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- 2016
基于FBG应变监测的环氧树脂固化收缩及工艺参数优化
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Abstract:
采用布拉格光纤光栅（FBG）传感器，对一种典型液态成型环氧树脂在不同固化工艺以及后固化过程中的温度及应变进行了实时在线监测。通过将树脂内部应变变化转化为树脂线性体积变化，得到不同工艺过程中树脂的固化收缩规律，以此作为依据对树脂的经验固化及后固化工艺参数进行验证和优化。结果表明：所选液态成型树脂在80℃下固化，其固化度和玻璃化转变温度分别为90%和85℃，高于75℃固化树脂，但其总固化体积收缩只比75℃固化时略为增加了约5%；树脂在120℃下进行后固化处理时，恒温180 min后FBG传感器监测到的树脂内部应变已不再变化，此时树脂已基本完全固化，无需再延长后固化时间。 Temperature and strain in a representative liquid molding epoxy resin were in-situ monitored by Fiber Bragg Grating (FBG) sensors throughout different curing processes and post-curing processes. Curing shrinkage regularity of the resin in different processes was derived from its linear volume variation transformed from the strain evolution in resin. Process parameters of experiential curing and post-curing processes were validated and optimized based on the curing shrinkage. The results show that conversion degree and glass transition temperature of the liquid moldingresin cured at 80℃ are 90% and 85℃ respectively, which are higher than resin cured at 75℃. However, total curing shrinkage of the resin cured at 80℃ is only 5% higher than cured at 75℃. The strain in resin becomes constant after 180 min in isothermal procedure of 120℃ post-curing, which means the resin is cured completely. There is no need to extend the post-curing time. 国家自然科学基金（51203144）
| [1] | 何曼君, 张红东. 高分子物理[M]. 3版. 上海: 复旦大学出版社, 2008: 111-114. HE M J, ZHANG H D. Polymer physics[M]. 3rd ed. Shanghai: Fudan University Press, 2008: 111-114 (in Chinese). |
| [2] | GARSTKA T, ERSOY N, POTTER K D, et al. In situ measurements of through-the-thickness strains during processing of AS4/8552 composite[J]. Composites Part A: Applied Science and Manufacturing, 2007, 38(12): 2517-2526. |
| [3] | ERSOY N, GARSTKA T, POTTER K, et al. Development of the properties of a carbon fibre reinforced thermosetting composite through cure[J]. Composites Part A: Applied Science and Manufacturing, 2010, 41(3): 401-409. |
| [4] | LI C, POTTER K, WISNOM M R, et al. In-situ measurement of chemical shrinkage of MY750 epoxy resin by a novel gravimetric method[J]. Composites Science and Technology, 2004, 64(1): 55-64. |
| [5] | PRASATYA P, MCKENNA G B, SIMON S L. A viscoelastic model for predicting isotropic residual stresses in thermosetting material: Effects of processing parameters[J]. Journal of Composite Materials, 2001, 35(10): 826-849. |
| [6] | WHITE S R, HAHN H T. Process modelling of composite materials: Residual stress development during cure. Part Ⅱ experimental validation[J]. Journal of Composite Materials, 1992, 26(16): 2423-2453. |
| [7] | 寇哲君, 戴棣, 曹正华. 复合材料结构固化变形预测[J]. 材料工程, 2007(z1): 225-228. KOU Z J, DAI D, CAO Z H. Prediction of cure induced deformation for composite structures[J]. Journal of Materials Engineering, 2007(z1): 225-228 (in Chinese). |
| [8] | 程文礼, 邱启艳, 陈静. 热压罐成型复合材料固化变形机理及控制研究[J]. 材料导报, 2012, 26(2): 410-414. CHENG W L, QIU Q Y, CHEN J. Study on the cure-induced deformation mechanism and control of composite structures in autoclave process[J]. Materials Review, 2012, 26(2): 410-414 (in Chinese). |
| [9] | WISNOM M R, GIGLIOTTI M, ERSOY N, et al. Mechanisms generating residual stresses and distortion during manufacture of polymer-matrix composite structures[J]. Composites Part A: Applied Science and Manufacturing, 2006, 37(4): 522-529. |
| [10] | KHOUN L, HUBERT P. Investigation of the dimensional stability of carbon epoxy cylinders manufactured by resin transfer moulding[J]. Composites Part A: Applied Science and Manufacturing, 2010, 41(1): 116-124. |
| [11] | PARLEVLIET P P, BERSEE H E N, BEUKERS A. Shrinkage determination of a reactive polymer with volumetric dilatometry[J]. Polymer Testing, 2010, 29(4): 433-439. |
| [12] | JUNG W K, CHU W S, AHN S H. Measurement and compensation of spring-back of a hybrid composite beam[J]. Journal of Composite Materials, 2007, 41(7): 851-864. |
| [13] | SVANBERG J M, HOLMBERG J A. An experimental investigation on mechanisms for manufacturing induced shape distortions in homogeneous and balanced laminates[J]. Composites Part A: Applied Science and Manufacturing, 2001, 32(6): 827-838. |
| [14] | 徐立波. 复合材料残余应力及其控制[J]. 长春理工大学学报(综合版), 2005, 1(4): 122-123. XU L B. Residual stress of composites and its control[J]. Changchun University of Science and Technology (Vocational Education Edition), 2005, 1(4): 122-123 (in Chinese). |
| [15] | PARLEVLIET P P, BERSEE H E N, ADRIAAN B. Measurement of (post-) curing strain development with Fibre Bragg Gratings[J]. Polymer Testing, 2010, 29(3): 291-301. |
| [16] | 秦伟, 吴晓宏, 曹茂盛. RTM工艺成型复合材料树脂固化过程残余应变监测研究[J]. 航空材料学报, 2005, 25(4): 50-52. QIN W, WU X H, CAO M S. Monitoring for residual strain of resin cure during the process of RTM composites[J]. Journal of Aeronautical Materials, 2005, 25(4): 50-52 (in Chinese). |
| [17] | 陈宏伟, 李炜. Bragg光栅传感器在复合材料加工与检测中的应用[J]. 纤维复合材料, 2009, 26(3): 26-28. CHEN H W, LI W. Application of Fiber Bragg Grating sensor in composite manufacturing and health monitoring[J]. Fiber Composites, 2009, 26(3): 26-28 (in Chinese). |
| [18] | 李雪芹, 周玉敬, 张子龙, 等. 光纤布拉格光栅传感器监测环氧树脂固化收缩研究[J]. 材料工程, 2012(8): 73-77. LI X Q, ZHOU Y J, ZHANG Z L, et al. Curing shrinkage monitoring in epoxy resin by Fiber Bragg Grating sensors[J]. Journal of Materials Engineering, 2012(8): 73-77 (in Chinese). |
| [19] | 甘丽, 孙志杰, 顾轶卓, 等. 升温与等温法非模型动力学研究环氧树脂固化反应[J]. 高分子学报, 2010(8): 1016-1022. GAN L, SUN Z J, GU Y Z, et al. Epoxy resin curing reaction studied by dynamic and isothermal model free kinetics[J]. Acta Polymerica Sinica, 2010(8): 1016-1022 (in Chinese). |
| [20] | 吴唯, 刘明昌, 陈玉, 等. E-51环氧树脂固化反应中动力学转变[J]. 复合材料学报, 2011, 28(4): 1-6. WU W, LIU M C, CHEN Y, et al. Shifting of the curing kinetics of E-51 epoxy resin[J]. Acta Materiae Compositae Sinica, 2011, 28(4): 1-6 (in Chinese). |
| [21] | 李恒, 王德海, 钱夏庆. 环氧树脂固化动力学的研究及应用[J]. 玻璃钢/复合材料, 2013(4): 43-50. LI H, WANG D H, QIAN X Q. Research of epoxy resin curing kinetics and its application[J]. Fiber Reinforced Plastics/Composite, 2013(4): 43-50 (in Chinese). |
