Off-Axis Tensile Properties of CFRP Laminates and Non-Linear Lamination Theory Based on Micromechanics Approach.

Tohgo, Keiichiro; Kawahara, Kazutomo; Sugiyama, Yuji

doi:10.1299/kikaia.67.1493

Cited by 8 publications

(2 citation statements)

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“…Plastic deformation was induced in the 90-degree laminas due to fiber kinkings in neighboring laminas. The elasto-plastic constitutive equation of the 90-degree lamina was obtained using the extended Eshelby's equivalent inclusion model proposed by Tohgo et al [3] and the experimentally-obtained compressive stress-strain curve of the matrix resin. The anisotropic yield criteria and the J2 flow rule were used with isotropic strain hardening.…”

Section: Elasto-plastic Fem Analysis To Predict Strain Distributionmentioning

confidence: 99%

Distributed Strain Monitoring for Damage Evolution in CFRP Bolted Structures with Embedded Optical Fibers

Takeda

Minakuchi

Nadabe

2013

KEM

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The authors proposed fiber-optic-based damage monitoring of carbon fiber reinforced plastic (CFRP) bolted joints. Optical fibers were embedded along bolt holes and strain change along the optical fiber induced by internal damage was measured by a Brillouin Optical Correlation Domain Analysis (BOCDA), which is a high spatial resolution distributed strain sensing system. This study began by investigating damage modes of CFRP bolted joints after bearing failure. Effective embedding positions of optical fibers were then proposed and their feasibility was evaluated by finite element analysis simulating the damage propagation in the bolted joint and consequent strain change. Finally, verification tests were conducted using specimens with embedded optical fibers at various positions. It was clearly shown that damage could be detected using residual strain due to fiber-microbuckling (kinking) damage or permanent deformation of neighboring plies. Furthermore, damage size and direction could be estimated from the change in the strain distribution. The system developed is quite useful for a first inspection of large-scale composite structures in aerospace applications.

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Section: Elasto-plastic Fem Analysis To Predict Strain Distributionmentioning

confidence: 99%

Distributed Strain Monitoring for Damage Evolution in CFRP Bolted Structures with Embedded Optical Fibers

Takeda

Minakuchi

Nadabe

2013

KEM

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“…Then their fracture patterns differ in loading direction and stacking sequence. Some research has been done for this effect of the laminate, and some papers have been published [1][2][3][4][5][6][7][8]. However, much of them deal with the cross-ply laminate, and there are little research on quasi-isotropic laminates except the work of M. Uemura and K. Iyama.…”

Section: Introduction Frp Has High Strengthmentioning

confidence: 99%

The Effect of Loading Direction and Stacking Sequence on the Strength in Quasi-Isotropic CFRP Laminates

Nagata

Takezono

Chen

et al. 2003

Journal of the Society of Materials Science, Japan

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For quasi-isotropic CFRP laminates, the elastic stress-strain behavior is expected to be the same in any loading direction and stacking sequence of laminate. But fracture and strength of them may strongly depend on the loading direction and stacking sequence of laminate. The laminate has structurally made up many interfaces and the lamina in the laminate is anisotropic due to embedded fiber. Therefore, once matrix cracking or delamination takes place in the loading laminate, the laminates change into anisotropic ones. In this paper, the tensile tests were carried out in the constant displacement velocity for the specimens, cut out in several directions from each laminate, to investigate the influence of loading direction and stacking sequence on the damage pattern and tensile strength. A FEM code was used to analyze the stresses in the specimens, and the comparison between the calculated stressstrain curves and experimental ones was attempted.In addition, using Tsai-Wu failure criterion, the strength of the laminates were predicted in the various loading directions. And the correlations between the predicted results and experimental one are discussed.

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Evaluation of elastic-plastic response of discontinuous carbon fiber-reinforced thermoplastics: Experiments and considerations based on load-transfer-based micromechanical simulation

Nishikawa

Fukuzo

Matsuda

et al. 2018

Composites Science and Technology

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Off-Axis Tensile Properties of CFRP Laminates and Non-Linear Lamination Theory Based on Micromechanics Approach.

Cited by 8 publications

References 0 publications

Distributed Strain Monitoring for Damage Evolution in CFRP Bolted Structures with Embedded Optical Fibers

Distributed Strain Monitoring for Damage Evolution in CFRP Bolted Structures with Embedded Optical Fibers

The Effect of Loading Direction and Stacking Sequence on the Strength in Quasi-Isotropic CFRP Laminates

Evaluation of elastic-plastic response of discontinuous carbon fiber-reinforced thermoplastics: Experiments and considerations based on load-transfer-based micromechanical simulation

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