Low-velocity impact analysis of composite laminates under initial in-plane load

Choi, Ik-Hyeon

doi:10.1016/j.compstruct.2008.03.042

Cited by 61 publications

(28 citation statements)

References 9 publications

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“…Analytical investigations were performed by Sun and Chattopadhyay [2], Malekzadeh et al [3], Khalili et al [4] and Choi [5]. They all come to the conform results that under tensile preloading the contact force is increased and the contact time as well as the deflection are reduced compared to the impacted unloaded plate.…”

Section: A C C E P T E D Article In Pressmentioning

confidence: 98%

Low velocity impact on CFRP plates with compressive preload: Test and modelling

Heimbs¹,

Heller²,

Middendorf³

et al. 2009

International Journal of Impact Engineering

190

111

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When laminated composite materials in modern aircraft structures are subject to impact loads, they are typically not unloaded but under a certain state of prestress. Therefore, in this study the effect of a compressive preload on the low velocity impact behaviour of three different carbon fibre-reinforced plastic (CFRP) materials is investigated. An experimental test programme is documented first, including the design of a preload test device, the specimen manufacture and the results description. An increased deflection and energy absorption for composite plates with a preload of 80% of the buckling load could be observed. Non-destructive inspections showed a large extent of delaminations occurring between individual plies, being an important energy absorption mechanism. The development of numerical simulation methods for this impact scenario using the commercial explicit finite element code LS-DYNA is described in detail. The focus is on the composite material, delamination and preload modelling. The final simulation results showed a good correlation to the experimental data in terms of force and energy plots or the evaluated interlaminar and intralaminar damage, although these numerical results proved to be strongly influenced by simulation parameters like mesh size or the number of shell element layers.

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Section: A C C E P T E D Article In Pressmentioning

confidence: 98%

Low velocity impact on CFRP plates with compressive preload: Test and modelling

Heimbs¹,

Heller²,

Middendorf³

et al. 2009

International Journal of Impact Engineering

190

111

View full text Add to dashboard Cite

show abstract

“…Some investigations on the dynamic response of prestressed composite structures under low-velocity transverse impact loadings can be found in literature [9][10][11][12][13]. Robb et al [9] carried out the first experimental investigation on the low-velocity impact response of E-Glass reinforced/polyester laminated plates under different in-plane uni-axial and biaxial pre-stress.…”

Section: Introductionmentioning

confidence: 99%

“…An increase in deflection and energy absorption was observed under a pre-load of 80% of the buckling load. Sun et al [12] and Choi [13] analytically investigated the effects of pre-stress on the dynamic response of composite laminates. They found that the initial in-plane tensile load increased the peak contact force while reducing the total contact duration and deflection.…”

Section: Introductionmentioning

confidence: 99%

Blast Performance of Sandwich Composites with In-Plane Compressive Loading

Wang

Shukla

2011

Exp Mech

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An experimental investigation was conducted to evaluate the dynamic performance of E-glass Vinyl Ester composite face sheet / foam core sandwich panels when subjected to pre-compression and subsequent blast loading. The sandwich panels were subjected to 0 kN, 15 kN and 25 kN of in plane compression respectively, prior to transverse blast wave loading with peak incident pressure of 1 MPa and velocity of 3 Mach. The blast loading was generated using a shock tube facility. During the experiments, a high-speed photographic system utilizing three digital cameras was used to acquire the real-time 3-D deformation of the sandwich panels. The 3D Digital Image Correlation (DIC) technique was used to quantify the back face out-of-plane deflection and in-plane strain. The results showed that in-plane compressive loading facilitated buckling and failure in the front face sheet. This mechanism greatly reduced the blast resistance of sandwich composites.

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“…An increased deflection and energy absorption was observed under a pre-load of 80% of the buckling load. Sun et al [3] and Choi [4] analytically investigated the effects of pre-stress on the dynamic response of composite laminates. They found that the initial in-plane tensile load increased the peak contact force while reducing the total contact duration and deflection.…”

Section: Introductionmentioning

confidence: 99%

Performance of Pre-Stressed Sandwich Composites Subjected to Shock Wave Loading

Wang

Shukla

2010

EPJ Web of Conferences

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Abstract. The present paper experimentally studies the dynamic behaviour of prestressed sandwich composites under blast loading. The in-plane static compression loadings are implemented on the sandwich composites before they are subjected to the transverse shock wave loading. Three different pre-stress levels are chosen. 3-D realtime deformation data are captured by two high-speed photography systems: a backview Digital Image Correlation (DIC) system and a side-view camera system. The results show that pre-stresses can induce local buckling in the front face-sheet of sandwich composites, consequently reduce the blast resistance of sandwich composites.

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Low-velocity impact analysis of composite laminates under initial in-plane load

Cited by 61 publications

References 9 publications

Low velocity impact on CFRP plates with compressive preload: Test and modelling

Low velocity impact on CFRP plates with compressive preload: Test and modelling

Blast Performance of Sandwich Composites with In-Plane Compressive Loading

Performance of Pre-Stressed Sandwich Composites Subjected to Shock Wave Loading

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