Effect of temperature on stresses and delamination failure of z-pinned joints

Byrd, Larry W.; Birman, Victor

doi:10.1016/j.ijmecsci.2006.03.014

Cited by 8 publications

(2 citation statements)

References 18 publications

(25 reference statements)

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“…Other related studies on multilayered structures subjected to thermal loading focused on thermal stresses in relation to debonding, such as the work of Byrd and Birman [14], which examined the effect of temperature on debonding of z-pinned joints. Hsueh et al [15] studied mode-I edge debonding and, although unable to arrive at an exact analytical solution for peeling stresses, derived analytical expressions for the peeling moments.…”

Section: Introductionmentioning

confidence: 99%

On the Interaction of Thermally Induced Buckling and Debond Propagation in Patched Structures

Carabetta

Bottega

2012

Journal of Applied Mechanics

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The coupling of edge debonding and thermal buckling of patched beam-plates possessing initial edge detachment is examined for the case when the structure is subjected to a uniform temperature change. The geometrically nonlinear analytical model employed is that established by the authors in a prior work. The problem is recast in a mixed formulation in terms of the transverse deflection and the membrane force to aid in the analysis and physical interpretation. The interaction of edge-debond propagation and thermal buckling is studied. The phenomenon of buckle-trapping, originally obseii'ed by the authors in a congruent study, as well as the phenomenon of sling-shot buckling, is seen to manifest itself in the debonding behavior. The evolution of the structure is predicted as a function of given material and geometric parameters from numerical simulations based on analytical solutions of the nonlinear problem. A (propagating) contact zone adjacent to the bonded region is accounted for, and its presence or absence, as well as its nature, is seen to be highly influential in the global as well as local behavior of the structure.

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Section: Introductionmentioning

confidence: 99%

On the Interaction of Thermally Induced Buckling and Debond Propagation in Patched Structures

Carabetta

Bottega

2012

Journal of Applied Mechanics

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“…However, the joints often required for fitting composite parts usually constitute a region of weakness, which can lead to premature failure of structures. Based on the fact that the structural efficiency of a composite structure depends on its joints rather than the component members, the stresses associated with mechanical joining of composites has received much attention in recent years [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19][20]. Mechanical joining includes bolted, riveted, and pinned joints; these joints are prone to high stress concentration, which occurs in the vicinity of the hole, and are often the source of premature failure in composite structures containing joints.…”

Section: Introductionmentioning

confidence: 99%

The Failure Characterization of Composite Pinned Joints

Aluko

Moore

2014

Mechanics of Advanced Materials and Structures

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An analytic model was developed to predict the failure strength of pin loaded composite joints using a two-dimensional analysis. The characteristic dimensions, which define the characteristic curve, were obtained by stress analyses associated with no bearing and tensile tests on laminates with and without a hole. The available experimental data in the literature was then used to evaluate the joints' strength. There was a good agreement between the experimental data and the computed joints' strength. Additionally, the failure mode that characterizes the failure condition depends on the orientations of the laminas that constitute the laminate used for joint construction.

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Influence of Z‐pin material on the mechanical properties of fine Z‐pin reinforced composites

Ji,

Cheng,

Wang

et al. 2024

Polymer Composites

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The insertion of finer Z‐pins is an effective method to reduce the microstructure damage and maintain the in‐plane performance of composite laminates. In this paper, an ultrasound guided insertion process is proposed to achieve the insertion of fine Z‐pins and the influence of Z‐pin material on the mechanical properties of Ø0.11 mm Z‐pin reinforced composite laminates is revealed based on experiments and simulations. For in‐plane mechanical properties, stainless steel Z‐pins help to reduce the loss of compression modulus and compression strength. For the interlaminar mechanical properties, stainless steel Z‐pins and carbon fiber Z‐pins exhibit bilinear and trilinear bridging laws respectively, resulting in the mode‐I maximum load and fracture toughness of carbon fiber Z‐pin reinforced composites being greater than that of stainless steel Z‐pin reinforced composites. By adjusting the insertion spacing, it is found that for unidirectional composite laminates reinforced by Ø0.11 mm carbon fiber Z‐pins with an insertion spacing of 2 mm, the compression strength reduction is only 3.39% while the mode‐I fracture toughness can be improved by 14.4 times in comparison with the unpinned specimens, achieving a better balance between in‐plane performance loss and interlaminar reinforcement effect.Highlights The effect of Z‐pin material on fine Z‐pin reinforced composites is studied. The compression properties are simulated by the RVE model. The mode‐I fracture properties are simulated by the DCB unit strip model.

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Effect of temperature on stresses and delamination failure of z-pinned joints

Cited by 8 publications

References 18 publications

On the Interaction of Thermally Induced Buckling and Debond Propagation in Patched Structures

On the Interaction of Thermally Induced Buckling and Debond Propagation in Patched Structures

The Failure Characterization of Composite Pinned Joints

Influence of Z‐pin material on the mechanical properties of fine Z‐pin reinforced composites

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