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compressive response and failure of balsa service life

  • Compressive response and failure of balsa wood -

    2007-12-15 · Like all woods, balsa wood has its own cellular microstructure shown in the micrograph in Fig. 1a. The main cells, known as tracheids, are long bean pod shaped, aligned axially along the trunk of the tree.Their main function is structural support (see Figs. 1b and 2a and b; see also Core et al. (1976)).Measurements of cell dimensions conducted on balsa wood specimens of three different ...

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  • Compressive response and failure of balsa wood -

    2007-12-15 · Compressive response and failure of balsa wood. Author links open overlay panel Andre Da Silva ... open archive. Abstract. Balsa wood is a natural cellular material with excellent stiffness-to-weight and strength-to-weight ratios as well as superior energy absorption characteristics. ... We use cookies to help provide and enhance our service ...

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  • Compressive response and failure of balsa wood

    Silva and Kyriakides [5] evaluated the compressive response and failure behavior of balsa wood based on its microstructure and found that the internal structure of balsa wood was composed of ...

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  • Compressive response and failure of balsa wood - CORE

    Compressive response and failure of balsa wood . By Andre Da Silva and Stelios Kyriakides. Cite . BibTex; Full citation Publisher: Elsevier BV. Year: 2007. DOI ... CORE is a not-for-profit service delivered by the Open University and Jisc. ...

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  • Dynamic response and energy dissipation

    Vural & Ravichandran (2003) studied the dynamic compressive response of balsa wood (a naturally occurring cellular material) along the grain direction using a modified split Hopkinson pressure bar ...

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  • Experimental and Analytical Analysis of Mechanical ...

    The results indicate that compressive strength of balsa wood increases with relative density though the rate of increase is significantly larger at high strain rates. The failure of low-density specimens is governed by elastic and/or plastic buckling, while kink band formation and end-cap collapse dominate in higher density balsa specimens.

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  • Compressive response and failure of fiber reinforced ...

    Compressive response and failure of fiber reinforced unidirectional composites S.H. LEE and ANTHONY M. WAAS University of Michigan, Department of Aerospace Engineering, MI 48109-2140, Ann Arbor, U.S.A. Received 28 December, 1998; accepted in revised form 15 July 1999 Abstract. The compressive response of polymer matrix fiber reinforced ...

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  • Modeling Compressive Skin Failure of Sandwich

    The failure modes of sandwich beams with Balsa core are analyzed.The sandwich beams fail in several modes including the core shearing,the tensile/compressive failure of face sheet and the face sheet bulking.The tests demonstrate that the capacity of

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  • Synthesis and Compressive Response of Microcellular

    2008-5-1 · The model is tested for sandwich composite materials with combustible glass vinyl ester skins and balsa core. Experimental fire tests are performed on the sandwich composites under combined compressive loading and one-sided heating at constant heat flux levels between 10 kW/m 2 (T max · 250°C) and 50 kW/m 2 (·600°C). The model predicts ...

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  • Low-velocity impact, bending, and compression

    2020-4-1 · The e-mail addresses that you supply to use this service will not be used for any other purpose without your consent. ... Three core materials were selected: Balsa wood, PVC foam, and Ayous wood. The facesheets of sandwich composites were produced by woven carbon/epoxy. ... S. Compressive response and failure of balsa wood. Int J Solids Struct ...

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  • Transient Dynamic Response and Failure of Sandwich ...

    2012-2-8 · The objective of this study is to examine the Fluid Structure Interaction (FSI) effect on transient dynamic response and failure of sandwich composite structures under impact loading. The primary sandwich composite used in this study consisted of a 6.35 mm balsa core and a multi-ply symmetrical plain weave 6 oz E-glass skin. Both clamped sandwich composite plates and beams were studied …

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  • 'Effect Of Impact Damage On Compression

    The aim of this research work was to investigate the effect of impact damage on in-plane buckling and compression-compression fatigue behavior for a new sandwich structure made from E-glass/epoxy face sheets over end-grain balsa wood core. Low velocity impact tests were carried out using a drop-weight impact tower by impacting the sandwich beam at the center with energy level slightly higher ...

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  • Modeling Compressive Skin Failure of Sandwich

    2018-3-3 · The model is tested for sandwich composite materials with combustible glass vinyl ester skins and balsa core. Experimental fire tests are performed on the sandwich composites under combined compressive loading and one-sided heating at constant heat flux levels between 10 kW/m 2 (T max · 250°C) and 50 kW/m 2 (·600°C). The model predicts ...

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  • Dynamic Compressive Response and Failure Behavior

    2018-2-5 · The high-strain-rate compressive behavior of an epoxy syntactic foam is examined in this study. A pulse-shaped split Hopkinson pressure bar (SHPB), modified for low-impedance material testing, was used to ensure that the samples deformed under dynamic equilibrium and …

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  • In-plane Compressive Response of Sandwich Panels -

    The in-plane compressive response of sandwich panels is investigated in this thesis, with the objective to develop a methodology capable of determining if the structural response is likely to be favourable in an energy absorption perspective. Experiments were conducted to identify possible initial failure …

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  • Experimental characterization of a novel balsa cored ...

    2018-12-7 · Balsa cored sandwich structures with fiber-reinforced polymer (FRP) skins are widely used to produce lightweight, high-stiffness and cost-effective structural components used in marine applications. However, balsa is a hydrophilic material, which is severely susceptible to moisture attacks. Unintended water penetration from the damaged FRP skins into the balsa cored sandwich structures can ...

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  • Materials | Free Full-Text | On the Compressive

    This paper presents a series of compression tests performed on a variety of high performance lightweight cellular materials conventionally used in energy absorption applications. Compressive tests were performed over a range of strain rates with a universal testing machine and a single stage gas gun. Experimental results revealed a dependency of the mechanical properties on the polymeric ...

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  • Mechanical behavior and failure of composite

    Xiong et al. [6] involved the failure behavior in pyramidal truss sandwich panel subject to edge compressive by experimental tests, and listed as three different failure modes, such as face sheet ...

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  • Compressive properties of reversibly assembled lattice ...

    2020-11-11 · The compressive properties of unit cell lattice structures assembled with different connections pins and sequences were investigated. Lattices with steel pins possess higher compressive modulus and strength than those with composites pins.

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  • Shear mechanical characterization of balsa wood as

    The tensile, compressive and shear behavior of standardized specimens cut from a veneered balsa wood used as structural sandwich core was investigated at ambient temperatures of up to 250 °C.

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  • Variables affecting the strength of balsa wood |

    Abstract Tests have been carried out to determine the strength of balsa wood and its variation with density. Particular attention is paid to the tensile strength of balsa loaded at different angles to the grain and a simple theory of failure is derived from the results. The compressive strength and modulus of elasticity are also reported. Similarities between the mechanical behaviour of balsa ...

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  • Experimental characterization of a novel balsa cored ...

    2018-12-7 · Balsa cored sandwich structures with fiber-reinforced polymer (FRP) skins are widely used to produce lightweight, high-stiffness and cost-effective structural components used in marine applications. However, balsa is a hydrophilic material, which is severely susceptible to moisture attacks. Unintended water penetration from the damaged FRP skins into the balsa cored sandwich structures can ...

    Get Price
  • Dynamic failure of sandwich beams with fluid-structure ...

    2016-7-5 · Figure 8. Failure force verses crosshead speed (untreated balsa) .....21 Figure 9. Medium has no effect of failure load but increasing strain rate increases ultimate strength. (hot coated balsa…

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  • Vibration Response and Cumulative Fatigue Damage

    Overlapped subway shield tunnels are subjected to the dynamic impacts caused by running trains and are damaged during their long-term service life. In this paper, the dynamic response and cumulative damage evolution of the overlapped shield tunnels were numerically studied.

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  • Compressive strength after blast of sandwich

    After the blast events, the residual compressive load-bearing capacity is investigated experimentally, using appropriate loading conditions that an in-service vessel may have to sustain. Residual strength testing is well established for post-impact ballistic assessment, but there has been less research performed on the residual strength of ...

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  • Peridynamic Modeling of Compression After Impact

    2021-3-29 · The evolution from deformation to failure of HTPE propellants was recorded using a synchronized high-speed digital camera. Together with information from the stress–strain behavior and high speed images, the correlation between mechanical response and failure mode of HTPE propellants can be analyzed.

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  • High-strain-rate mechanical response of HTPE

    ( ) Ye S, Zhang CC, Zhang PY, Zhang XC*, Tu ST, Wang RZ, Fatigue life prediction of nickel-based GH4169 alloy on the basis of a multi-scale crack propagation approach, Engineering Fracture Mechanics, 2018; 199: 29-40.

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  • High-temperature mechanical properties and thermal ...

    2010-6-26 · Balsa is a core material used in sandwich composite structures for applications where fire is an ever-present risk, such as ships and buildings. This article investigates the thermal softening response of balsa with increasing temperature, and the thermal recovery behavior when softened balsa is cooled following heating.

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  • Marine Applications - Carbon-Core Corporation

    Failure modes in balsa-cored panels include contra-coup de-lamination where a plug of end-grain balsa is dislodged under the impact point, which pushes the opposite skin from the core. Rigid foams will demonstrate different failure modes, such as diagonal core ruptures or delaminations starting in the zone under the point of impact, where the ...

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  • Compressive behaviour of axially loaded spruce wood

    2010-5-20 · Read 'Compressive behaviour of axially loaded spruce wood under large deformations at different strain rates, European Journal of Wood and Wood Products' on DeepDyve, the largest online rental service for scholarly research with thousands of academic publications available at your fingertips.

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  • eOceanic

    'On the compressive response of carbon nanotube tangles', Physics Letters A, Vol 373, 2009, pp 3169-3173 2009 Conference publications Zenkert D. and Burman M., 'Failure Mode Shifts in Fatigue of Sandwich Beams', Proc. ICCM17, Edinburgh, 2009, Paper B6:7

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  • Review of annual progress of bridge engineering in

    2016-7-13 · This paper describes the influence of seawater ageing on composites used in a range of marine structures, from boats to tidal turbines. Accounting for environmental degradation is an essential element in the multi-scale modelling of composite materials but it requires reliable test data input.

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  • Lightweight Structures | KTH

    The growing environmental concerns have led to attention on bio-based composite materials, such as the natural fibres, recycled carbon fibres and bio-based resins. Herein, the bio-based epoxy composites were reinforced with ramie fibre (RF) and recycled carbon fibre (rCF) via inter-layer hybridisation. The dynamic mechanical analysis, tensile, flexural and impact properties characterisation ...

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  • Torso Flexion Loads and Fatigue Failure Mode of Human ...

    2020-4-20 · The effect of network structure on dynamic compressive fatigue behavior and static compressive mechanical properties of styrene-butadiene rubber (SBR) were investigated. A series of SBR compounds with different amounts of sulfur and dicumyl peroxide (DCP) were prepared, and their crosslinking densities were calculated using the Flory–Rehner equation.

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