The response of hybrid titanium carbon laminates to the low-velocity impact

•The objective were Hybrid Titanium Carbon Laminates as a second generation of FML.•The fibre orientation in HTCL has a significant influence on damage propagation.•Dominant failure occurs at the metal/composite and composite/composite interfaces.•HTCL can be an appropriate solution for materials un...

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Bibliographic Details
Published in:Engineering fracture mechanics 2021-04, Vol.246, p.107608, Article 107608
Main Authors: Jakubczak, P., Bieniaś, J.
Format: Article
Language:English
Subjects:
Aerospace industry
Carbon
Composite materials
Composites
Crack
Crack initiation
Cracking (fracturing)
Dynamic loads
Empirical analysis
Energy absorption
Failure
Failure analysis
Fiber-metal laminates
FML
Impact
Impact resistance
Interlayers
Load resistance
Titanium
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Summary:•The objective were Hybrid Titanium Carbon Laminates as a second generation of FML.•The fibre orientation in HTCL has a significant influence on damage propagation.•Dominant failure occurs at the metal/composite and composite/composite interfaces.•HTCL can be an appropriate solution for materials under dynamic loads. Impact resistance is one of the more critical and important features of composite materials used in the aerospace industry. The objective of work was to evaluate the hybrid titanium carbon laminate resistance to dynamic loads. The paper utilizes numerous criteria for evaluation of impact behaviour of materials, including force change, energy absorption characteristics and failure identification. To thoroughly analyze the damage mechanism, a detailed fractography of laminate destruction was performed. Moreover, an empirical model for determining the universal impact behaviour coefficient of fibre metal laminate (FML) was proposed. The first significant force fluctuations prove to reach the laminate’s impact resistance limit as caused by the initiation of cracking of respective layers and the consequent reduction of laminate rigidity. A growing proportion of absorbed energy in the case of growing impact energies, from some 50% in case of 2.5 J of energy, up to circa 80% in case of 30 J of energy was recorded. Reduction of interlayers with crossing fibers fosters the creation of cracks in the lower layer of titanium due to the limited capability of partial absorption of energy through delamination.
ISSN:0013-7944
1873-7315
DOI:10.1016/j.engfracmech.2021.107608