SW220/430LV在不同温度下热-力压缩行为研究和表征建模

陈国涛; 梅志远; 夏奕

doi:10.13801/j.cnki.fhclxb.20230526.001

SW220/430LV在不同温度下热-力压缩行为研究和表征建模

doi: 10.13801/j.cnki.fhclxb.20230526.001

1.
海军工程大学　舰船与海洋学院，武汉 430033
2.
中国人民解放军92728部队，上海 200040

基金项目: 国家自然科学基金面上资助项目(51479205；51609252)；海军工程大学舰船与海洋学院强基计划

详细信息

通讯作者:
梅志远，博士，教授，博士生导师，研究方向为舰船功能复合材料结构工程、舰船结构抗爆与防护工程　E-mail: zhiyuan_mei@163.com

中图分类号: TB332
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出版历程
- 收稿日期: 2023-03-20
- 修回日期: 2023-05-05
- 录用日期: 2023-05-18
- 网络出版日期: 2023-05-28
- 刊出日期: 2024-01-01

Thermal-mechanical compression behavior and characterization modeling of SW220/430LV at different temperatures

1.
College of Naval and Ocean Engineering, Naval University of Engineering, Wuhan 430033, China
2.
No.92728 Unit of PLA, Shanghai 200040, China

Funds: National Natural Science Foundation of China (51479205; 51609252); Strong Base Program, Naval University of Engineering, College of Naval and Ocean Engineering

摘要

摘要: 对S2/430LV进行热-力联合作用下压缩性能试验研究，重点揭示S2/430LV在20~180℃压缩损伤失效机制及强度/模量随温度变化规律；提出一种基于Ha-Springer模型的分段曲线拟合方法，并对强度/模量随温度变化规律进行预报。研究表明：在热-力联合作用下，压缩强度和模量随着温度升高而降低，但模量保留率高于强度；随着温度增加，试样最终失效模式发生改变，在100℃之前，试样呈整体剪切失效模式，纤维束发生扭结，并伴随纤维断裂和损伤路径出现断口；但在100℃以后，最终失效模式表现为树脂基体剪切损伤，而纤维织物形态基本不变；强度和模量随温度变化规律呈“S”形趋势，其中强度-温度曲线在20~80℃为凸曲线，80~180℃则为凹曲线；模量-温度曲线在20~100℃为凸曲线，100~180℃为凹曲线；提出了一种基于Ha-Springer模型的分段曲线拟合方法，并利用Origin软件对强度/模量随温度变化规律进行预报，预报结果与试验结果高度吻合，且吻合程度优于Mahieux模型。
- 热-力联合 /
- 压缩性能 /
- 失效机制 /
- Origin /
- Ha-Springer模型 /
- Mahieux模型
Abstract: The compressive performance test of S2/430LV under the combined effect of heat and force was carried out, with a focus on revealing the compression damage failure mechanism and the variation law of strength/modulus of S2/430LV from 20 to 180℃. A segmented curve fitting method based on the Ha-Springer model was proposed, and the variation law of strength/modulus with temperature was predicted. The study shows that under the combined effect of heat and force, the compressive strength and modulus decrease with the increasing temperature, but the modulus retention rate is higher than that of strength. With the increase of temperature, the final failure mode of the sample changes. Before 100℃, the sample shows an overall shear failure mode, with fiber bundles twisting and accompanied by fiber fracture and damage path fracture. However, after 100℃, the final failure mode is manifested as the shear damage of resin matrix, while the fiber fabric morphology remains basically unchanged. The strength and modulus exhibit an "S"-shaped trend with temperature, where the strength-temperature curve is a convex curve in the range of 20-80℃ and a concave curve in the range of 80-180℃; The modulus-temperature curve is a convex curve in the range of 20-100℃ and a concave curve in the range of 100-180℃. A segmented curve fitting method based on the Ha-Springer model was proposed, and Origin software was used to predict the variation of strength/modulus with temperature. The prediction results are highly consistent with the experimental results and the degree of agreement is better than that of the Mahieux model.
- thermal mechanical coupling /
- compression performance /
- failure mechanism /
- Origin /
- Ha-Springer model /
- Mahieux model

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图 1 S2/430LV试样尺寸及状态

Figure 1. Sample geometry and status of S2/430LV

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图 2 S2/430LV试样与夹具安装及加载状态

Figure 2. Specimen and fixture installation and loading status of S2/430LV

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图 3 试样、温度参照样件及热源相对位置关系

Figure 3. Sample, temperature reference sample and relative position of heat source

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图 4 S2/430LV试样在100℃整体损伤形貌

Figure 4. Overall damage morphology of S2/430LV at 100℃

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图 5 S2/430LV试样在不同温度下沿厚度方向损伤形貌

Figure 5. Specimen damage morphology along thickness direction at different temperatures of S2/430LV

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图 6 S2/430LV压缩强度随温度变化规律

Figure 6. Variation of compressive strength with temperature of S2/430LV

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图 7 S2/430LV压缩模量随温度变化规律

Figure 7. Variation of compressive modulus with temperature of S2/430LV

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图 8 S2/430LV压缩强度和模量保留率随温度变化对比

Figure 8. Comparison of tensile strength and modulus with temperature of S2/430LV

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图 9 S2/430LV应力-位移曲线

Figure 9. Stress-displacement curves of S2/430LV

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图 10 Ha-Springer强度拟合结果与试验结果对比

Figure 10. Comparison between Ha-Springer strength fitting results and experimental results

a—P₀(T₀); b—T₀; c—T_E; d—k; R²—Correlation coefficient

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图 11 Ha-Springer强度完整拟合结果与试验结果对比

Figure 11. Fitting results of Ha-Springer compared with experimental results

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图 12 Ha-Springer模量拟合结果与试验结果对比

Figure 12. Comparison of Ha-Springer modulus fitting results and experimental results

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图 13 Ha-Springer模量完整拟合结果与试验结果对比

Figure 13. Complete fitting results of Ha-Springer modulus compared with the experimental results

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图 14 Mahieux模型拟合结果与试验结果对比

Figure 14. Fitting results of Mahieux compared with experimental results

a'—P_g; b'—P_r; c'—m; d'—T_d; e'—n

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图 15 Mahieux和Ha-Springer拟合结果对比分析

Figure 15. Comparative analysis of Mahieux and Ha-Springer fitting results

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表 1 S2/430LV压缩强度汇总

Table 1. Comprehensive strength summary of S2/430LV

Temperature/℃	T-1/MPa	T-2/MPa	T-3/MPa	T-4/MPa	T-5/MPa	Average/MPa	Dispersion factor/%	Retention rate/%
20	288.60	265.20	292.30	282.90	284.50	282.70	3.70	100.00
40	256.09	285.74	266.41	253.20	256.09	263.51	5.09	93.21
60	227.94	223.95	208.88	217.99	215.40	218.83	3.39	77.41
80	134.07	126.91	133.63	137.98	135.42	133.60	3.07	47.26
100	57.05	49.10	52.42	59.56	64.92	56.61	10.89	20.02
120	23.00	22.43	22.96	23.37	22.08	22.77	2.24	8.05
150	17.02	16.28	16.15	14.28	14.14	15.57	8.28	5.51
180	13.62	12.70	14.58	13.13	11.78	13.16	6.40	4.66
Note: T-1-T-5 represent specimen numbers.

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表 2 S2/430LV压缩模量汇总

Table 2. Comprehensive modulus summary of S2/430LV

Temperature T/℃	T-1/GPa	T-2/GPa	T-3/GPa	T-4/GPa	T-5/GPa	Average /GPa	Dispersion factor/%	Retention rate/%	Strain range
20	21.24	20.69	21.46	21.89	22.04	21.46	2.51	100.00	10⁻³-4×10⁻³
40	20.61	20.74	21.68	21.44	20.86	21.07	2.22	98.15	10⁻³-4×10⁻³
60	20.24	19.36	19.67	21.75	20.41	20.29	4.54	94.51	10⁻³-4×10⁻³
80	14.91	16.02	15.17	15.78	15.44	15.46	2.90	72.05	10⁻³-4×10⁻³
100	12.22	13.85	11.25	12.45	12.36	12.43	7.48	57.89	10⁻³-3×10⁻³
120	6.86	6.05	6.82	6.15	6.53	6.48	5.73	30.20	10⁻³-2×10⁻³
150	4.32	5.23	4.23	3.98	4.12	4.38	11.29	20.39	3×10⁻²-8×10⁻²
180	3.56	2.89	3.44	3.30	3.36	3.31	7.68	15.42	3×10⁻²-8×10⁻²

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表 3 Ha-Springer模型强度预报参数

Table 3. Ha-Springer model strength prediction parameters

Classification	T₀/℃	P₀(T₀)/MPa	T_E/℃	k
Convex curve	20	282.70	80	0.2
Concave curve	80	133.60	250	5
Notes: On the convex curve segment, T₀ is the room temperature, T_E is the highest temperature; In the concave curve range, T₀ is the lowest temperature within the temperature range, T_E is the temperature at which the mechanical properties of the material decay to zero; P₀(T₀) represents the mechanical properties of the material at T₀; k is the temperature coefficient.

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表 4 Ha-Springer模型模量预报参数

Table 4. Ha-Springer model modulus prediction parameters

Classification	T₀/℃	P₀(T₀)/MPa	T_E/℃	k
Convex curve	20	21.46	100	0.2
Concave curve	100	12.43	250	5

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表 5 Mahieux模型强度和模量预报参数

Table 5. Mahieux model strength and modulus prediction parameters

Classification	P_g	P_r	P_d/℃	m	n
Strength/MPa	282.70	13.16	200	10	3
Modulus/GPa	21.46	12.43	200	30	10
Notes: P_g and P_r—Strength or modulus of the material in the glass state and in the rubber state, respectively; P_d—Melting state transition temperature of the material; m and n—Weibull distribution parameter.

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