Stress singularity analysis in three-dimensional bonded structure

Koguchi, Hideo

doi:10.1016/s0020-7683(96)00028-5

Cited by 52 publications

(27 citation statements)

References 22 publications

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“…According to [Janzen 1992a;1992b;1997], the experimental results of Davidse et al [1962] cannot be uncritically accepted because their measurements are about three times greater than those obtained from bending and tensile tests. Though this difference was attributed to larger deformations in the bending and tensile tests, the anomaly needs to looked into with a deeper perspective.…”

Section: Resultsmentioning

confidence: 99%

“…For (α 2D = 0.4, β 2D = 0.2) and (α 2D = 0.3, β 2D = 0.2), it can be seen that the plots of the stress −σ θ θ / T against the dimensionless distance r/L in a log-log scale have significantly negative slopes due to the value of the stress intensity factors −L θ θ2 / T of the ln(r/L) term and −L θθ3 / T of the (ln(r/L)) 2 term in Equation (4). In previous papers [Koguchi 1997;Prukvilailert and Koguchi 2005], it was found that the stress intensity factors (L i jm , K i ja ) under tensile loading are proportional to the magnitude of the applied tensile stress, P, on the upper surface of three-dimensional joints, that is,…”

Section: Ementioning

confidence: 99%

“…Functionally graded materials (FGMs), a type of composite material produced by continuously varying the volume fractions in the thickness direction to obtain a predetermined profile, have received much attention recently because of the advantages of decreasing the mismatch in material properties and reducing residual and thermal stresses [Chung and Chi 2001;Lee and Erdogan 1994] 1997;Kesler et al 1997].…”

Section: Introductionmentioning

confidence: 99%

“…In the analysis, the interface must be divided using very fine meshes along the stress singularity lines, and hugely memory-and time-consuming procedures are required for accurate analysis. Then, Koguchi [1997] investigated the stress singularity in three-dimensional bonded joints using three-dimensional BEM based on Rongved's fundamental solutions. Rongved's fundamental solutions [Rongved 1955] satisfy boundary conditions at the interface.…”

Section: Introductionmentioning

confidence: 99%

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2007

JOMMS

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See inside back cover or http://www.jomms.org for submission guidelines.Regular subscription rate: $500 a year. It is established that upper and lower bounds predict results far apart from each other for the effective elastic properties of semicrystalline polymers such as polyethylene. This is manly due to the high anisotropy of the elastic properties of the crystals. Composite modeling has been used to predict intermediate results between the bounds. Here, we show the details of composite modeling based on a two phase inclusion (crystalline lamella and amorphous domain) as the local representative element of a semicrystalline polymer. Three approaches, two composite bounds, and a composite self-consistent model, are used to compute the overall elastic properties. Details of the development of these approaches are given in this paper. We find good agreement between results from these approaches and experimental results for polyethylene.

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Section: Resultsmentioning

confidence: 99%

Section: Ementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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2007

JOMMS

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Section: Introductionmentioning

confidence: 99%

Boundary element analysis of the stress field at the singularity lines in three-dimensional bonded joints under thermal loading

Prukvilailert

Koguchi

2007

JOMMS

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The stress distribution near a point on the stress singularity line of dissimilar materials in three-dimensional joints under thermal loading are investigated using BEM based on Rongved's fundamental solutions. Stress distributions for the material combinations in the singularity region, in the no singularity region, and in the boundary between them on the Dundurs composite plane are investigated. The influences of thermal expansion coefficients, loading conditions and dimensions on the stress distribution in three-dimensional joints composed of two blocks are examined. The stress intensity factors in threedimensional joints under a uniform change in temperature are proportional to the temperature variation, T , and depend on the difference in the thermal expansion coefficients. Furthermore, the level of the stress distributions around the stress singularity lines also increases significantly as the length of one side in the parallel cross section to the interface decreases.

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2017

Handbook of Structural Life Assessment

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Stress singularity analysis in three-dimensional bonded structure

Cited by 52 publications

References 22 publications

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Boundary element analysis of the stress field at the singularity lines in three-dimensional bonded joints under thermal loading

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