Prediction of impact-induced damage accumulation in a composite using a macromolecular polymer model
2009 (English)In: Collection of Technical Papers: 50th AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics and Materials Conference; Palm Springs, CA ;4 May 2009 - 7 May, Reston, Va.: American Institute of Aeronautics and Astronautics, AIAA , 2009Conference paper (Refereed)
Polymers and their composites are increasingly sought for applications where impact resistance constitutes an important design specification. One example of practical significance is the use of polymer-based composites in novel designs of fan blade containment cases (BCCs) of jet engines. During a blade-out event, a failed blade may penetrate the BCCs, but damage has to be contained within the composite. Here, we develop the basic ingredients of a multiscale modeling methodology with focus on the scale of the basic structural unit, where polymeric matrix and reinforcements are explicitly modeled. The polymer model accounts for nonlinear behavior, finite strains, intrinsic softening, tension- compression asymmetry, rate-sensitivity, thermal softening and kinematic-like hardening associated with macomolecular mechanisms of chain reorientations. In addition to the polymer model, models of matrix cracking and fiber debonding are used. The material parameters entering the macromolecular model are identified based on tests conducted on an untoughened epoxy resin for a wide range of temperatures and strain rates. Results from unit-cell calculations are presented to discuss damage initiation and progression as well as competition between modes of failure
Place, publisher, year, edition, pages
Reston, Va.: American Institute of Aeronautics and Astronautics, AIAA , 2009.
IdentifiersURN: urn:nbn:se:ltu:diva-40407ScopusID: 84855625183Local ID: f87df869-8c65-4b3c-984d-f1b964e9387bISBN: 9781563479731OAI: oai:DiVA.org:ltu-40407DiVA: diva2:1013929
AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics and Materials : 04/05/2009 - 07/05/2009
Upprättat; 2009; Bibliografisk uppgift: Article number2009-2621; 20130131 (andbra)2016-10-032016-10-03