Analysis of Damage in Hybrid Composites Subjected to Ballistic Impacts: An Integrated Non‐Destructive Approach

Сфарра, Стефано; López, Fernando; Sarasini, Fabrizio; Tirillò, Jacopo; Ferrante, Luca; Perilli, Stefano; Ibarra-Castanedo, Clemente; Paoletti, Domenica; Lampani,; Barbero, Ever J.; Sánchez-Sáez,; Maldague, Xavier

doi:10.1002/9781119441632.ch47

Cited by 9 publications

(10 citation statements)

References 69 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…BCa shows complex SNR values for the analysis since the structure is intercalated. A finite element analysis should contribute to the understanding of thermal behavior of basalt-carbon hybrid laminates [31].…”

Section: Experimental Results and Analysismentioning

confidence: 99%

“…This is of particular interest with a view to correlating the damage and its extension with the residual properties of composite laminates. A simulation using the finite element method (FEM) may contribute to the further understanding of sandwich-like and alternating stacked structural characteristics subjected to known velocities of impact [31].…”

Section: Experimental Results and Analysismentioning

confidence: 99%

See 1 more Smart Citation

Optical and Mechanical Excitation Thermography for Impact Response in Basalt-Carbon Hybrid Fiber-Reinforced Composite Laminates

Zhang

Сфарра

Sarasini

et al. 2018

IEEE Trans. Ind. Inf.

View full text Add to dashboard Cite

In this paper, optical and mechanical excitation thermography were used to investigate basalt fiber reinforced polymer (BFRP), carbon fiber reinforced polymer (CFRP) and basalt-carbon fiber hybrid specimens subjected to impact loading. Interestingly, two different hybrid structures including sandwichlike and intercalated stacking sequence were used. Pulsed phase thermography (PPT), principal component thermography (PCT) and partial least squares thermography (PLST) were used to process the thermographic data. X-ray computed tomography (CT) was used for validation. In addition, signal-to-noise ratio (SNR) analysis was used as a means of quantitatively comparing the thermographic results. Of particular interest, the depth information linked to Loadings in PLST was estimated for the first time. Finally, a reference was provided for taking advantage of different hybrids in view of special industrial applications.

show abstract

Section: Experimental Results and Analysismentioning

confidence: 99%

Section: Experimental Results and Analysismentioning

confidence: 99%

Optical and Mechanical Excitation Thermography for Impact Response in Basalt-Carbon Hybrid Fiber-Reinforced Composite Laminates

Zhang

Сфарра

Sarasini

et al. 2018

IEEE Trans. Ind. Inf.

View full text Add to dashboard Cite

show abstract

“…2), that worked at +100 °C / -70 °C during three complete cycles, thanks to the use of the Canny edge detector implemented into a Matlab ® script written ad hoc in order to satisfy the purpose [20] .…”

Section: Discussionmentioning

confidence: 99%

Basalt fibre laminates non-destructively inspected after low-velocity impacts

Сфарра¹,

Ibarra-Castanedo²,

Sarasini³

et al. 2016

FME Transaction

Self Cite

View full text Add to dashboard Cite

In this work, the use of advanced thermographic techniques for the post-impact defect detection in basalt fibre reinforced composite laminates was investigated. The laminates were previously impacted at different energies, namely 7.5, 15 and 22.5 J and then subjected to accelerated environmental aging or to a coating process in order to conceal the previous damage due to low velocity impact. In both cases the defects could be identified using infrared thermography in the mid-wave infrared (MWIR) spectrum even after the treatments. In addition, short-wave infrared (SWIR) results were employed with the aim to clearly identify unsuspected resin-rich areas. Therefore, the non-thermal part of the infrared spectrum (SWIR) can be coupled with the thermal part (MWIR) providing a complete infrared vision beyond what is perceptible to the naked eye, i.e., in the visible spectrum.

show abstract

“…In this framework, the aim of the present study was to develop and assess the mechanical properties in both quasi-static and dynamic conditions (low velocity impact) of a particleboard made from sugarcane bagasse and a bio-resin derived from castor oil. None of the research works on particleboards investigated the modelling of the impact [25], [26], nor the evaluation of satellite defects [27] caused by the impact itself via thermographic [28], [29] and speckle analyses [30]. However, it has been proven that a combination of the above-mentioned techniques is very useful for the evaluation of the post-impact damage [31], [32], [33].…”

Section: Introductionmentioning

confidence: 99%

Impact Modelling and A Posteriori Non-destructive Evaluation of Homogeneous Particleboards of Sugarcane Bagasse

et al. 2018

View full text Add to dashboard Cite

With a view to gaining an in-depth assessment of the response of particleboards to different inservice loading conditions, samples of high-density homogeneous particleboards of sugarcane bagasse (SCB) and castor oil polyurethane resin were manufactured and subjected to low velocity impacts using an instrumented drop weight impact tower and four different energy levels, namely 5, 10, 20 and 30 J. The prediction of the damage modes was assessed using Comsol Multiphysics ®. In particular, the random distribution of the fibres and their lengths were reproduced through a robust model. The experimentally obtained dent depths due to the impactor were compared with the ones numerically simulated showing good agreement. The post-impact damage was evaluated by a simultaneous system of image acquisitions coming from two different sensors. In particular, thermograms were recorded during the heating up and cooling down phases, while the specklegrams were gathered one at room temperature (as reference) and the remaining during the cooling down phase. On one hand, the specklegrams were processed via a new software package named Ncorr v.1.2, which is an open-source subset-based 2D digital image correlation (DIC) package that combines modern DIC algorithms proposed in the literature with additional enhancements. On the other hand, the thermographic results linked to a square pulse were compared with those coming from the laser line thermography (LLT) technique that heats a line-region on the surface of the sample instead of a spot. Surprisingly, both the vibrothermography (VT) and the line scanning thermography (LST) methods coupled with a robotized system show substantial advantages in the defect detection around the impacted zone.

show abstract

Analysis of Damage in Hybrid Composites Subjected to Ballistic Impacts: An Integrated Non‐Destructive Approach

Cited by 9 publications

References 69 publications

Optical and Mechanical Excitation Thermography for Impact Response in Basalt-Carbon Hybrid Fiber-Reinforced Composite Laminates

Optical and Mechanical Excitation Thermography for Impact Response in Basalt-Carbon Hybrid Fiber-Reinforced Composite Laminates

Basalt fibre laminates non-destructively inspected after low-velocity impacts

Impact Modelling and A Posteriori Non-destructive Evaluation of Homogeneous Particleboards of Sugarcane Bagasse

Contact Info

Product

Resources

About