Evaluation of bending performance of carbon fiber-reinforced eucalyptus/poplar composite plywood by digital image correl
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Evaluation of bending performance of carbon fiberreinforced eucalyptus/poplar composite plywood by digital image correlation and FEA analysis Mingjie Guan1,3,*
, Yuansong Liu1,2, Zhiwei Zhang1, and Zhiwei Huang1
1
College of Materials Science and Engineering, Nanjing Forestry University, Nanjing 210037, Jiangsu, China College of Materials Science and Engineering, Beijing Forestry University, Beijing 100089, China 3 Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, Nanjing Forestry University, Nanjing 210027, China 2
Received: 24 February 2020
ABSTRACT
Accepted: 18 March 2020
The failure of composite materials during bending is an issue that must be considered in the performance evaluation of structural materials. Strong–weak interlaminated composites are particularly prone to weak interfaces. In this study, the digital image correlation (DIC) method is used to detect the strain distribution of high-performance carbon fiber-reinforced eucalyptus/poplar composite plywood under three-point bending. Finite element analysis (FEA) method is used to numerically simulate the composite plywood of each reinforced structure, and failure evaluation in the bent state of plywood is carried out. Testing is then undertaken to determine that the FEA simulated value and the DIC measured value fit well. Besides, bending test verifies the failure mode predicted by FEA, which will be a very good prediction method for material failure.
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Springer Science+Business
Media, LLC, part of Springer Nature 2020
Introduction Advances in industrial technology are improving the utilization of wood resources. The application of strengthening low-cost and low-quality fast-growing wood as structural composite materials is becoming increasingly abundant [1, 2]. Carbon fiber (CF) is a new high-strength and high-modulus fiber with more than 95% carbon content [3, 4], and has emerged as Mingjie Guan and Yuansong Liu contributed to this work equally.
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https://doi.org/10.1007/s10853-020-04584-9
an important material in defense, military, and civil fields [5–8]. This material retains the inherent characteristics of carbon materials, combined with the softness and workability of textile fibers. Recently, CF-reinforced plywood has been used as an important load-bearing component in applications such as container floor [9] and building formwork [10]. Carbon fiber is required to bear heavy pressure and impact, and thus the bending performance of the
J Mater Sci
plate is extremely important for the overall product, and stiffness and strength directly affect the bearing performance of the bearing platform. Further empirical research must be conducted to understand the strain distribution and failure of composite plywood in the bending process [11–13]. It is known that DIC is a non-contact, non-interference, and full-field deformation optical metrology method based on computer vision principle, digital image processing, and numerical calculation. It is a widely use
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