Scaling of impact on low fibre-volume glass–polyester laminates

Sutherland, L.S.; Soares, C. Guedes

doi:10.1016/j.compositesa.2006.04.003

Cited by 24 publications

(10 citation statements)

References 22 publications

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“…The damage on the materials starts in this way causing the strength and rigidity of the composite materials to decrease, and this effect becomes even greater under relatively higher loads [25,[30][31][32][33][34]. Also, damage formation can take place on the back surface of the impacted object.…”

Section: Introductionmentioning

confidence: 99%

Investigation of the effect of surface crack on low-velocity impact response in hybrid laminated composite plates

Güneş

Şahi̇n

2020

J Braz. Soc. Mech. Sci. Eng.

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Composite materials can be damaged in the environments in which they are used, due to the loads they are exposed to or due to different effects on the production processes. The formation processes of these damages generally develop as crack formation or progress of the existing crack. For this reason, it is very important to investigate the behavior of the crack that occurs after the dynamic loads to which the composite materials are exposed. In this study, the dynamic behaviors of hybrid laminated composites with different surface crack geometries were investigated. Surface cracks with different crack depthto-thickness (a/t) and crack depth-to-crack width (a/c) ratios were machined upon hybrid composite laminates and subjected to low-velocity impact tests under 2 m/s, 2.5 m/s and 3 m/s impact velocities. The effect of different surface crack geometries upon variation of contact force versus time, variation of contact force versus displacement and variation of absorbed/rebound energy have been evaluated. The effect of surface crack geometry and impact velocity upon contact stiffness and bending stiffness was also evaluated. Damage formation during impact loading was examined by scanning electron microscopy and optical microscopy. After the evaluations, the damage behaviors caused by the dynamic loads depending on the initial surface crack geometry were examined in detail.

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Section: Introductionmentioning

confidence: 99%

Investigation of the effect of surface crack on low-velocity impact response in hybrid laminated composite plates

Güneş

Şahi̇n

2020

J Braz. Soc. Mech. Sci. Eng.

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“…In fact, impact may produce fracture and effects on strain rate that do not scale with geometry. The limits of geometrical scaling with dimensional analysis are highlighted by a series of works aimed to study the impact response of plates [134][135][136][137][138].…”

Section: Impact Responsementioning

confidence: 99%

“…Sutherland and Guedes Soares [136] investigate an orthotropic plate made of a marine composite material and struck by a mass. Buckingham's P theorem is used to derive the similitude conditions.…”

Section: Impact Responsementioning

confidence: 99%

A Review of Similitude Methods for Structural Engineering

Casaburo

Petrone

Franco

et al. 2019

Applied Mechanics Reviews

126

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Similitude theory allows engineers, through a set of tools known as similitude methods, to establish the necessary conditions to design a scaled (up or down) model of a full-scale prototype structure. In recent years, to overcome the obstacles associated with full-scale testing, such as cost and setup, research on similitude methods has grown and their application has expanded into many branches of engineering. The aim of this paper is to provide as comprehensive a review as possible about similitude methods applied to structural engineering and their limitations due to size effects, rate sensitivity phenomena, etc. After a brief historical introduction and a more in-depth analysis of the main methods, the paper focuses on similitude applications classified, first, by test article, then by engineering fields.

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“…[1] Fig 2:General methods of thickness scaling in FRP composite [2] The thickness of the laminate is more sensitive to damage due to impact and static loads. Varying the scaling method changes the ability of laminate to store energy and impact resistance [3] . The delamination area and back face cracking decreases with increase in specimen's area.…”

Section: Introductionmentioning

confidence: 99%

Size Scale Effects on Post-impact Residual Strength of Hybrid Glass/Carbon/Epoxy Nano-composites

Kavitha

Prakash

2014

Procedia Materials Science

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Understanding the material response to macroscopic scaling along the thickness direction in fiber-reinforced composite materials is important to reduce the effects of scaling-up during design. This paper presents the effect of size-scale of composites obtained through two methods of scaling: a) ply-level (0 gn /90 cn ) s and b) sub-laminate level (0 g /90 c ) ns where, (n= 2,3,4), on the residual strength and post-impact response. The strength parameters were determined with and without nano-clay addition (Nanomer 1.30E, clay surface modified with 25-30 wt% octa-decylamine). The hybrid glass/carbon/epoxy composite and nano-composite (1.5% nano-clay of weight of epoxy) specimens were prepared using compression molding technique. The ultimate tensile strength of thickness scaled composite and nano-composite specimen was examined. Impact tests were done at two velocities, viz., 4.49 m/s and 3.78 m/s for both thickness scaled composite specimens with and without nano-composite addition. It was observed that ply-level scaled laminates absorbs more impact energy compared to sub-laminate level scaled specimens. The residual tensile strength was found out by conducting tensile test on the impacted specimens. The reduction in residual strength is more in nano-composite specimens compared to plain-composite material. The damage developed in the ply-level scaled specimen is more compared to sub-laminate level scaled specimens.

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Scaling of impact on low fibre-volume glass–polyester laminates

Cited by 24 publications

References 22 publications

Investigation of the effect of surface crack on low-velocity impact response in hybrid laminated composite plates

Investigation of the effect of surface crack on low-velocity impact response in hybrid laminated composite plates

A Review of Similitude Methods for Structural Engineering

Size Scale Effects on Post-impact Residual Strength of Hybrid Glass/Carbon/Epoxy Nano-composites

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