Short-beam shear fatigue behavior of fiber metal laminate (Glare)

Kotik, Hector Guillermo; Ipiña, Juan E. Perez

doi:10.1016/j.ijfatigue.2016.11.001

Cited by 36 publications

(20 citation statements)

References 12 publications

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“…[ 6 ] So, relatively low interlaminar shear strength causes the failure when subjected to interlaminar shear stresses. [ 8 ] Therefore, there is an intense need to improve the interlaminar shear strength of FMLs to avoid delamination failure, which in fact largely influenced by the adhesion between the composite and the metallic layers. An efficient surface treatment (mechanical and/or chemical) of the metallic sheets is essential to guarantee the good interfacial bonding between composite/metal layers.…”

Section: Introductionmentioning

confidence: 99%

Experimental study on the improvement of mechanical properties of GLARE using nanofillers

El‐baky

Attia

2020

Polymer Composites

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The present study investigates the effect of halloysite clay nanotubes (HCNT S) on the mechanical properties of glass reinforced aluminum laminate (GLARE) as a very popular fiber metal laminate (FML). GLARE (3/2) with quasi-isotropic lay-up, [Al/[(0 /90)/(45 /−45)]s/Al/[(0 /90)/(45 /−45)]s/Al], filled with different wt% ofHCNTs (0, 0.25, 0.5, 1, 2, and 3 wt%) were fabricated using hand lay-up followed by compression molding. Tensile, flexural, and impact properties of the fabricated GLAREs were evaluated. The failure of the specimens was examined using field emissionscanning electron microscope (FE-SEM), energy-dispersive X-ray spectroscopy (EDX) and visual inspection. Test results demonstrated that the incorporation of HCNTs improves the mechanical properties of GLARE. Among the studied wt%, the inclusion of 1 wt% of HCNTs to GLARE leads to maximum improvements of 35.67%, 8.50%, 28.85%, 50.47%, 50.27%, 30.43%, and 51.52% in tensile strength, tensile strain, Young's modulus, modulus of toughness, flexural strength, flexural strain, and impact strength, respectively, was attained by adding 1 wt% of HCNTs to GLARE compared to pristine GLARE. Meanwhile, increasing HCNT S content to 3 wt% reverse the trend. FESEM showed that, HCNT S are well dispersed in epoxy. However, a higher weight fraction of HCNT S in epoxy, that is, 3 wt% leads little agglomerations.

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Section: Introductionmentioning

confidence: 99%

Experimental study on the improvement of mechanical properties of GLARE using nanofillers

El‐baky

Attia

2020

Polymer Composites

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“…Three main stages of fatigue are seen in this figure. According to Kotik and Ipina [4], the first stage is a transient in which the rate of maximum displacement decreases. In the second stage, which lasts for most of the life of the sample, a constant rate is observed.…”

Section: Resultsmentioning

confidence: 99%

“…Kotik and Ipiña [4] mentioned that curved samples submitted to beam loads are more susceptible to delamination. Similar behavior of fatigue curves of curved samples can be observed comparing with flat unidirectional carbon fiber/epoxy prepreg from Hexcel (IM7/8552) available in the literature [8].…”

Section: R-ratio Severity (%) Cycles R-ratiomentioning

confidence: 99%

“…Some authors have performed specific fatigue studies to understand the behavior of these structures. For instance, Kotik and Ipina [4] studied quasi-static and fatigue (R = 0.1; 5 Hz) interlaminar shear behavior of flat commercial FML (Glare 1 3/2) employing the shortbeam shear (SBS) test in longitudinal and transverse orientations. Ju et al [5] described that in laminated curved samples, delamination occurs more easily owing to the high peel stress in the curved region.…”

Section: Introductionmentioning

confidence: 99%

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Curved Pultruded Unidirectional Carbon Fiber Composite Under Interlaminar Shear Fatigue Loading

Tonatto¹,

Rodackievicz²,

Amico³

2018

Proceedings of the 4th Brazilian Conference on Composite Materials

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Curved pultrusion is a new variation of traditional pultrusion and it has been recently used to produce curved composite components. Due to their excellent mechanical properties, curved composites may be used in aerospace, automotive and naval sectors. However, little is known about their fatigue behavior. In the present work, a short beam shear test (SBS) set up has been used to evaluate fatigue strength of curved pultruded carbon fiber composite samples. A servo-hydraulic machine was used to apply a frequency of 5 Hz, and at 80, 70, 60 and 50% of the quasi-static strength. The tests were carried out for a stress ratio R of 0.1, and additional tests were performed for ratio R of 0.5. Damage evolution has been observed using the apparent stiffness method. S-N curves have been normalized and the experimental data has been fitted using Basquins' Law. Observed failure and limitations of the SBS test to characterize the interlaminar shear fatigue behavior for curved composites are described and discussed.

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“…Crack growth in interlayer of the structure could prevent the catastrophic fiber failure around the matrix crack. 33…”

Section: Introductionmentioning

confidence: 99%

Interlaminar shear properties of nanostitched/nanoprepreg aramid/phenolic composites by short beam method

Bilişik

Erdogan

Sapanci³

2018

Journal of Composite Materials

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The interlaminar shear strengths of nanostitched 3D aramid/phenolic composites were studied. Stitching slightly improved the interlaminar strength of the z-stitching/nanotube composites. In addition, the stitching fiber type influenced the interlaminar strength of the z-stitching/nanotube aramid/phenolic composites. The failures of all structures in the compression and tensile sides were almost negligible. However, all structures had interlaminar shear failure where delamination in z-stitching/nanotube composites was arrested. The introduction of the stitching yarn in the baseline structure improved its out-of-plane failure properties without reducing the in-plane properties. The effects of stitching and multiwall carbon nanotubes on the 3D aramid/phenolic composite were encouraging and the nanostitched para-aramid/phenolic nanocomposite could be considered as damage tolerance material.

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Short-beam shear fatigue behavior of fiber metal laminate (Glare)

Cited by 36 publications

References 12 publications

Experimental study on the improvement of mechanical properties of GLARE using nanofillers

Experimental study on the improvement of mechanical properties of GLARE using nanofillers

Curved Pultruded Unidirectional Carbon Fiber Composite Under Interlaminar Shear Fatigue Loading

Interlaminar shear properties of nanostitched/nanoprepreg aramid/phenolic composites by short beam method

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