Effect of fibre orientation on stress concentration in a unidirectional tensile laminate of finite width with a central circular hole

Shastry, B.P.; Rao, G. Venkateswara

doi:10.1016/0015-0568(77)90015-x

Cited by 9 publications

(9 citation statements)

References 1 publication

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“…Fiber orientation effect on stress concentration in a unidirectional finite width laminate with a circular hole was studied by [8]. It was found that stress concentration is maximum when the fibers are aligned in the loading direction and minimum when the fibers are aligned in 45 ∘ to the loading direction.…”

Section: Matrix Rich Regionmentioning

confidence: 99%

Stress and Strain Concentration Factors in Orthotropic Composites with Hole under Uniaxial Tension

Ray-Chaudhuri

Chawla

2018

Curved and Layered Structures

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A systematic investigation is carried out on how different parameters influence stress and strain concentration factors (SCF and SNCF) in a composite plate with a hole under uniaxial tension. Flat and singly curved composite plates have been modelled in ANSYS 15.0. The governing parameter includes: (i) size, shape and eccentricity of hole, (ii) number of plies, (v) fiber orientation and (vi) plate curvature. It is observed that different parameters influence the SCF and SNCF with varying degrees. For example, SCF may be as high as 7.16 for a square shaped hole. Also, SCF and SNCF are found to be approximately same in most of the cases. Finally, simplified design formulas are developed for evaluation of SCF for a wide range of hole size, eccentricity and fiber orientation.

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Section: Matrix Rich Regionmentioning

confidence: 99%

Stress and Strain Concentration Factors in Orthotropic Composites with Hole under Uniaxial Tension

Ray-Chaudhuri

Chawla

2018

Curved and Layered Structures

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“…In figures (4, 5) when there is no hole in the piece ,(plate A), note that when Isotropic is used the value of Von Mises stress is not more than (5) MPa but (under the same conditions) on the other hand when Orthotropic is used the stress will be (3.71) MPa. In figures (6,7), when (D / Y = 0.5) it can be noticed that the value of Von Mises stress changed from (5.18) to (4.23) MPa, whereas in figures (8,9) at (D / Y = 0.9) the value of Von Mises stress decreased from (5.82) to (4.87) MPa.…”

mentioning

confidence: 92%

“…Paul and Rao [6,7] presented a theory for evaluation of stress concentration factor of thick and FRP laminated plate with the help of Lo Christensen-Wu higher order bending theory under transverse loading. Shastry and Raj [8] have analyzed the effect of fiber orientation for a unidirectional composite laminate with finite element method by assuming a plane stress problem under in plane static loading. Xiwu et al [9,10] evaluated stress concentration of finite composite laminates with elliptical hole and multiple elliptical holes based on classical laminated plate theory.…”

Section: Introductionmentioning

confidence: 99%

Comparison the stresses and deflections of an isotropic and orthotropic rectangular plates with central circular hole under tension load

Abdullah¹

2012

(AREJ)

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The distributions of stresses and deflection in rectangular isotropic and orthotropic plates with central circular hole under transverse static loading have been studied using finite element method. The object of this present work is to analyze the effect of D/Y ratio (where D is hole diameter and Y is plate width) upon stress distribution and deflection in plates under tension subjected to a static loading. The D/Y ratio is varied from (0.1) to (0.9). The results are obtained for four different boundary conditions. The variations of stresses and deflections with respect to D/Y ratio are presented in graphical form. The finite element formulation is carried out by using the analysis section of the ANSYS package

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“…But, many studies conducted by other researchers contradicted this finding. Shastry and Rao 9 found that for finite plates, the SCF increased with an increase in diameter. Prabhakaran 10 also indicated the influence of a ‘hole-size effect’, which he defined as the reduction in strength of composites due to an increase in hole-size or hole diameter.…”

Section: Introductionmentioning

confidence: 98%

A review of stress concentration studies on fibre composite panels with holes/cutouts

Kumar¹,

Rajesh²,

Pugazhendhi

2020

Proceedings of the Institution of Mechanical Engineers, Part L:

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Composite panels are widely used as structural members due to their high strength-to-weight ratio. In order to reduce further weight, cutouts or notches are introduced in these members. These cutouts also serve utility requirements such as man-holes for purpose of service as well as for passing electric or fuel lines. An aircraft wing rib is a typical example of such a composite panel. Even while composites with holes or cutouts provide great savings in weight compared to metallic structures, the presence of holes itself leads to strength reduction. The reduction in strength is due to the concentration of stress around the vicinity of the hole while the structure is under loading. Different-sized and shaped holes/cut-outs are used in composites structural members, which may serve for different purposes. They, in turn, introduce their own versions of stress concentrations effects in such members leading to weakening of the structure. The stress concentration effect in fibre composites also depends on other factors like fibre orientation, fibre material, matrix material, etc. Loading can also influence stress concentration. This review pursues vast research done in this area and attempts to compare and summarise the diverse findings for designers to obtain a comprehensive concept on stress concentration factor as an effective tool for composite structure design.

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Effect of fibre orientation on stress concentration in a unidirectional tensile laminate of finite width with a central circular hole

Cited by 9 publications

References 1 publication

Stress and Strain Concentration Factors in Orthotropic Composites with Hole under Uniaxial Tension

Stress and Strain Concentration Factors in Orthotropic Composites with Hole under Uniaxial Tension

Comparison the stresses and deflections of an isotropic and orthotropic rectangular plates with central circular hole under tension load

A review of stress concentration studies on fibre composite panels with holes/cutouts

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