| 研究生: |
張育堯 Chang, Yu-Yao |
|---|---|
| 論文名稱: |
無壓力釜預浸布/纖維複合疊層複材之特性研究 Study on Characteristics of Out-of-Autoclave Processed Composites by Prepreg/Fiber Interleaved Layup |
| 指導教授: |
楊文彬
Young, Wen-Bin |
| 學位類別: |
碩士 Master |
| 系所名稱: |
工學院 - 航空太空工程學系 Department of Aeronautics & Astronautics |
| 論文出版年: | 2021 |
| 畢業學年度: | 109 |
| 語文別: | 中文 |
| 論文頁數: | 175 |
| 中文關鍵詞: | 無壓力釜製程 、真空袋成型法 、碳纖維預浸布/乾布 、抗彎試驗 、衝擊後壓縮試驗 |
| 外文關鍵詞: | out-of-autoclave process, vacuum bag only, carbon fiber/prepreg, bending test, compression after impact test |
| 相關次數: | 點閱:67 下載:0 |
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本論文應用真空袋成型法,製作出完全浸潤式預浸布和乾纖維布交互堆疊的複合疊層板進行研究,並針對四個部分做探討。第一個部分製作兩片OOA-{Pb/F/Pb/F/Pb}2-50x50 cm2的碳纖維複材板,經過超音波檢測、特定點厚度量測以及抗彎試驗的結果顯示,本製程複材板具有與Autoclave複材板近似的低孔隙率品質,且兩片複材板的量測厚度標準偏差大約都是0.01 mm,反映出厚度均勻性佳且再現性高。此外,兩片複材板的平均抗彎強度差異甚小,證實應用本製程製作的大面積複材板,其內部孔隙或疊層界面的結合度與位置無關,並反映出本製程的均勻性。第二個部分,是將OOA-{Pb/F/Pb/F/Pb}2與Autoclave複材板進行機械性質比較和FIB微結構分析,測試結果顯示,由於單向碳纖維乾布的編織「緯紗」導致本製程製作的複材板層間界面強度較弱,抗彎強度、CAI強度和CBI強度,分別大約為Autoclave複材板的84%、72%和83%。第三個部分經過抗彎試驗以及FIB微結構分析結果顯示,應用本製程製作{P0/P90/F0/P90/P0/F90/P0/P90}S碳纖維複材板,由於預浸布與碳纖維乾布交界面的纖維方向不同,導致預浸布的碳纖維絲無法填充乾纖維布由緯紗編織隔開的縫隙而形成孔洞缺陷。將其調整為{P90/P0/F0/P0/P90/F90/P90/P0}S疊層組合之後,該孔洞缺陷明顯改善,且抗彎強度提升了大約18%,反映出複材板內部孔隙減少或疊層界面結合度增強。第四個部分經過超音波檢測結果顯示,應用本製程於製作單向玻璃纖維預浸布和雙向編織玻璃纖維乾布的複材板具有低孔隙率品質,證實應用本製程於不同材質或編織形式的材料之可行性。
In this study, VBO process is used to fabricate composite laminates in which fully impregnated prepreg and dry fiber fabric are interleaved layup. In this thesis, the following four parts are discussed. In first part, two OOA-{Pb/F/Pb/F/Pb}2 carbon fiber composite laminates, 50x50 cm2 in size, are produced. The results of ultrasonic scan, specific points thickness measurement, and bending test show that the composite laminates of this process have a low porosity similar to that of Autoclave composite laminate. The standard deviation of the measured thickness of the two composite laminates is about 0.01mm, which reflects the good thickness uniformity and high reproducibility. In addition, the difference in the average bending strength of the composite laminates is very small, which proves that the large-area composite laminates produced by this process have no relation to the position of the internal pores or the bonding of the laminated interface. This reflects the robustness of the process. The second part is to compare the mechanical properties of OOA-{Pb/F/Pb/F/Pb}2 and Autoclave composite laminates. The FIB micrography was also performed to examine the micro structures of the composites. The test results show that, due to the woven "weft yarn" of the unidirectional carbon fiber dry fabric, the interface strength between the composite laminate is weak, and the bending strength is about 84% of the Autoclave composite laminate; the CAI strength and CBI strength of the OOA process are about 72% and 83% of the Autoclave composite laminate, respectively. The third part of the bending test and FIB micrography results show that the {P0/P90/F0/P90/P0/F90/P0/P90}S carbon fiber composite laminate, due to the different fiber directions of the prepreg and the carbon fiber dry fabric, the resin from the prepreg cannot fill the gaps separated by the weft yarn of the fiber dry fabric, resulting in void defects. After adjusting the stacking sequence to {P90/P0/F0/P0/P90/F90/P90/P0}S, the void defects are significantly improved and the flexural strength is increased by about 18%, reflecting the reduction of internal pores in the composite. In the fourth part, ultrasonic testing results show that this process in the production of unidirectional glass fiber prepreg and bidirectional woven glass fiber dry fabric composite laminate has low porosity quality, confirming the feasibility of applying this process to different materials and weaving forms.
[1] Hyun, D. K., Kim, D., Hwan Shin, J., Lee, B. E., Shin, D. H. and Hoon Kim, J., Cure cycle modification for efficient vacuum bag only prepreg process, Journal of Composite Materials, vol. 55, no. 8, pp. 1039-1051, 2021.
[2] Centea, T., Grunenfelder, L. K. and Nutt, S. R., A review of out-of-autoclave prepregs-Material properties, process phenomena, and manufacturing considerations, Composites Part A: Applied Science and Manufacturing, vol. 70, pp. 132-154, 2015.
[3] Campbell Jr, F. C., Manufacturing technology for aerospace structural materials, Elsevier, 2011.
[4] Grunenfelder, L., Centea, T., Hubert, P. and Nutt, S., Effect of room-temperature out-time on tow impregnation in an out-of-autoclave prepreg, Composites Part A: Applied Science and Manufacturing, vol. 45, pp. 119-126, 2013.
[5] Centea, T., Hughes, S., Payette, S., Kratz, J. and Hubert, P., Scaling challenges encountered with out-of-autoclave prepregs, Paper presented at the 53rd AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics and Materials Conference 20th AIAA/ASME/AHS Adaptive Structures Conference 14th AIAA, 2012.
[6] Harshe, R., A review on advanced out-of-autoclave composites processing, Journal of the Indian Institute of Science, vol. 95, no. 3, pp. 207-220, 2015.
[7] Thorfinnson, B. and Biermann, T., Production of void free composite parts without debulking, Paper presented at the 31st International SAMPE symposium, pp. 480-490, 1986.
[8] Thorfinnson, B. and Biermann, T., Degree of Impregnation of Prepregs-Effects on Porosity, Advanced Materials Technology'87, pp. 1500-1509, 1987.
[9] Repecka, L., and Boyd, J., Vacuum-bag-only-curable prepregs that produce void-free parts, Paper presented at the 47 th International SAMPE Symposium and Exhibition 2002, pp.1862-1874, 2002.
[10] Centea, T., and Hubert, P., Measuring the impregnation of an out-of-autoclave prepreg by micro-CT, Composites Science and Technology, vol. 71, no. 5, pp. 593-599, 2011.
[11] Grunenfelder, L., Dills, A., Centea, T. and Nutt, S., Effect of prepreg format on defect control in out-of-autoclave processing, Composites Part A: Applied Science and Manufacturing, vol. 93, pp. 88-99, 2017.
[12] Kourkoutsaki, T., Comas-Cardona, S., Binetruy, C., Upadhyay, R., and Hinterhoelzl, R., The impact of air evacuation on the impregnation time of Out-of-Autoclave prepregs, Composites Part A: Applied Science and Manufacturing, vol. 79, pp. 30-42, 2015.
[13] Helmus, R., Kratz, J., Potter, K., Hubert, P., and Hinterhölzl, R., An experimental technique to characterize interply void formation in unidirectional prepregs, Journal of Composite Materials, vol. 51, no. 5, pp. 579-591, 2017.
[14] Centea, T., and Hubert, P., Out-of-autoclave prepreg consolidation under deficient pressure conditions, Journal of Composite Materials, vol. 48, no. 16, pp. 2033-2045, 2014.
[15] Thomas, S., Bongiovanni, C. and Nutt, S., In situ estimation of through-thickness resin flow using ultrasound, Composites Science and Technology, vol. 68, no. 15-16, pp. 3093-3098, 2008.
[16] Grunenfelder, L. and Nutt, S., Void formation in composite prepregs-effect of dissolved moisture, Composites Science and Technology, vol. 70, no. 16, pp. 2304-2309, 2010.
[17] Park, S. Y., Choi, C. H., Choi, W. J. and Hwang, S. S., A comparison of the properties of carbon fiber epoxy composites produced by non-autoclave with vacuum bag only prepreg and autoclave process, Applied Composite Materials, vol. 26, no. 1, pp. 187-204, 2019.
[18] Hughes, S. M. and Hubert, P., Out-of-autoclave prepreg processing: effect of integrated geometric features on part quality, Paper presented at the Proceedings of the SAMPE Technical Conference 2013, pp. 21-24, 2013.
[19] Akay, M., Effects of prepreg ageing and post-cure hygrothermal conditioning on the mechanical behaviour of carbon-fibre/epoxy laminate, Composites Science and Technology, vol. 38, no. 4, pp. 359-370, 1990.
[20] 楊宇暉, 無壓力釜預浸布/纖維複合疊層複材製程研究, 國立成功大學航空太空工程學系碩士論文, 2019.
[21] Hubert, P., Centea, T., Grunefelder, L., Nutt, S., Kratz, J. and Lévy, A., 2.4 Out-of-Autoclave Prepreg Processing, Elsevier, pp. 63-94, 2018.
[22] BAR-CHOHEN, Y. and Crane, R., Acoustic-backscattering imaging of subcritical flaws in composites, Materials Evaluation, vol. 40, no. 9, pp. 970-975, 1982.
[23] Fahr, A. and Kandeil, A. Y., Ultrasonic C-scan inspection of composite materials, Engineering Journal of Qatar University, vol. 5, pp. 201-222, 1992.
[24] Moreno, M. S., Gutierrez, A. R. and Vicente, J. M., Flexural testing on carbon fibre laminates taking into account their different behaviour under tension and compression, Paper presented at the IOP Conference Series: Materials Science and Engineering, vol. 139, no. 1, 2016.
[25] ASTM, Standard test methods for flexural properties of unreinforced and reinforced plastics and electrical insulating materials, D790-17, 2017.
[26] Richardson, M. and Wisheart, M., Review of low-velocity impact properties of composite materials, Composites Part A: Applied Science and Manufacturing, vol. 27, no. 12, pp. 1123-1131, 1996.
[27] Amaro, A., Reis, P. and De Moura, M., Delamination effect on bending behaviour in carbon-epoxy composites, Strain, vol. 47, no. 2, pp. 203-208, 2011.
[28] Sanchez-Saez, S., Barbero, E., Zaera, R. and Navarro, C., Compression after impact of thin composite laminates, Composites Science and Technology, vol. 65, no. 13, pp. 1911-1919, 2005.
[29] ASTM, Standard test method for measuring the damage resistance of a fiber-reinforced polymer matrix composite to a drop-weight impact event, D7136-15, 2015.
[30] ASTM, Standard test method for compressive residual strength properties of damaged polymer matrix composite plates, D7137-17, 2017.