Assessing through-thickness damage propagation, impact tests on layered composite beams: experimental work and numerical simulation

Ignacio Vidal-Pérez*, Rasmus Eriksen, Christian Berggreen, Jørgen Kepler

*Corresponding author for this work

Research output: Contribution to book/anthology/report/conference proceedingArticle in proceedingResearchpeer-review

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Abstract

The growing applications of layered fiber reinforced composite materials lead to the potential use of such lightweight materials for blast and ballistic impact resistant panels. Under such high strain rate loading, through-thickness damage propagation is crucial for the structural integrity of the panels. Experiments performed in composite panels under blast loading exhibited little information for the understanding of the time-line of damage propagation as only post-mortem inspection can be done. Instrumentation may be installed in order to follow the blast but the task reveals itself arduous as all the instruments must be protected against the blast. The sparse information can be valuable for configuration screening purposes, but is not su ffi cient for comparison and validation of numerical models. The work focuses on performing controlled impact experiments in narrow beams filmed side-wise with high-speed cameras. The narrow geometry of the beams leaves the thickness of the specimen exposed to the cameras allowing for a real-time monitoring of the stress waves propagating and for assessing the time-line of through-thickness damage propagation onset. Results showed that polyethylene impactors, given the right diameter, are the most suitable soft impactors. Numerical models including in-plane and out-of-plane damage propagation are being built in order to replicate the experimentally observed damage. The ultimate goal being establishing design rules for such lightweight fiber reinforced panels. It is numerically observed that, the speed propagation of delamination in the longitudinal direction reaches a common constant value for all interfaces.

Original languageEnglish
Title of host publicationDYMAT 2018 - 12th International Conference on the Mechanical and Physical Behaviour of Materials under Dynamic Loading
EditorsAntonio Cosculluela, Ezio Cadoni, Eric Buzaud, Herve Couque
Number of pages6
PublisherEDP Sciences
Publication date7 Sep 2018
Article number01026
ISBN (Print)9782759890538
DOIs
Publication statusPublished - 7 Sep 2018
Event12th International Conference on the Mechanical and Physical Behaviour of Materials under Dynamic Loading, DYMAT 2018 - Arcachon, France
Duration: 9 Sep 201814 Sep 2018

Conference

Conference12th International Conference on the Mechanical and Physical Behaviour of Materials under Dynamic Loading, DYMAT 2018
Country/TerritoryFrance
CityArcachon
Period09/09/201814/09/2018
SeriesEPJ Web of Conferences
Volume183
ISSN2101-6275

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