TY - GEN
T1 - A microscopic study on local strain rate sensitivity of polypropylene syntactic foam with microballoons
AU - Wang, Enyang
AU - Omiya, Masaki
PY - 2011
Y1 - 2011
N2 - The local strain rate sensitivity of polypropylene syntactic foams with polymer microballoons in the relative density from 0.5 to 0.8 is studied at the nominal strain rate ranged from 10-1 to 102 s -1. Johnson-Cook law is employed to show the viscoelastic properties of polymer syntactic foams. A microscopic investigation reveals that the strain rate sensitivity and the effect of localised deformations can be observed at the higher strain rate (50-100 s-1). The local deformation mechanism is different in different strain rate regimes due to the effect of local strain rate. At strain rates below 10 s-1, cell-face stretching is the dominant deformation mechanism. At strain rates from 50 s-1 to 100 s-1, cell-face stretching and cell-edge bending are the main deformation mechanism.
AB - The local strain rate sensitivity of polypropylene syntactic foams with polymer microballoons in the relative density from 0.5 to 0.8 is studied at the nominal strain rate ranged from 10-1 to 102 s -1. Johnson-Cook law is employed to show the viscoelastic properties of polymer syntactic foams. A microscopic investigation reveals that the strain rate sensitivity and the effect of localised deformations can be observed at the higher strain rate (50-100 s-1). The local deformation mechanism is different in different strain rate regimes due to the effect of local strain rate. At strain rates below 10 s-1, cell-face stretching is the dominant deformation mechanism. At strain rates from 50 s-1 to 100 s-1, cell-face stretching and cell-edge bending are the main deformation mechanism.
KW - Cellular microstructure
KW - Closed-cell
KW - Density
KW - Polymer
KW - Relative elastic modulus
KW - Relative yield stress
KW - Strain rate
KW - Syntactic foam
UR - http://www.scopus.com/inward/record.url?scp=78650945547&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=78650945547&partnerID=8YFLogxK
U2 - 10.4028/www.scientific.net/AMR.160-162.1280
DO - 10.4028/www.scientific.net/AMR.160-162.1280
M3 - Conference contribution
AN - SCOPUS:78650945547
SN - 9780878492169
T3 - Advanced Materials Research
SP - 1280
EP - 1284
BT - Materials Science and Engineering Applications
T2 - 2011 International Conference on Materials Science and Engineering Applications, ICMSEA 2011
Y2 - 15 January 2011 through 16 January 2011
ER -