Identification and optimization of warping defects in thermoplastic composite laminates

doi:10.19491/j.issn.1001-9278.2025.03.011

Abstract

Abstract:

In this paper， the warping defects appearing in composite laminates produced by fiber placement was addressed. A suitable characterization method was adopted and a non⁃contact visual measurement platform based on morphological principles was established to identify these defects. Through the design of different process parameters， the optimization for solving the detect problem was performed. The relationship between warping degree and tensile performance was explored to further optimize the warping defects. The experimental results indicate that the non⁃contact visual measurement platform could identify the warping degree accurately. The warping defects were reduced with an increase in the heat gun temperature from 300 to 500 ℃. There is a negative correlation between warping degree and tensile performance. The warping can be further optimized by heating the mold.

Key words: thermoplastic composite material, automated fiber placement, warpage, canny edge detection

CLC Number:

TQ320.66

FENG Mengyao, XIN Chunling, REN Feng, ZHAI Yujiao, XU Wenchong, MA Chiyuan, MA Yufei, HE Yadong. Identification and optimization of warping defects in thermoplastic composite laminates[J]. China Plastics, 2025, 39(3): 60-64.

Figures/Tables 16

References 16

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试验编号	热风枪温度/ ℃	铺放速度/ mm·s^-1	压辊压力/ MPa	翘曲度
1	350	6	0.175	0.057
2	500	6	0.175	0.035
3	350	8	0.175	0.045
4	500	8	0.175	0.038
5	350	7	0.150	0.050
6	500	7	0.150	0.042
7	350	7	0.200	0.059
8	500	7	0.200	0.037
9	425	6	0.150	0.034
10	425	8	0.150	0.044
11	425	6	0.200	0.050
12	425	8	0.200	0.049
13	425	7	0.175	0.042
14	425	7	0.175	0.037
15	425	7	0.175	0.038
16	425	7	0.175	0.036
17	425	7	0.175	0.038

试验编号	热风枪温度/ ℃	铺放速度/ mm·s^-1	压辊压力/ MPa	翘曲度
1	350	6	0.175	0.057
2	500	6	0.175	0.035
3	350	8	0.175	0.045
4	500	8	0.175	0.038
5	350	7	0.150	0.050
6	500	7	0.150	0.042
7	350	7	0.200	0.059
8	500	7	0.200	0.037
9	425	6	0.150	0.034
10	425	8	0.150	0.044
11	425	6	0.200	0.050
12	425	8	0.200	0.049
13	425	7	0.175	0.042
14	425	7	0.175	0.037
15	425	7	0.175	0.038
16	425	7	0.175	0.036
17	425	7	0.175	0.038

试验编号	热风枪温度/ ℃	铺放速度/ mm·s^-1	压辊压力 /MPa	模具温度 /℃	翘曲度
1	500	6	0.175	50	0.029
2	350	8	0.175	50	0.041
3	500	8	0.175	50	0.027
4	425	7	0.150	25	0.036
5	425	7	0.200	25	0.045
6	425	7	0.150	75	0.025
7	425	7	0.200	75	0.019
8	350	7	0.175	25	0.044
9	500	7	0.175	25	0.037
10	350	7	0.175	75	0.026
11	500	7	0.175	75	0.029
12	425	6	0.150	50	0.033
13	425	8	0.150	50	0.028
14	425	6	0.200	50	0.035
15	425	8	0.200	50	0.038
16	350	7	0.150	50	0.037
17	500	7	0.150	50	0.029
18	350	7	0.200	50	0.041
19	500	7	0.200	50	0.034
20	425	6	0.175	25	0.044
21	425	8	0.175	25	0.042
22	425	6	0.175	75	0.022
23	425	8	0.175	75	0.021
24	425	7	0.175	50	0.031
25	425	7	0.175	50	0.029
26	425	7	0.175	50	0.029
27	425	7	0.175	50	0.029

试验编号	热风枪温度/ ℃	铺放速度/ mm·s^-1	压辊压力 /MPa	模具温度 /℃	翘曲度
1	500	6	0.175	50	0.029
2	350	8	0.175	50	0.041
3	500	8	0.175	50	0.027
4	425	7	0.150	25	0.036
5	425	7	0.200	25	0.045
6	425	7	0.150	75	0.025
7	425	7	0.200	75	0.019
8	350	7	0.175	25	0.044
9	500	7	0.175	25	0.037
10	350	7	0.175	75	0.026
11	500	7	0.175	75	0.029
12	425	6	0.150	50	0.033
13	425	8	0.150	50	0.028
14	425	6	0.200	50	0.035
15	425	8	0.200	50	0.038
16	350	7	0.150	50	0.037
17	500	7	0.150	50	0.029
18	350	7	0.200	50	0.041
19	500	7	0.200	50	0.034
20	425	6	0.175	25	0.044
21	425	8	0.175	25	0.042
22	425	6	0.175	75	0.022
23	425	8	0.175	75	0.021
24	425	7	0.175	50	0.031
25	425	7	0.175	50	0.029
26	425	7	0.175	50	0.029
27	425	7	0.175	50	0.029

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