Influence of loading conditions on the measurement of mode I critical stress intensity factor for wood and medium-density fiberboard by the single-edge-notched tension test

Yoshihara, Hiroshi

doi:10.1515/hf.2010.119

Cited by 13 publications

(9 citation statements)

References 30 publications

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“…A statistical analysis of the difference between the K Ic values obtained using the SENB and DCB tests shows that the difference is not signifi cant in this a/W range, regardless of whether the P c value is determined from the P-δ or P-COD relationship. This range coincides well with the range used to derive the appropriate K Ic value in the SENT test (Yoshihara 2010b). When using Eq.…”

Section: Resultssupporting

confidence: 79%

“…An MDF panel, which was used in previous works (Yoshihara, 2010b; Yoshihara and Usuki, 2011), was investigated. The density of the MDF at 12 % moisture content (MC) was 580 ± 10 kg/m 3 .…”

Section: Materijalimentioning

confidence: 99%

“…Therefore, the critical load for crack propagation P c was provisionally determined to be the load at the onset of nonlinearity. This was determined in the same manner as that used for the SENT and CT tests (Yoshihara, 2010b; Yoshihara and Usuki, 2011) and for the DCB tests described below.…”

Section: Materijalimentioning

confidence: 99%

“…In previous works, the K Ic value of medium-density fi berboard (MDF) was examined by SENT and CT tests (Yoshihara, 2010b;Yoshihara and Usuki, 2011). In these tests, we found that the K Ic value of MDF can be effectively measured when considering the additional crack length ahead of the crack tip and restricting the range of initial crack length with respect to the specimen geometry.…”

Section: Introduction 1 Uvodmentioning

confidence: 99%

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Mode I Critical Stress Intensity Factor of Medium - Density Fiberboard Obtained by Single-Edge - Notched Bending Test

Yoshihara

Mizuno

2014

Drvna ind.

Self Cite

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Section: Resultssupporting

confidence: 79%

“…An MDF panel, which was used in previous works (Yoshihara, 2010b; Yoshihara and Usuki, 2011), was investigated. The density of the MDF at 12 % moisture content (MC) was 580 ± 10 kg/m 3 .…”

Section: Materijalimentioning

confidence: 99%

Section: Materijalimentioning

confidence: 99%

Section: Introduction 1 Uvodmentioning

confidence: 99%

See 2 more Smart Citations

Mode I Critical Stress Intensity Factor of Medium - Density Fiberboard Obtained by Single-Edge - Notched Bending Test

Yoshihara

Mizuno

2014

Drvna ind.

Self Cite

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“…Tests of DCB and TDCB specimens can be performed on a variety of materials without particular restrictions on the material choice, as long as the beams are not damaged or do not yield during the test. The testing methods involving these two specimen geometries have been thoroughly examined (Blackman et al 1991(Blackman et al , 2001Dourado et al 2009 ;Yoshihara 2010 ), andalso, BS 7991 (1991) and ASTM D 3433 (1999ASTM D 3433 ( /2005 standards cover the subject. These standards describe the experimental and analytical methods for the determination of the fracture resistance of adhesively bonded DCB and TDCB specimens subjected to mode I loading conditions.…”

Section: Introductionmentioning

confidence: 99%

Effects of systematic variation of wood adherend bending stiffness on fracture properties. Part 2. Revisiting traditional DCB analysis methods

Nicoli¹,

Dillard

Frazier

2012

Holzforschung

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Part 1 of the paper evaluated how the orientation and stiffness of the layers in layered beams of constant cross section used in double cantilever beams (DCB) specimens infl uence the stiffness variation of individual adherends along their length. The behavior of bonded DCB specimens made with such materials, of which wood is a common example, are analyzed in this part 2 of the paper to determine errors associated with common data analysis methods for mode I fracture testing: simple beam theory (SBT), corrected beam theory (CBT), experimental compliance method (ECM or Berry method), and area method (AM). In particular, the fi rst three methods are described in British Standards (BS) 7991 (1991) or the American Society for Testing and Materials (ASTM) D 3433 (1999/2005), while the AM is not suggested by the mentioned standards. SBT, CBT, and ECM, although initially developed for characterizing bonds between uniform and isotropic adherends, have also been commonly applied to other materials including wood. Nevertheless, these three standardized methods may lack precision for determining the critical strain energy release rate, Ic , when applied to bonded wood adherends, due to the elastic stiffness variability that can occur along the length of the bonded beams. The AM yields more coherent results in the developed analytical procedure, although practical issues can limit its reliability with experimental results. Another physical problem that arises with the adherend stiffness variation is the onset of a slight mode II loading component that is not anticipated, nor accounted for, in the traditional data analysis methods.

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Solutions and applications of fracture properties for clamped single edge notched tensile specimen of orthotropic materials

Wang,

Jin,

Chen

et al. 2024

Polymer Composites

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Clamped single edge notched tensile (SENT) specimens are widely used in fracture toughness test and fatigue crack growth experiment of structural materials. However, the existing fracture parameters of clamped SENT specimens are all based on isotropic conditions, which limits the application of anisotropic materials. In this study, a systematic finite element analysis of orthotropic clamped SENT specimens was carried out to determine the stress intensity factor (K) and compliance (C). A wide range of orthotropic and geometric parameters, including crack length over width ratio (a/W), daylight to width ratio (H/W), and material parameters λ and ρ, were considered. The coupling effects of material parameters and geometrical dimensions on fracture properties were then investigated. Results showed that the K and C increase with the increase of a/W and H/W, and decrease with the increase of λ and ρ. The value of C is more sensitive to changes of orthotropic and geometric parameters than the K. Moreover, the accurate solutions for normalized K, C and compliance‐based crack length prediction were developed. Applications of the proposed solutions on experimental data were presented and discussed. The current results will help to accurately calculate the fracture toughness or FCG rate of composites, further advancing the standardization process of composites testing based on SENT specimens.Highlights Evaluate the K and Compliance for orthotropic single edge notched tensile (SENT) specimens using 2D finite element analysis; The coupling effects of orthotropic parameters and geometric sizes are studied; Develop prediction equations for K and C of clamped SENT specimen; Propose a universal crack length estimation method based on the compliance; Discuss the application of the proposed equations to the tested data of UD CFRP.

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Influence of loading conditions on the measurement of mode I critical stress intensity factor for wood and medium-density fiberboard by the single-edge-notched tension test

Cited by 13 publications

References 30 publications

Mode I Critical Stress Intensity Factor of Medium - Density Fiberboard Obtained by Single-Edge - Notched Bending Test

Mode I Critical Stress Intensity Factor of Medium - Density Fiberboard Obtained by Single-Edge - Notched Bending Test

Effects of systematic variation of wood adherend bending stiffness on fracture properties. Part 2. Revisiting traditional DCB analysis methods

Solutions and applications of fracture properties for clamped single edge notched tensile specimen of orthotropic materials

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