CaltechAUTHORS
  A Caltech Library Service

Void collapse under distributed dynamic loading near material interfaces

Shpuntova, Galina and Austin, Joanna (2012) Void collapse under distributed dynamic loading near material interfaces. Bulletin of the American Physical Society, 57 (17). ISSN 0003-0503 . http://resolver.caltech.edu/CaltechAUTHORS:20141001-151622569

[img]
Preview
PDF - Published Version
See Usage Policy.

16Kb

Use this Persistent URL to link to this item: http://resolver.caltech.edu/CaltechAUTHORS:20141001-151622569

Abstract

Collapsing voids cause significant damage in diverse applications from biomedicine to underwater propulsion to explosives. While shock-induced void collapse has been studied extensively, less attention has been devoted to stress wave loading, which will occur instead if there are mechanisms for wave attenuation or if the impact velocity is relatively low. A set of dynamic experiments was carried out in a model experimental setup to investigate the effect of acoustic heterogeneities in the surrounding medium on void collapse. Two tissue-surrogate polymer materials of varying acoustic properties were used to create flowfield geometries involving a boundary and a void. A stress wave, generated by projectile impact, triggered void collapse in the gelatinous polymer medium. When the length scales of features in the flow field were on the same order of magnitude as the stress wave length scale, the presence of the boundary was found to affect the void collapse process relative to collapse in the absence of a boundary. This effect was quantified for a range of geometries and impact conditions using a two-color, single-frame particle image velocimetry technique.


Item Type:Article
Related URLs:
URLURL TypeDescription
http://meeting.aps.org/Meeting/DFD12/Session/G23.6PublisherArticle
Additional Information:© 2014 American Physical Society. Date submitted: 27 Sep 2012. Research supported by NSF Award #0954769, “CAREER: Dynamics and damage of void collapse in biological materials under stress wave loading” with Prof. Henning Winter as Program Manager. Abstract ID: BAPS.2012.DFD.G23.6
Group:GALCIT
Funders:
Funding AgencyGrant Number
NSF0954769
Record Number:CaltechAUTHORS:20141001-151622569
Persistent URL:http://resolver.caltech.edu/CaltechAUTHORS:20141001-151622569
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:50154
Collection:CaltechAUTHORS
Deposited By: Ruth Sustaita
Deposited On:03 Oct 2014 22:05
Last Modified:20 Sep 2016 23:02

Repository Staff Only: item control page