Residual strength of composites with multiple impact damage

Jones, Rhys

doi:10.1016/0263-8223(94)90117-1

Cited by 9 publications

(2 citation statements)

References 22 publications

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“…Figure 6 plots these data relatively to the performance of corresponding as-molded materials (see Table 1). Figure 6 confirms the deleterious effect of previous fatigue in degrading the tensile stiffness of tape-reinforced laminates, which can be manly credited to fiber fracture [7][8][9][10][11][12][13][14][15][16][17] .…”

Section: Fatigue Testsmentioning

confidence: 53%

Mechanical performance of carbon-epoxy laminates. Part II: quasi-static and fatigue tensile properties

et al. 2006

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In Part II of this work, quasi-static tensile properties of four aeronautical grade carbon-epoxy composite laminates, in both the as-received and pre-fatigued states, have been determined and compared. Quasi-static mechanical properties assessed were tensile strength and stiffness, tenacity (toughness) at the maximum load and for a 50% load drop-off. In general, as-molded unidirectional cross-ply carbon fiber (tape) reinforcements impregnated with either standard or rubber-toughened epoxy resin exhibited the maximum performance. The materials also displayed a significant tenacification (toughening) after exposed to cyclic loading, resulting from the increased stress (the so-called wear-in phenomenon) and/or strain at the maximum load capacity of the specimens. With no exceptions, two-dimensional woven textile (fabric) pre-forms fractured catastrophically under identical cyclic loading conditions imposed to the fiber tape architecture, thus preventing their residual properties from being determined

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Section: Fatigue Testsmentioning

confidence: 53%

Mechanical performance of carbon-epoxy laminates. Part II: quasi-static and fatigue tensile properties

et al. 2006

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“…Jone et al. 22 performed an experimental method to determine the residual strength of graphite/epoxy laminated composite subjected to multiple impacts. They presented a repair methodology on the damaged composite structures.…”

Section: Introductionmentioning

confidence: 99%

Dynamic response of laminated composite beam reinforced with shape memory alloy wires subjected to low velocity impact of multiple masses

Khalili

Saeedi

2017

Journal of Composite Materials

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The response of laminated hybrid composite beam with embedded shape memory alloy wires subjected to impact of multiple masses is analytically investigated. Two degree of freedom spring-mass system and Fourier series are used in order to study the low velocity impact phenomenon on the resulting hybrid composite beam. A linearized contact law is chosen to calculate the contact force history. The effect of pseudo elasticity of wires as well as the recovery stresses generated in shape memory alloy wires due to shape memory effect is investigated. The beam is subjected to impactors with various masses, radii, and initial velocities. Impacts are occurred on the top and/or bottom surface of the beam. The effects of volume fraction of shape memory alloy wires, location of embedded wires, location of impacts and pre-strain in shape memory alloy wires on the contact force history and the deflection curve of the beam are investigated. The obtained results illustrated that embedding shape memory alloy wires in the laminated composite beam caused the deflection of the beam to occur more local at the points of impact, in comparison with the beams without shape memory alloy wires. Moreover, embedding 0.2 volume fraction of the shape memory alloy wires reduced the maximum deflection of the beam subjected to impact of 2 impactor masses by 57% and 3 impactor masses (on both sides) by 12%. Pre-straining the wires caused more reduction in deflection of the beam under impact loading.

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Impact Response of Laminated and Sandwich Composites

Vaidya

2011

CISM International Centre for Mechanical Sciences

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Residual strength of composites with multiple impact damage

Cited by 9 publications

References 22 publications

Mechanical performance of carbon-epoxy laminates. Part II: quasi-static and fatigue tensile properties

Mechanical performance of carbon-epoxy laminates. Part II: quasi-static and fatigue tensile properties

Dynamic response of laminated composite beam reinforced with shape memory alloy wires subjected to low velocity impact of multiple masses

Impact Response of Laminated and Sandwich Composites

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