Change search
ReferencesLink to record
Permanent link

Direct link
Compression-after-impact strength of sandwich panels with core crushing damage
KTH, School of Engineering Sciences (SCI), Aeronautical and Vehicle Engineering.
KTH, School of Engineering Sciences (SCI), Aeronautical and Vehicle Engineering.ORCID iD: 0000-0002-9744-4550
2005 (English)In: Applied Composite Materials, ISSN 0929-189X, E-ISSN 1573-4897, Vol. 12, no 04-mar, 149-164 p.Article in journal (Refereed) Published
Abstract [en]

Compression-after-impact (CAI) strength of foam-cored sandwich panels with composite face sheets is investigated experimentally. The low-velocity impact by a semi-spherical (blunt) projectile is considered, producing a damage mainly in a form of core crushing accompanied by a permanent indentation (residual dent) in the face sheet. Instrumentation of the panels by strain gauges and digital speckle photography analysis are used to study the effect of damage on failure mechanisms in the panel. Residual dent growth inwards toward the mid-plane of a sandwich panel followed by a complete separation of the face sheet is identified as the failure mode. CAI strength of sandwich panels is shown to decrease with increasing impact damage size. Destructive sectioning of sandwich panels is used to characterise damage parameters and morphology for implementation in a finite element model. The finite element model that accounts for relevant details of impact damage morphology is developed and proposed for failure analysis and CAI strength predictions of damaged panels demonstrating a good correlation with experimental results.

Place, publisher, year, edition, pages
Springer Netherlands, 2005. Vol. 12, no 04-mar, 149-164 p.
Keyword [en]
impact, impact damage, sandwich panels, foam core, residual dent, crushe core, dent growth, residual strength, failure mechanisms, 2d approach, beams
National Category
Composite Science and Engineering
URN: urn:nbn:se:kth:diva-14724DOI: 10.1007/s10443-005-1119-1ISI: 000228868100003ScopusID: 2-s2.0-18244386456OAI: diva2:332765

QC 20100525

Available from: 2010-08-05 Created: 2010-08-05 Last updated: 2015-05-06Bibliographically approved

Open Access in DiVA

fulltext(866 kB)81 downloads
File information
File name FULLTEXT01.pdfFile size 866 kBChecksum SHA-512
Type fulltextMimetype application/pdf

Other links

Publisher's full textScopusFulltext available at Springer link

Search in DiVA

By author/editor
Zenkert, Dan
By organisation
Aeronautical and Vehicle Engineering
In the same journal
Applied Composite Materials
Composite Science and Engineering

Search outside of DiVA

GoogleGoogle Scholar
Total: 81 downloads
The number of downloads is the sum of all downloads of full texts. It may include eg previous versions that are now no longer available

Altmetric score

Total: 95 hits
ReferencesLink to record
Permanent link

Direct link