH420复合材料圆柱壳轴压稳定性理论分析结果比较

Figure 3. Comparison of theoretical analysis results of axial stability characteristics of MT300/KH420 composite cylindrical shell

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图 4 MT300/KH420复合材料圆柱壳有限元模型载荷和边界条件

Figure 4. Load and boundary in FEM model of MT300/KH420 composite cylindrical shell

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图 5 MT300/KH420复合材料圆柱壳轴压稳定性非线性显式动力学有限元分析结果比较

Figure 5. Comparison of FEM analysis results of axial stability characteristics of MT300/KH420 composite cylindrical shell by non-linear explicit dynamic method

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图 6 MT300/KH420复合材料圆柱壳中心约束参考点载荷-位移曲线

Figure 6. Load-displacement curves of center constrained reference point of MT300/KH420 composite cylindrical shell

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图 7 不同温度下轴压加载MT300/KH420复合材料圆柱壳的变形

Figure 7. Deformation of MT300/KH420 composite cylindrical shell caused by axial load at different temperatures

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图 8 室温和高温下轴压破坏试验加载方式

Figure 8. Loading method of axial compress destructive test at ambient and high temperatures

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图 9 各载荷工况下MT300/KH420复合材料圆柱壳轴压破坏载荷比较

Figure 9. Comparison of axial failure loads of MT300/KH420 composite cylindrical shell at different load conditions

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图 10 室温MT300/KH420复合材料圆柱壳轴压破坏形貌

Figure 10. Fracture appearance caused by axial load of MT300/KH420 composite cylindrical shell at ambient temperature

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图 11 420℃均匀温场MT300/KH420复合材料圆柱壳轴压破坏形貌

Figure 11. Fracture appearance caused by axial load of MT300/KH420 composite cylindrical shell at uniform thermal field of 420℃

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图 12 210~420℃非均匀温场MT300/KH420复合材料学报圆柱壳轴压破坏形貌

Figure 12. Fracture appearance caused by axial load of MT300/KH420 composite cylindrical shell at non-uniform thermal field of 210–420℃

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表 1 材料性能参数

Table 1. Material property parameters

Temperature/℃	Engineering constant			Expansion coefficient
Temperature/℃	${E_x}$/MPa	${E_y}$/MPa	${E_{\rm{s}}}$/MPa	${\nu _x}$	${\alpha _x}$/10⁻⁷	${\alpha _y}$/10⁻⁵
Ambient temperature	110700	9120	3700	0.32	5.2	3.33
210	99630/90%	8208/90%	2960/80%	0.32	5.2	3.33
420	88560/80%	7296/80%	2220/60%	0.32	5.2	3.33
Notes: 55350/50% means ${E_x}$=55350 MPa，which is 50% of the value at ambient temperature; ${E_x}$, ${E_y}$, ${E_{\rm{s}}}$—Modulus in longitudinal, transverse and shear directions, respectively; ${\nu _x}$—Poisson’s ratio; ${\alpha _x}$, ${\alpha _y}$—Coefficients of thermal expansion in longitudinal and transverse directions, respectively.

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表 2 MT300/KH420复合材料圆柱壳轴压稳定性理论分析结果

Table 2. Theoretical analysis results of axial stability characteristics of MT300/KH420 composite cylindrical shell

Material’s degradation		Ambient temperature	420℃	210–420℃
Without considering material’s degradation	Buckling load/kN	651.12	651.20	551.70
Without considering material’s degradation	Change rate/%	—	0.01	−15.3
Considering material’s degradation	Buckling load/kN	651.12	507.80	437.06
Considering material’s degradation	Change rate/%	—	−22.0	−32.9

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表 3 MT300/KH420复合材料圆柱壳轴压稳定性非线性显式动力学分析结果

Table 3. FEM analysis results of axial stability characteristics of MT300/KH420 composite cylindrical shell by non-linear explicit dynamic method

Material’s degradation		Ambient temperature	420℃	210–420℃
Without considering material’s degradation	Buckling load/kN	554.88	523.15	467.47
Without considering material’s degradation	Change rate/%	—	−5.7	−15.7
Considering material’s degradation	Buckling load/kN	554.88	431.26	375.26
Considering material’s degradation	Change rate/%	—	−22.3	−32.4

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表 4 各载荷工况下MT300/KH420复合材料圆柱壳轴压破坏载荷

Table 4. Axial failure loads of MT300/KH420 composite cylindrical shell at different load conditions

Buckling load	Ambient temperature	420℃	210–420℃
Load/kN	394.1	332.2	92.7
Change rate/%	—	−15.7	−76.5

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表 5 MT300/KH420复合材料圆柱壳轴压稳定性理论及有限元分析与试验结果对比

Table 5. Results comparison of analytical methods, FEM analysis and experimental study of axial stability characteristics of MT300/KH420 composite cylindrical shell

Analysis method		Ambient temperature	420℃	210–420℃
Theoretical analysis	Buckling load/kN	651.12	507.80	437.06
Theoretical analysis	Change rate/%	—	−22.0	−32.9
FEM analysis	Buckling load/kN	554.88	431.26	375.26
FEM analysis	Change rate/%	—	−22.3	−32.4
Experimental study	Buckling load/kN	394.1	332.2	92.7
Experimental study	Change rate/%	—	−15.7	−76.5

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