Intensity of singular stress fields causing interfacial debonding at the end of a fiber under pullout force and transverse tension

Noda, Nao‐Aki; Shirao, Ryohji; Li, Jun; Sugimoto, Jun-Suke

doi:10.1016/j.ijsolstr.2006.11.034

Cited by 21 publications

(9 citation statements)

References 19 publications

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“…The problem of finite bonded plate subjected to tension shown in Figure b has been accurately calculated by using the body force method . Since the singular stress fields are similar if the material angles of two bonded structures are the same, then the stress intensity of unknown problem shown in Figure a can be determined by applying this known solution (Figure b) to Equation

\frac{K_{normalσ}}{K_{normalσ}^{*}} = \frac{F_{σ} σ_{0} W^{1 - λ}}{F_{σ} σ_{0}^{*} W^{1 - λ}} = \frac{σ_{r, F E M} - σ_{0} - {\tilde{σ}}_{r}}{σ_{y}^{F E M *}}

…”

Section: Axi‐symmetric Analysis Methods For the Intensity Of Singular mentioning

confidence: 99%

Optimum Design of Ceramic Spray Coating Evaluated in Terms of Intensity of Singular Stress Field

Wang

Noda

Ueno

et al. 2016

steel research int.

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Hearth rolls are the most important tools in continuous annealing line to produce thin steel sheet. Usually, the roll surface is coated by ceramics using thermal spraying. However, material mismatch and temperature change may cause thermal stress leading to the failure of the coating and deteriorating high adhesive strength and wears resistance. Therefore, it is very important to improve the debonding strength by optimizing the design of spray coating. The traditional method of evaluating the debonding strength of spray coating is prescribed as JIS H8304 thermal test. This paper focuses on the intensity of singular stress field (ISSF) at the end of interface since few research is available in terms of ISSF. Previously, the authors considered the JIS specimen assuming a plane strain. However, since the hearth roll is cylindrical and axi‐symmetric, the difference between plane strain and axi‐symmetric models should be clarified. Thus, in this paper, the axi‐symmetric model is newly considered and the optimum design is discussed by varying the coating material and the coating thickness. Also the present results are compared with the previous results of JIS specimen so that the difference between actual model and JIS specimen can be clarified to contribute the design and evaluation of the real rolls.

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\frac{K_{normalσ}}{K_{normalσ}^{*}} = \frac{F_{σ} σ_{0} W^{1 - λ}}{F_{σ} σ_{0}^{*} W^{1 - λ}} = \frac{σ_{r, F E M} - σ_{0} - {\tilde{σ}}_{r}}{σ_{y}^{F E M *}}

…”

Section: Axi‐symmetric Analysis Methods For the Intensity Of Singular mentioning

confidence: 99%

Optimum Design of Ceramic Spray Coating Evaluated in Terms of Intensity of Singular Stress Field

Wang

Noda

Ueno

et al. 2016

steel research int.

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“…The value of singular index and can be determined from equation (6) [20][21][22]. Detail calculation of and in reference problem can be found in [17,18].…”

Section: Singular Stress Around Corner Ementioning

confidence: 99%

Intensity of singular stress fields of an embedded fibre under pull-out force

Chen

Zhang

Takaki

et al. 2018

IOP Conf. Ser.: Mater. Sci. Eng.

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Abstract. Previous experimental studies of fibre pull-out test show two dangerous points on the interface. Failure usually occurs at the bonded end of the fibre (Point A) or at the entry point on the surface of the matrix (Point E). Both points have different singular stress fields which causes crack initiation, crack propagation, and final failure. In this paper, intensity of singular stress fields (ISSF) at the fibre bonded end A and ISSF at the intersection point E of the fibre and the surface are discussed. The analysis method focuses on calculating the finite element method (FEM) stress radio by using a reference model and an unknown model. In the unknown model and the reference model, same FEM mesh pattern is applied. To analyse the ISSF at A, the body force method solution is used as the reference model. To analyse the ISSF at E, the reciprocal work contour integral method (RWCIM) solution is used as the reference model. Then, the two ISSFs are compared and discussed by varying the fibre embedded length . When is shorter, the singular stress at A is larger than the singular stress at E. When is longer, the singular stress at E is larger than the ISSF at A.

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“…Generally, the ISSF cannot be calculated directly by the finite element method (FEM) [5][6][7][8]. The authors proposed the method for calculating the ISSF easily and accurately by the FEM [3,4].…”

Section: Introductionmentioning

confidence: 99%

Evaluation of debonding strength of single lap joint by the intensity of singular stress field

Miyazaki

Noda

2017

J. Phys.: Conf. Ser.

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Intensity of singular stress fields causing interfacial debonding at the end of a fiber under pullout force and transverse tension

Cited by 21 publications

References 19 publications

Optimum Design of Ceramic Spray Coating Evaluated in Terms of Intensity of Singular Stress Field

Optimum Design of Ceramic Spray Coating Evaluated in Terms of Intensity of Singular Stress Field

Intensity of singular stress fields of an embedded fibre under pull-out force

Evaluation of debonding strength of single lap joint by the intensity of singular stress field

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