Investigation of a critical separation criterion for mode I-Governed fracture of basalt fiber/polypropylene rods via a modified double cantilever beam test

Tobata, Yuta; Naito, Kimiyoshi; Tanks, Jonathon

doi:10.1016/j.compstruct.2021.114778

Cited by 5 publications

(25 citation statements)

References 23 publications

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“…Our previous study speculated that the reason of the difference comes from neglecting the orthotropy. [36] In the present study, the result of the orthotropic model shows good accordance with the experimental results. Therefore, the FEM model considering the orthotropy seems to reproduce the relation between the crack length and cube root of compliance.…”

Section: Crack Length Vs Cube Root Of Compliancesupporting

confidence: 87%

“…Figure 6 presents the relation between the crack length and cube root of compliance of FEM. The experimental results of the previous report [36] were also plotted in Figure 6 (hollow circle). The square plots Small figure shows a definition of P NL,re and P arrst with experimental results [36] (B) normal tensile stress distribution of reloading [MPa] (5 mm notch length specimen) present the result of the isotropic model.…”

Section: Crack Length Vs Cube Root Of Compliancementioning

confidence: 94%

“…The crack length was measured from the straight-line distance between the crack tip and load axis, following our previous studies. [36,38] Material properties used for the numerical analysis are listed in Table 1, which reflect the isotropic and orthotropic cases. Poisson's ratio ν of each direction is assumed 0.3 for the simplification.…”

Section: Property Valuementioning

confidence: 99%

“…In the previous report, the experimental relation between the crack length and cube root of compliance was expressed by the following linear equation. [36]…”

Section: Crack Length Vs Cube Root Of Compliancementioning

confidence: 99%

“…The reloading was subjected as well as the case of the previous study. [36] The bilinear traction-separation law [27,36] was used by substituting the measured maximum normal traction σ nt (=2.8 MPa) and quoting SE IC (=1.5 kJ/m 2 ) of the previous study (See. Table 1).…”

Section: Mode I Fracture Energy (Separation Energy)mentioning

confidence: 99%

See 4 more Smart Citations

Direct measurement and verification of cohesive zone model parameters for basalt/PP rods using the transverse tensile test and virtual double cantilever beam test

2022

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To further our understanding of failure in thermoplastic-based composite rods, the mode I-governed cohesive zone model parameter of a basalt fiber reinforced polypropylene composite rod is evaluated. The relations between stress and strain, the maximum normal traction and final separation displacement are examined using a transverse tensile test method. The measured traction is verified by three-dimensional finite element analysis of rod-shaped double cantilever beam specimens. The numerical results show the close relation between the crack length and cube root of compliance, and yields a representative value of the mode I-governed critical fracture energy.

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Section: Crack Length Vs Cube Root Of Compliancesupporting

confidence: 87%

Section: Crack Length Vs Cube Root Of Compliancementioning

confidence: 94%

Section: Property Valuementioning

confidence: 99%

“…In the previous report, the experimental relation between the crack length and cube root of compliance was expressed by the following linear equation. [36]…”

Section: Crack Length Vs Cube Root Of Compliancementioning

confidence: 99%

Section: Mode I Fracture Energy (Separation Energy)mentioning

confidence: 99%

See 3 more Smart Citations

Direct measurement and verification of cohesive zone model parameters for basalt/PP rods using the transverse tensile test and virtual double cantilever beam test

2022

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Combined experimental–numerical mode I fracture characterization of the pultruded composite bars

Smolnicki

Duda

Zielonka

et al. 2023

Archiv.Civ.Mech.Eng

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In this paper, pultruded GFRP bars are investigated to determine their fracture properties. The double cantilever beam test (DCB) is used to assess fracture behavior under mode I loading conditions. However, due to the presence of the R-curve effect (variable fracture energy dependent on the length of the crack), it is necessary to introduce a nonstandard approach to determine fracture properties. The mixed experimental–numerical approach is proposed to deal with this issue. Numerical simulations were carried out in Simulia Abaqus, and with Python scripting it was possible to generate models and obtain R-curve for the material. The numerical model built based on the experimental results has very good agreement with it (force–displacement and delamination length–time characteristics) which allows the use of the mentioned model in the analysis of more complex structures. Acoustic emission analysis was introduced as an auxiliary technique. The delamination obtained from both the numerical model and the experiment complies with the registered acoustic emission events. The proposed method can be used in preparing a material model for other composite materials, which display the presence of the R-curve effect.

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Mode Ⅰ–Governed fracture energy and maximum normal traction of a CFRP rod

Tobata,

Naito,

Tanks

2023

Journal of Composite Materials

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This study develops a double cantilever beam test by using a specific fixture for measuring the representative critical energy release rate of rigid composite rods. Carbon fiber reinforced epoxy composite rod was used for the evaluation. Finite element analysis applying Cohesive Zone Model was used to estimate the relationship between load and displacement. In addition, for verifying the effect of specimen width on the measurement, the representative critical energy release rate was estimated and compared with reference to the crack length measured from the center or outer tip of the crack. The numerical results showed close value to that of experiment. This suggests that an effective representative critical energy release rate can be measured by the proposed method.

show abstract

Investigation of a critical separation criterion for mode I-Governed fracture of basalt fiber/polypropylene rods via a modified double cantilever beam test

Cited by 5 publications

References 23 publications

Direct measurement and verification of cohesive zone model parameters for basalt/PP rods using the transverse tensile test and virtual double cantilever beam test

Direct measurement and verification of cohesive zone model parameters for basalt/PP rods using the transverse tensile test and virtual double cantilever beam test

Combined experimental–numerical mode I fracture characterization of the pultruded composite bars

Mode Ⅰ–Governed fracture energy and maximum normal traction of a CFRP rod

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