Stress concentration factors for pressurized elliptic crossbores in blocks

Badr, E. A.

doi:10.1016/j.ijpvp.2006.01.003

Cited by 14 publications

(10 citation statements)

References 10 publications

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“…As the tilt angle θ increases, circular holes become elliptic, the stress concentration factors decrease rapidly for 20° and become very close to zero for 40° and mainly negative for 60° degrees over the whole range of W/a and a 2 /a 1 . As mentioned earlier, the decrease in the stress concentration factors corroborates the results of Faupel and those found by Badr 1 for crossbores in cubical blocks.…”

Section: Numerical Analysis (Fea) For Elliptic Crossbores In Rectangusupporting

confidence: 91%

“…As mentioned earlier, stress concentrations arising from bore intersections in cubical blocks were investigated by Badr. 1 The results obtained in this study also corroborated Faupel's results regarding the reduction of the stress concentration factor when elliptical side holes are drilled instead of circular ones.…”

Section: Numerical Analysis (Fea) For Elliptic Crossbores In Rectangusupporting

confidence: 88%

“…Specifically, a comparison was made between the results obtained in this study and those found in an earlier study Badr. 1 The comparison showed that stress concentration factors in rectangular blocks are even lower than those found in cubical blocks. For θ = 40°, the results are significantly lower for W/a ≥2.5 over the whole range of a 2 /a 1 and are compressive for θ = 60° as shown in Figs.…”

Section: Numerical Analysis (Fea) For Elliptic Crossbores In Rectangumentioning

confidence: 97%

“…In the first part of this work, Badr 1 reported stress concentration factors for elliptic crossbores in cubical blocks and compared them with stress concentrations of circular crossbores originally investigated by Sorem et al 2 It was found that the presence of elliptic crossbores rather than circular ones significantly reduced the stress concentration at the intersection of the bores.…”

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confidence: 88%

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Stress Concentration Factors for Pressurized Elliptic Crossbores in Blocks-Part Ii-Effect of Block Geometry

Badr

2009

Experimental Techniques

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Section: Numerical Analysis (Fea) For Elliptic Crossbores In Rectangusupporting

confidence: 91%

Section: Numerical Analysis (Fea) For Elliptic Crossbores In Rectangusupporting

confidence: 88%

Section: Numerical Analysis (Fea) For Elliptic Crossbores In Rectangumentioning

confidence: 97%

mentioning

confidence: 88%

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Stress Concentration Factors for Pressurized Elliptic Crossbores in Blocks-Part Ii-Effect of Block Geometry

Badr

2009

Experimental Techniques

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“…Recently, a number of solutions have appeared to the SCF's in plates [19,20] thick cylinders [21], shells [22], valves [23], key-ways [24] rivets [25]. Since there remain no solutions available for the stress distributions in plates containing straight-sided, inclined slots, here we present time-honoured photoelastic analyses of their stress concentration factors.…”

Section: Resultsmentioning

confidence: 99%

Stress Concentrations for Slotted Plates in Bi-Axial Stress

Rees¹,

Bahai²

2012

ENG

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The photo-elastic method has been employed to determine stress concentration factor (SCF) for square plates containing holes and inclined slots when the plate edges are subjected to in-plane tension combined with compression. Analyses given of the isochromatic fringe pattern surrounding the hole provides the SCF conveniently. The model material is calibrated from the known solution to the stress raiser arising from a small circular hole in a plate placed under biaxial tension-compression. These results also compare well with a plane stress FE analysis. Consequently, photo-elasticity has enabled SCF's to be determined experimentally for a biaxial stress ratio, nominally equal to -4, in plates containing a long, thin slot arranged to be in alignment with each stress axis. The two, principal stresses lying along axes of symmetry in the region surrounding the notch are separated within each isochromatic fringe by the Kuske method [1]. FE provides a comparable full-field view in which contours of maximum shear stress may be identified with the isochromatic fringe pattern directly. The principal stress distributions referred to the plate axes show their maximum concentrations at the notch boundary. Here up to a fourfold magnification occurs in the greater of the two nominal stresses under loads applied to the plate edges. Thus, it is of importance to establish the manner in which the tangential stress is distributed around the slot boundary. Conveniently, it is shown how this distribution is also revealed from an isochromatic fringe pattern, within which lie the points of maximum tension and maximum compression.

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Miscellaneous Design Elements

Pilkey¹

1997

Peterson's Stress Concentration Factors

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Stress concentration factors for pressurized elliptic crossbores in blocks

Cited by 14 publications

References 10 publications

Stress Concentration Factors for Pressurized Elliptic Crossbores in Blocks-Part Ii-Effect of Block Geometry

Stress Concentration Factors for Pressurized Elliptic Crossbores in Blocks-Part Ii-Effect of Block Geometry

Stress Concentrations for Slotted Plates in Bi-Axial Stress

Miscellaneous Design Elements

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