Volume 15 Issue 1
Jan.  2022
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CHEN Ren-hong, LIANG Jin, YE Mei-tu, REN Mao-dong, ZHANG Ji-yao. Visual method for measuring forming limit curve of pliable composite film[J]. Chinese Optics, 2022, 15(1): 22-33. doi: 10.37188/CO.2021-0101
Citation: CHEN Ren-hong, LIANG Jin, YE Mei-tu, REN Mao-dong, ZHANG Ji-yao. Visual method for measuring forming limit curve of pliable composite film[J]. Chinese Optics, 2022, 15(1): 22-33. doi: 10.37188/CO.2021-0101

Visual method for measuring forming limit curve of pliable composite film

doi: 10.37188/CO.2021-0101
Funds:  Supported by National Natural Science Foundation of China (No. 51865057)
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  • Corresponding author: liangjin@mail.xjtu.edu.cn
  • Received Date: 2021-05-06
  • Rev Recd Date: 2021-06-18
  • Available Online: 2021-08-17
  • Publish Date: 2022-01-19
  • To address the difficulty in measuring the strain limit of pliable composite film forming tests, a measurement method based on binocular stereo vision combined with digital image correlation is proposed. Firstly, to address the image matching problem in large deformations or cracks in thin films, a weak-correlation step-by-step matching method based on adaptive updating of image matching benchmarks is proposed according to the continuity of adjacent state deformation of series images. Then, according to the differences in the surface strain distribution of the film material with that of the steel parts, a strain field is proposed to fit the limit strain curve of the film material. The software and hardware system of visual measurement is built, and the limit strain curve of a Q235 steel specimen is measured and compared to results from the coordinate grid method. The limit strain accuracy can be improved by 0.02%, which proves the feasibility and accuracy of this method. The pliable composite film specimens prepared by PET, Nylon, Al foil, PP were each measured. The method and system successfully completed the measurement of the forming limit curve of the pliable composite film. The comparative experiments show that the proposed method can quickly and accurately measure the surface strain distribution of pliable composite film during forming. Compared with the coordinate grid method, it has obvious advantages and provides a highly reliable and highly precise method for solving the forming limit strain curve of film materials.
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  • [1]
    陈培忠, 王克俭. 塑料包装材料共挤复合技术发展[J]. 塑料包装,2021,31(1):29-33. doi: 10.3969/j.issn.1006-9828.2021.01.007

    CHEN P ZH, WANG K J. Development of coextrusion technology for plastic packaging materials[J]. Plastics Packaging, 2021, 31(1): 29-33. (in Chinese) doi: 10.3969/j.issn.1006-9828.2021.01.007
    李强, 殷新意, 于妍妍, 等. 取向碳纳米管/环氧树脂复合薄膜制备及结构/性能表征[J]. 复合材料学报,2021,38(9):2767-2775.

    LI Q, YIN X Y, YU Y Y, et al. Preparation and characterization of aligned carbon nanotubes/epoxy composite films[J]. Acta Materiae Compositae Sinica, 2021, 38(9): 2767-2775. (in Chinese)
    张璐. 板料塑性成形极限预测的研究[D]. 秦皇岛: 燕山大学, 2018.

    ZHANG L. Research on prediction of plastic forming limit of sheet metal[D]. Qinhuangdao: Yanshan University, 2018. (in Chinese)
    谭富星, 李明哲, 蔡中义, 等. 钛合金网板多点成形起皱缺陷的数值模拟[J]. 西安交通大学学报,2007,41(9):1026-1030. doi: 10.3321/j.issn:0253-987x.2007.09.005

    TAN F X, LI M ZH, CAI ZH Y, et al. Numerical simulation of wrinkling in multi-point forming process of titanium alloy retiary sheet[J]. Journal of Xi'an Jiaotong University, 2007, 41(9): 1026-1030. (in Chinese) doi: 10.3321/j.issn:0253-987x.2007.09.005
    RAND J L, GRANT D A. Optical measurement of biaxial strain in thin film polymers[J]. ASTM Special Technical Publication, 1997, 131(8): 123-137.
    PEPELNJAK T, BARISIC B. Computer-assisted engineering determination of the formability limit for thin sheet metals by a modified Marciniak method[J]. The Journal of Strain Analysis for Engineering Design, 2009, 44(6): 459-472. doi: 10.1243/03093247JSA503
    梁晋, 史宝全, 唐正宗, 等. 三维网格应变测量方法: 中国, 102322813A[P]. 2012-01-18.

    LIANG J, SHI B Q, TANG ZH Z, et al.. 3D grid strain measurement method: CN, 102322813A[P]. 2011-01-18. (in Chinese)
    梁伟, 黄启斌, 杨晓翔. 基于热转印技术的应变测量网格印制法[J]. 锻压技术,2012,37(6):101-103. doi: 10.3969/j.issn.1000-3940.2012.06.026

    LIANG W, HUANG Q B, YANG X X. Grid-scribed technology for sheet forming strain measuring based on thermal transfer[J]. Forging &Stamping Technology, 2012, 37(6): 101-103. (in Chinese) doi: 10.3969/j.issn.1000-3940.2012.06.026
    朱凯博, 吕晓东, 王敬涛, 等. Android平台下的应变网格测量方法[J]. 工程与试验,2015,55(3):11-13, 54. doi: 10.3969/j.issn.1674-3407.2015.03.004

    ZHU K B, LV X D, WANG J T, et al. Grid strain measurement based on Android mobile phone[J]. Engineering &Test, 2015, 55(3): 11-13, 54. (in Chinese) doi: 10.3969/j.issn.1674-3407.2015.03.004
    胡悦, 王永红, 鲍思源, 等. 高温下数字图像相关散斑最优成像探究[J]. 中国光学,2018,11(5):728-735. doi: 10.3788/co.20181105.0728

    HU Y, WANG Y H, BAO S Y, et al. Optimal imaging of digital image correlation speckle under high temperature[J]. Chinese Optics, 2018, 11(5): 728-735. (in Chinese) doi: 10.3788/co.20181105.0728
    朱飞鹏, 龚琰, 白鹏翔, 等. 基于数字图像相关的光学引伸计应变测量精度研究[J]. 光学 精密工程,2018,26(5):1061-1069. doi: 10.3788/OPE.20182605.1061

    ZHU F P, GONG Y, BAI P X, et al. Study on strain measurement accuracy of optical extensometers based on digital image correlation[J]. Optics and Precision Engineering, 2018, 26(5): 1061-1069. (in Chinese) doi: 10.3788/OPE.20182605.1061
    陈志新, 梁晋, 郭成. 数字散斑相关法在变形测量中的应用[J]. 光学 精密工程,2011,19(7):1480-1485. doi: 10.3788/OPE.20111907.1480

    CHEN ZH X, LIANG J, GUO CH. Application of digital speckle correlation method to deformation measurement[J]. Optics and Precision Engineering, 2011, 19(7): 1480-1485. (in Chinese) doi: 10.3788/OPE.20111907.1480
    唐正宗, 梁晋, 肖振中, 等. 用于三维变形测量的数字图像相关系统[J]. 光学 精密工程,2010,18(10):2244-2253.

    TANG ZH Z, LIANG J, XIAO ZH ZH, et al. Digital image correlation system for three-dimensional deformation measurement[J]. Optics and Precision Engineering, 2010, 18(10): 2244-2253. (in Chinese)
    梁晋, 肖振中, 唐正宗, 等. 大型飞机风洞变形测量的相机标定研究[J]. 西安交通大学学报,2009,43(3):55-59. doi: 10.3321/j.issn:0253-987X.2009.03.012

    LIANG J, XIAO ZH ZH, TANG ZH Z, et al. Large space camera calibration for three-dimensional videogrammetric vibration measurement of large aeroplane model in wind tunnels[J]. Journal of Xi'an Jiaotong University, 2009, 43(3): 55-59. (in Chinese) doi: 10.3321/j.issn:0253-987X.2009.03.012
    杨建柏, 赵建, 孙强. 基于交比不变性的投影仪标定[J]. 中国光学,2021,14(2):320-328. doi: 10.37188/CO.2020-0111

    YANG J B, ZHAO J, SUN Q. Projector calibration based on cross ratio invariance[J]. Chinese Optics, 2021, 14(2): 320-328. (in Chinese) doi: 10.37188/CO.2020-0111
    TANG ZH Z, LIANG J, XIAO ZH ZH, et al. Three-dimensional digital image correlation system for deformation measurement in experimental mechanics[J]. Optical Engineering, 2010, 49(10): 103601. doi: 10.1117/1.3491204
    TANG ZH Z, LIANG J, XIAO ZH ZH, et al. Large deformation measurement scheme for 3D digital image correlation method[J]. Optics and Lasers in Engineering, 2012, 50(2): 122-130. doi: 10.1016/j.optlaseng.2011.09.018
    王立忠, 汪耀, 梁晋, 等. 高速三维数字图像法测量手机跌落全场应变[J]. 光学 精密工程,2018,26(9):2174-2180. doi: 10.3788/OPE.20182609.2174

    WANG L ZH, WANG Y, LIANG J, et al. Measurement of full-field strain incell phone dropping test by high-speed 3D digital image correlation method[J]. Optics and Precision Engineering, 2018, 26(9): 2174-2180. (in Chinese) doi: 10.3788/OPE.20182609.2174
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