TY - GEN
T1 - Penetrating in granular materials
T2 - Geotechnical Frontiers 2017
AU - Huang, Sichuan
AU - Tao, Junliang
N1 - Publisher Copyright:
© ASCE.
PY - 2017
Y1 - 2017
N2 - It's reported that Ensis directus (a species of Bivalves) achieves exceptionally high penetrating efficiency through periodically expanding/contracting its body during burrowing. This paper provides insights into the cyclic expanding/contracting process in cohesionless granules based on a simplified discrete element method (DEM) framework. In this DEM model, Razor clam is simulated by a circular cavity with a radius changing in a sinusoidal fashion. Different expanding frequencies are considered to study the interaction pattern between the cavity and the surrounding granules. Various stages of expanding process including initial movement, progressive expansion and contraction are captured. A static penetration case is included for comparison of penetration performance. Results positively confirm the contribution of dynamic expansion on the reduction of penetration resistance and energy saving. A critical expanding frequency exists, under which energy saving is optimal. Findings from this study can shed light on the design of smart devices for self-boring or site characterization.
AB - It's reported that Ensis directus (a species of Bivalves) achieves exceptionally high penetrating efficiency through periodically expanding/contracting its body during burrowing. This paper provides insights into the cyclic expanding/contracting process in cohesionless granules based on a simplified discrete element method (DEM) framework. In this DEM model, Razor clam is simulated by a circular cavity with a radius changing in a sinusoidal fashion. Different expanding frequencies are considered to study the interaction pattern between the cavity and the surrounding granules. Various stages of expanding process including initial movement, progressive expansion and contraction are captured. A static penetration case is included for comparison of penetration performance. Results positively confirm the contribution of dynamic expansion on the reduction of penetration resistance and energy saving. A critical expanding frequency exists, under which energy saving is optimal. Findings from this study can shed light on the design of smart devices for self-boring or site characterization.
UR - http://www.scopus.com/inward/record.url?scp=85018749946&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85018749946&partnerID=8YFLogxK
U2 - 10.1061/9780784480441.063
DO - 10.1061/9780784480441.063
M3 - Conference contribution
AN - SCOPUS:85018749946
T3 - Geotechnical Special Publication
SP - 604
EP - 613
BT - Geotechnical Special Publication
A2 - Brandon, Thomas L.
A2 - Valentine, Richard J.
PB - American Society of Civil Engineers (ASCE)
Y2 - 12 March 2017 through 15 March 2017
ER -