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Dynamic tensile and failure behavior of bi-directional reinforced GFRP materials

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Abstract

In this paper, a series of static/dynamic tensile tests are performed for glass fiber reinforced plastic (GFRP) composites. Using the combination of high-speed photography and digital image correlation (DIC) technology, true stress–strain curves in different directions and strain rates are obtained. We also obtained the dynamic failure strain of the material in different directions, which are used to accurately describe the dynamic tensile and failure behavior of the material. The experimental results show that there is a stiffness change point N in three directions under different strain rate (10−3 s−1, 10 s−1, 100 s−1) tensile conditions. The stiffness before and after N point is recorded as Einitial and Echanged respectively. The values of Echanged in weft direction and warp direction are about 30% to 50% of Einitial, while Echanged in tilt direction is only about 10% of Einitial. The fiber has the highest strength in the weft direction and the tilt direction has the lowest strength. With the combination of high-speed photography and DIC technology, the dynamic failure parameters of different directions under the strain rate of 100 s−1 are obtained. The dynamic failure strains in three directions are 0.245, 0.373 and 0.341, respectively. The parameters are verified by impact three-point bending test. These works can more accurately describe the dynamic mechanical behavior of glass fiber reinforced plastic (GFRP) composites and provide reference for the design of GFRP structures.

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Acknowledgements

This work was supported by the National Department of Science and Technology (Grant 2016YFB1200505).

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Authors and Affiliations

  1. Institute of Mechanics, Chinese Academy of Sciences, Beijing, 100190, China

    Zishang Liu, Yuchao Chen & Yanpeng Wei

  2. University of Chinese Academy of Sciences, Beijing, 100049, China

    Zishang Liu, Zhe Yang, Yuchao Chen, Yanpeng Wei & Chenguang Huang

  3. CRRC Qingdao Sifang Co., LTD, Qingdao, 266111, China

    Yangyang Yu

  4. The Quartermaster Research Institute of Engineering and Technology, Beijing, 100010, China

    Maohui Li

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  1. Zishang Liu
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  2. Zhe Yang
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  4. Yangyang Yu
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Correspondence to Yanpeng Wei.

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Liu, Z., Yang, Z., Chen, Y. et al. Dynamic tensile and failure behavior of bi-directional reinforced GFRP materials. Acta Mech. Sin. 36, 460–471 (2020). https://doi.org/10.1007/s10409-019-00920-8

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  • DOI: https://doi.org/10.1007/s10409-019-00920-8

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