The Influence of the Boundary Conditions on Low‐Velocity Impact Composite Damage

Amaro, Ana M.; Reis, P.N.B.; Magalhães, A.G.; Moura, M.F.S.F. de

doi:10.1111/j.1475-1305.2008.00534.x

Cited by 46 publications

(28 citation statements)

References 25 publications

(32 reference statements)

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“…Representative load-time and energy-time curves of all tests are shown in Figure 2, and they are in good agreement with the literature [13,23,[26][27][28]. While Figure 2a represents the different curves obtained for the first impact on control samples and for the distances of 10 mm and 0 mm, Figure 2b shows the typical evolution of the curves for the control samples subjected to multi-impacts.…”

Section: Resultssupporting

confidence: 74%

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Effects of external patch configuration on repaired composite laminates subjected to multi-impacts

Coelho

Reis

Ferreira

et al. 2017

Composite Structures

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Please cite this article as: Santos, R.A.M., Reis, P.N.B., Santos, M.J., Coelho, C.A.C.P., Effect of distance between impact point and hole position on the impact fatigue strength of composite laminates, Composite Structures (2017), doi: http://dx.doi.org/10. 1016/j.compstruct.2017.02.045 This is a PDF file of an unedited manuscript that has been accepted for publication. As a service to our customers we are providing this early version of the manuscript. The manuscript will undergo copyediting, typesetting, and review of the resulting proof before it is published in its final form. Please note that during the production process errors may be discovered which could affect the content, and all legal disclaimers that apply to the journal pertain. In terms of multi-impacts, the damage severity is also very influenced by the distance. For small distances the damage progresses quickly, while three stages can be found for the control samples and for the distance of 20 mm. Effect of distance between impact

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Section: Resultssupporting

confidence: 74%

“…More details about the impact machine can be found in [26]. An impactor with a diameter of 10 mm and mass of 2.827 kg was used.…”

Section: Figurementioning

confidence: 99%

Effects of external patch configuration on repaired composite laminates subjected to multi-impacts

Coelho

Reis

Ferreira

et al. 2017

Composite Structures

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“…In most cases, interface elements with a bilinear cohesive law are placed between adjacent plies [128,209,211,[213][214][215][216][217][218][219][220][221][222][223][224][225][226][227][228]. A linear elastic phase is followed by a linear softening.…”

Section: Low Velocity Impactsmentioning

confidence: 99%

Cohesive zone models and impact damage predictions for composite structures

2015

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This article surveys existing cohesive zone models (CZM) and their use in numerical simulations for analysis impacts on composite structures and predicting the damage induced. These models are used for matrix cracks and delamination. The first part of article gives the required background on failure criteria for predicting the onset of delaminations, on fracture mechanics and the various types of CZM. The second part discusses applications of CZM to several types of impact problems with composite structures. Applications for these models to other problems are briefly mentioned at the end. CZM are now part of state of the art numerical simulations with progressive damage analysis.

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“…More details about the impact machine can be found in reference [24] . The impact tests were performed on 75 × 75 mm specimens obtained by centrally supporting 100 × 100 mm plates [ Figure 1(B)].…”

Section: Experimental Workmentioning

confidence: 99%

Influence of the specimen thickness on low velocity impact behavior of composites

Amaro¹,

Reis²,

Moura³

et al. 2012

Journal of Polymer Engineering

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In this work, the infl uence of specimen thickness on low velocity impact behavior of carbon-epoxy composite laminates is studied. Plates with different thicknesses were tested under low velocity impact using a hemispherical impactor. The internal damage was mainly constituted by delaminations which were evaluated through the inspection of the impacted plates by the ultrasonic C-scan technique. It was observed that delaminations increase with plate thickness. In order to better understand the physical phenomenon explaining this result, a progressive damage model was used to simulate composites behavior under low velocity impact. In this context, a three-dimensional numerical analysis considering interface fi nite elements, including a cohesive mixed-mode damage model, which allows simulating delaminations onset and growth between layers, was performed. Good agreement was obtained between experimental and numerical analysis, which validated the proposed procedure. In addition, the proposed numerical methodology allowed identifi cation of physical phenomena related to the infl uence of plate thickness on delamination size.

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The Influence of the Boundary Conditions on Low‐Velocity Impact Composite Damage

Cited by 46 publications

References 25 publications

Effects of external patch configuration on repaired composite laminates subjected to multi-impacts

Effects of external patch configuration on repaired composite laminates subjected to multi-impacts

Cohesive zone models and impact damage predictions for composite structures

Influence of the specimen thickness on low velocity impact behavior of composites

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