An experimental investigation on low-velocity impact response and compression after impact of a stochastic, discontinuous prepreg tape composite

Kravchenko, Sergii G.; Volle, Chris; Kravchenko, Oleksandr G.

doi:10.1016/j.compositesa.2021.106524

Cited by 17 publications

(4 citation statements)

References 53 publications

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“…The compressive load-deflection curves of non-impacted specimens were also recorded to provide reference values. As expected [14], although a significant scatter was observed, all specimens indicate similar trends with increasing the applied compressive load. It is worth mentioning that global buckling did not happen to all specimens (i.e., non-impacted and impacted) during the compression test; however, distortion of some curves can be observed, which is consistently related to the evidence of lateral deflection [15].…”

Section: Resultssupporting

confidence: 84%

“…Nevertheless, at the level of BVID (i.e., 6 m/s), a slight increase in impact energy was recorded for B-type specimens (i.e., 32.5 J) compared to A-type specimens (i.e., 31.7 J). As suggested by Kravchenko [14], this is correlated with an increased damaged area within the laminate. A few illustrative plots of the applied compression load in relation to specimen edge displacement, acquired during CAI tests, are shown in Figure 8 for each angle-ply configuration considered.…”

Section: Resultssupporting

confidence: 51%

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Another Compression after Low-Velocity Impact Test Setup: A Case Study of Reversing the Symmetric Lay-Up for an Angle-ply CFRP Laminated Composite

Baba

2024

Preprint

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This paper reports an experimental investigation on compression after low-velocity impact response for two lay-up configurations of symmetric CFRP laminated composite specimens obtained by reversing their angle-ply orientation, namely [0/-45/45/90]s versus [90/45/-45/0]s, the impact velocity of the projectile up to the BVID level being subsequently considered. To this aim, a modified Compression-After-Impact (CAI) test device is proposed that involves clamping the specimen's upper and lower edges between two adjustable wide and flat anti-buckling plates through a removable bolt-nut assembly. Such a solution relies on the fact that the specimen's active length is shortened, reducing the risk of global buckling. Besides, the bolts carry part of the load with minor localized bearing damage, provided that the metallic plates act as washers by supporting the bolt-bearing region laterally, thus avoiding crashing failures at the specimens’ loaded edges. With these settings, roughly the same percent decrease in the average values of maximum compression load (i.e., 22%) was recorded for both lay-up configurations impacted up to their BVID threshold, whereas in terms of compressive stiffness behavior, a reduction of 17 % was found for [0/-45/45/90]s specimens compared to 6 % obtained for [90/45/-45/0]s specimens.

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Section: Resultssupporting

confidence: 84%

Section: Resultssupporting

confidence: 51%

Another Compression after Low-Velocity Impact Test Setup: A Case Study of Reversing the Symmetric Lay-Up for an Angle-ply CFRP Laminated Composite

Baba

2024

Preprint

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“…The impact response and damage of a multidirectional discontinuous prepreg tape composite was probed. 26,27 The discontinuous structure formed by shorter prepreg tapes added more interfaces and absorbed more energy. Fiber cracks can control the loss of stiffness, meanwhile, delamination play a role in extending the zone affected by these cracks.…”

Section: Introductionmentioning

confidence: 99%

“…In brief, the introduction of discontinuous structures resulted in a decrease in the tensile strength of CFRPs; however, it did achieve a certain degree of pseudo‐ductility on the composites, thereby which improves the tensile toughness of CFRPs. The impact response and damage of a multidirectional discontinuous prepreg tape composite was probed 26,27 . The discontinuous structure formed by shorter prepreg tapes added more interfaces and absorbed more energy.…”

Section: Introductionmentioning

confidence: 99%

Exploration of impact response and damage mechanism of discontinuous CFRP laminates subjected to low velocity impact

Xiao

et al. 2023

Polymer Composites

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Carbon fiber‐reinforced polymer composites (CFRPs) are widely used in many fields because of their excellent mechanical properties; however, they are very sensitive to low velocity impact. A new‐type biomimetic structure, which has a “bricks‐and‐mortar” arrangement of nacre from mollusk shells, was designed and manufactured for enhancing the impact resistance of the CFRPs. The impact response and absorption of impact energy of this structure were also investigated. Impact damage forms of the biomimetic structure were analyzed based on the surface and internal morphologies. The results indicate that biomimetic structure can decrease the impact damage of the CFRPs. Two damage behaviors of the biomimetic structure were observed under relatively higher impact energy. The discontinuous structure reduces the damage using a smaller load for the first damage and a larger deformation for the second damage, which improves the impact resistance of the CFRPs. The discontinuous structure restrains longitudinal crack propagation to a certain extent, effectively reducing the damaged area of the CFRPs. Thus, the proposed structure can increase the strength retention rate of the material by about 5%. In addition, the compression after impact damage modes of CFRPs with three types of structure are summarized and classified originally.

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Structure Effect on Damage Evolution of 3-D Angle-interlock Woven Composites Under Low-velocity Impact By Coupled DIC Analysis and Numerical Study

Cao

2022

Appl Compos Mater

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An experimental investigation on low-velocity impact response and compression after impact of a stochastic, discontinuous prepreg tape composite

Cited by 17 publications

References 53 publications

Another Compression after Low-Velocity Impact Test Setup: A Case Study of Reversing the Symmetric Lay-Up for an Angle-ply CFRP Laminated Composite

Another Compression after Low-Velocity Impact Test Setup: A Case Study of Reversing the Symmetric Lay-Up for an Angle-ply CFRP Laminated Composite

Exploration of impact response and damage mechanism of discontinuous CFRP laminates subjected to low velocity impact

Structure Effect on Damage Evolution of 3-D Angle-interlock Woven Composites Under Low-velocity Impact By Coupled DIC Analysis and Numerical Study

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