Stress around square and rectangular cutouts in symmetric laminates

Rao, D. K.; Babu, M. Ramesh; Reddy, K. Raja Narender; Sunil, D.

doi:10.1016/j.compstruct.2010.04.010

Cited by 74 publications

(17 citation statements)

References 10 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The angle α is created by the principal directions of symmetry, as well as the loading direction. By solving basic equation 14which is characteristic by equation 15 We carry out the transformation of the complex parameters for different angles α and according to relations (16) we calculate σ /p. Results of the calculations for the observed materials are given in Tables 5 and 6, graphic representation σ /p for two mentioned basic cases is in Graphs 2a and 2c.…”

Section: Resultsmentioning

confidence: 99%

See 1 more Smart Citation

Stress concentration around circular and elliptic holes in wood laminates

Langová¹,

Beño²,

Luptáková³

et al. 2020

FME Transactions

View full text Add to dashboard Cite

This paper examines the effects of material natural anisotropy of wood on stress concentration surrounding circular and elliptic holes. A thin anisotropic plate of wood was loaded with a constant pressure in one direction. The relationships between the stress components on the edge of the elliptic and circular holes were derived. For unloaded holes, normal stress values in small areas perpendicular to the edge of the hole were calculated. When calculating stress intensity, the relationships between the direction of applied pressure and the principal directions of elastic symmetry in spruce, ash, poplar, and oak wood were investigated.

show abstract

Section: Resultsmentioning

confidence: 99%

“…It can be said that the stress distribution around constructional holes is affected, in particular, by the material properties [12], but also by aspects as: the shape of a used joint, the distance of fasteners from the edges of structural members as well as by structural member thickness [13][14][15][16][17].…”

Section: Introductionmentioning

confidence: 99%

Stress concentration around circular and elliptic holes in wood laminates

Langová¹,

Beño²,

Luptáková³

et al. 2020

FME Transactions

View full text Add to dashboard Cite

show abstract

“…where A j are determined by applying the boundary conditions in Eqs. (9) for the first step of the solution [8]. By using the potential function obtained in the first step, the membrane forces f x and f y and the normal bending moment m(s) can be calculated in the cutout boundary [17] and it is assumed that these loads are subjected to points located on the edge of a fictitious cutout.…”

Section: Analytical Solutionmentioning

confidence: 99%

“…Then, the boundary conditions in the second step can be obtained as below [17]: Similarly, by using Eqs. (9) and taking stress resultants and moment restants in terms of the potential functions related to the second step (ϕ j 2 (z j )), the membrane forces and the normal bending moment can be determined in terms of ϕ j 2 (z j ). By putting the obtained results in Eqs.…”

Section: Analytical Solutionmentioning

confidence: 99%

See 1 more Smart Citation

Studying the effect of different parameters on stress resultant and moments distribution around non‐circular cutouts in unsymmetric laminates

Savadkoohi

Jafari

2017

Z Angew Math Mech

View full text Add to dashboard Cite

In this study, using complex potential approach, the stress analysis of unsymmetric laminates with non-circular cutouts is examined. In this study, using an appropriate mapping function the solution of perforated unsymmetric laminate with a circular cutout is extended to calculate stress distribution around non-circular cutouts and the effect of some parameters such as lay-up, cutout orientation and bluntness of cutouts on the stress resultants and moment resultants around them is studied. The results obtained are presented for two different lay-ups [0/90] T and [45/-45] T . Finite element numerical solution is used to validate results obtained from the present analytical solution. The analytical solution is in conformity with the finite element solution. It is interesting to note that the unexpected results indicate that the stress resultants and moment resultants around circular cutout aren't less than other cutouts. Furthermore, if appropriate values are selected for bluntness and cutout orientation, the stress resultants and moments will be reduced in significant value.

show abstract

Strength degradation and fractographic analysis of carbon fiber reinforced polymer composite laminates with square / circular hole using scanning electron microscope micrographs

Gupta

Prusty

Ray

et al. 2020

J of Applied Polymer Sci

View full text Add to dashboard Cite

In this article, experimental study has been carried out to obtain comparative information intended for designing and assembly of structural components made of carbon fiber reinforced polymer (CFRP) composite. Investigation on tensile strength has been done on unidirectional CFRP composite laminates with hole. Effect of stacking sequence, hole size, and hole shape on tensile strength has been examined independently by open hole tensile (OHT) test. Reduction in OHT strength is observed when stacking sequence is changed from [0] 8 to [0/90] 2s and when the hole size is increased. However, OHT strength is noticed to get increased when hole shape is changed from circular to square. Laminates containing square shaped hole demonstrate less sensitiveness towards tensile strength and show negligible effect of stacking sequences on the normalized strength than the circular hole. Fractographic analysis figures out the failure mechanism of tested specimens by correlating their mechanical properties. SEM micrographs and data analysis reveal that axial splits and local delamination effectively blunt the stress concentration around the hole resulting in higher OHT strength and less notch sensitiveness towards tensile strength.

show abstract

Stress around square and rectangular cutouts in symmetric laminates

Cited by 74 publications

References 10 publications

Stress concentration around circular and elliptic holes in wood laminates

Stress concentration around circular and elliptic holes in wood laminates

Studying the effect of different parameters on stress resultant and moments distribution around non‐circular cutouts in unsymmetric laminates

Strength degradation and fractographic analysis of carbon fiber reinforced polymer composite laminates with square / circular hole using scanning electron microscope micrographs

Contact Info

Product

Resources

About