Experimental observation and modeling of resin pocket cracking in unidirectional laminates with ply discontinuity

Fikry, M. J. Mohammad; Vinogradov, Vladimir; Ogihara, Shinji

doi:10.1016/j.compscitech.2021.109175

Cited by 9 publications

(1 citation statement)

References 20 publications

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“…et al have investigated the mechanical properties and damage behavior in laminates with fiber discontinuity by using the conventional sampling moiré method. In other studies [5,23,24] he also revealed the microscopic damage mode and microscopic damage mechanism of CFRP under different conditions. However, the traditional sampling moiré method is susceptible to background noise interference, this susceptibility is particularly pronounced in CFRP materials due to their complex fiber discontinuity and heterogeneous multilayer structure [7], contributing to inherent background noise, which introduces errors in the corresponding deformation results.…”

Section: Introductionmentioning

confidence: 95%

Microscale strain distribution measurement before and after crack and delamination occurrence in CFRP laminates by multiplication sampling moiré method

Xie,

WANG,

YAN

2024

International Conference on Optical and Photonic Engineering (icOPEN 2023)

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The multiplication sampling moiré (MSM) method achieves a strong noise-immunity deformation measurement by performing phase analysis of the second harmonic of grating patterns, which surpasses the limitation of the conventional sampling moiré method that produces phase errors when the first harmonic is submerged by the background noise. In this study, the multiplication sampling moiré method was utilized to investigate the fracture behavior of a [±15°]2s carbon fiber reinforced plastic (CFRP) laminate specimen under different tensile loads. The full-field microscopic strain distribution maps, including the normal, shear, and principal strains, were successfully measured on the cross-section of the CFRP laminates with fiber discontinuities. The results show strain distribution characteristics before and after transverse crack occurrence in the matrix resin region of the CFPR laminates, and the changes in shear strain at the interlayer interfaces before and after the emergence of delamination. The MSM method holds promise for evaluating mechanical properties, fracture behavior, characterizing strain distributions, and residual stresses in deformation measurements of various structural and composite materials.

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Section: Introductionmentioning

confidence: 95%