000004870 001__ 4870
000004870 005__ 20141119144600.0
000004870 04107 $$aeng
000004870 046__ $$k2002-06-02
000004870 100__ $$aBeyerlein, Irene J.
000004870 24500 $$aINFLUENCE OF LOCAL MICROSTRUCTURE ON ELASTIC MODULI OF HIGH EXPLOSIVE COMPOSITES

000004870 24630 $$n15.$$pProceedings of the 15th ASCE Engineering Mechanics Division Conference
000004870 260__ $$bColumbia University in the City of New York
000004870 506__ $$arestricted
000004870 520__ $$2eng$$aA multiscale homogenization approach, based on the generalized method of cells (GMC) is proposed for examining the influence of local variations in microstructure on the bulk response of heterogeneous high explosive (HE) composite materials. On average, the material consists of 93% brittle crystal particles ranging from 1 µm to 450 µm in size, bound by a plastic polymer material. Using GMC, we analyze the HE elastic response considering several representative volume elements with the same crystal volume fraction but with different particle/binder arrangements. Based on strain rate sensitivity of the composite elastic moduli, we find that these microstructures can be classified as either binder bridging or particle bridging. The microstructures with particle bridging exhibit significantly higher moduli (by an order of magnitude) and lower strain rate sensitivity than do microstructures with binder bridging. Such a classification can be used to reduce the number of configurations that need to be considered in mechanical simulations of HE.

000004870 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000004870 653__ $$aHeterogeneous material, general method of cells, thermo-mechanical response, particulate composites, localization

000004870 7112_ $$a15th ASCE Engineering Mechanics Division Conference$$cNew York (US)$$d2002-06-02 / 2002-06-05$$gEM2002
000004870 720__ $$aBeyerlein, Irene J.$$iWilliams, Todd O.
000004870 8560_ $$ffischerc@itam.cas.cz
000004870 8564_ $$s341823$$uhttps://invenio.itam.cas.cz/record/4870/files/459.pdf$$yOriginal version of the author's contribution as presented on CD, .
000004870 962__ $$r4594
000004870 980__ $$aPAPER