Energy Absorption of Sandwich Panels Subjected to In-plane Loads
2006 (English)In: 8th Biennial ASME Conference on EngineeringSystems Design and Analysis, Torino, Italy, 4-7 July, 2006: Volume 3: Dynamic Systems and Controls, Symposium on Design and Analysis of Advanced Structures, and Tribology, 2006, 739-747 p.Conference paper (Refereed)
Theenergy absorption mechanisms of sandwich panels subjected to in-plane compressionare studied. Quasi-static experiments are performed and analysed in orderto support the development of a modelling strategy for failureinitiation and propagation in sandwich panels. The test specimens consistof balsa wood cores and glass-fibre reinforced polyester faces. Duringcompression of a tested panel, the displacement field on oneouter face is measured using a digital speckle photography (DSP)equipment. The absorbed energy is related to debonding, delamination andcrushing of the face sheets and crushing of the core.At initial failure, the load drops dramatically and is thenrelatively constant during continued compression. The energy per unit lengthnecessary for propagation of the damage is considerably lower thanfor damage initiation. Assuming that the damage propagation is uniformthrough the thickness of the panels a simple model ofdamage growth is developed. Calibration of the model is howeverdubious due to the large scatter in the experimental results.The studied material shows damage mechanisms favourable for efficient energyabsorption but the behaviour is far from being optimal.
Place, publisher, year, edition, pages
2006. 739-747 p.
Computer simulation; Delamination; Energy absorption; Loads (forces); Mathematical models; Structural
Composite Science and Engineering
IdentifiersURN: urn:nbn:se:kth:diva-11152DOI: 10.1115/ESDA2006-95771ISI: 000249558200084ScopusID: 2-s2.0-33845767479ISBN: 0-7918-4250-9OAI: oai:DiVA.org:kth-11152DiVA: diva2:236433
8th Biennial ASME Conference on Engineering Systems Design and Analysis, Torino, Italy, 2006
QC 201007282009-09-232009-09-232016-05-16Bibliographically approved