Influence of various damage mechanisms on the low‐velocity impact response of composite laminates

Zou, Xionghui; Gao, Weicheng; Xi, Wei

doi:10.1002/pc.27810

Cited by 3 publications

(1 citation statement)

References 46 publications

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“…Based on results obtained in the energy dissipation mechanism, it was evident that thinner laminates were better energy absorbent than thicker laminate [27]. Thus, multilayer thin CFRP laminates consisting of 1mm thickness were placed 1mm apart (HYB-1) is studied (Figure 5).…”

Section: Optimise Laminate Configuration and Projectile Size Effectmentioning

confidence: 99%

A numerical analysis of CFRP laminate behaviour under high-velocity impact

Ghosh,

Ramajeyathilagam

2024

E3S Web Conf.

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This work focuses on the numerical investigation of the ballistic and delamination mechanisms of T700 carbon fibre/epoxy laminate with a [0/90]s stacking sequence. The effect of the mass and diameter of spherical projectiles on CFRP laminate is investigated numerically. A numerical study of projectiles with different diameters (6mm, 10 mm, and 12mm) on CFRP laminates with thicknesses of 1.5mm and 3mm is conducted, encompassing a broad spectrum of projectile incident velocities (from 500 m/s to 1700 m/s). Furthermore, a numerical model containing cohesive elements is developed and verified using experimental results from the literature. When compared to experimental results, the numerical simulation results were found to be within acceptable ranges. On comparing the effect of laminate thickness, it was determined that 1.5mm laminates had better energy absorption capability as velocity increased compared to 3mm laminates. The results indicated that the energy absorption capability of the 3mm laminate was reduced by 8.8%, whereas the 1.5mm laminate was reduced by 3%. A study using multi-layered laminate is studied, and a parametric study is carried out with projectiles of different mass and size. The results from the parametric study concluded that smaller geometry projectiles induced more significant damage in the laminate than larger geometry projectiles with constant mass.

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Section: Optimise Laminate Configuration and Projectile Size Effectmentioning

confidence: 99%

A numerical analysis of CFRP laminate behaviour under high-velocity impact

Ghosh,

Ramajeyathilagam

2024

E3S Web Conf.

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Low‐velocity impact response and post‐impact assessment of self‐healing composites with different stacking configurations of core–shell nanofibers

Cai,

Gan,

Chen

et al. 2023

Polymer Composites

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This work investigates the low‐velocity impact (LVI) and self‐healing behavior of carbon fiber composite laminates interlaced with electrospun polyacrylonitrile core–shell nanofibers (PAN@CFRP). The main goal is to investigate the influence of different stacking configurations of core–shell nanofibers on the impact resistance and self‐healing properties of composite laminates. To achieve the purpose, three different stacking configurations were designed and tested alongside virgin specimens. The damage mechanism and self‐healing of laminates following LVI were determined using ultrasonic C‐scan and cross‐sectional microscopy examinations. At an impact energy of 14.1 J, the flexural strength of the post‐healing PAN‐3@CFRP specimen reached 95.0% of the initial value, whereas at an impact energy of 21.8 J, severe impact damage was observed in the laminates with different configurations. Among the laminates, the PAN‐1@CFRP specimen had the highest flexural strength after healing, which reached 80.1% of its pre‐impact strength. As observed, the impact resistance and self‐healing capacity of composites could be significantly enhanced by optimizing the distribution configuration of core–shell nanofibers for various impact energies.Highlights The introduction of electrospun core–shell nanofibers has not significantly compromised the mechanical properties of the composites, but rather enhanced their toughness. The addition of core–shell nanofibers significantly enhances the impact resistance of the composites and imparts excellent self‐healing properties to the material. The flexural strength of impact‐damaged specimens with different stacking configurations can be restored up to 95% of the undamaged specimen after repair treatment. Significantly improved impact resistance and self‐healing ability of laminates by optimizing the distribution configuration of core–shell nanofibers between composite layers.

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The investigation of deflection behavior in carbon/epoxy and glass/epoxy composite laminates under low-velocity impact with small projectiles

Ramezani

2024

Journal of Composite Materials

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This study examined the impact behavior of carbon/epoxy and glass/epoxy composite laminates with 2, 4, and 6 mm thicknesses under low-velocity tests. The investigation involved subjecting the composite laminates under small-impact loads using spherical, cylindrical, and conical steel projectiles, each weighing 3 g. The impacts conducted at 29.5, 36.5, and 51 m/s velocities. This investigation modeled using finite element (FE) methods and analytical approaches. In the analytical method, the mass and spring model used for the impact of small projectiles. The research findings revealed that, in 2 mm thick carbon/epoxy composite laminates, the maximum deflection at the mid-point induced by a spherical projectile was 1.37 mm. This value exhibited a 48.91% and 19.13% increase compared to impacts with cylindrical and conical projectiles, respectively. Additionally, a comprehensive examination of delamination across all samples indicated the maximum delamination occurrence in glass/epoxy samples, showcasing lower impact resistance than carbon/epoxy laminates. Notably, with an increase in thickness, the delamination phenomenon in the samples exhibited a decreasing trend. In addition, the maximum value of delamination in the composite laminates were with spherical, conical, and cylindrical projectiles respectively, and also, there was an excellent convergence between FE and analytical results.

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Influence of various damage mechanisms on the low‐velocity impact response of composite laminates

Cited by 3 publications

References 46 publications

A numerical analysis of CFRP laminate behaviour under high-velocity impact

A numerical analysis of CFRP laminate behaviour under high-velocity impact

Low‐velocity impact response and post‐impact assessment of self‐healing composites with different stacking configurations of core–shell nanofibers

The investigation of deflection behavior in carbon/epoxy and glass/epoxy composite laminates under low-velocity impact with small projectiles

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