@Article{icces.2023.09320,
AUTHOR = {Fengchao Wu, Xuhai Li, Yi Sun, Yuanchao Gan, Huayun Geng, Yuying Yu, Jianbo Hu},
TITLE = {Multi-phase	Modeling	on	Spall	and	Recompression	Process	of	Tin	Under	 Double	Shockwaves},
JOURNAL = {The International Conference on Computational \& Experimental Engineering and Sciences},
VOLUME = {26},
YEAR = {2023},
NUMBER = {3},
PAGES = {1--1},
URL = {http://www.techscience.com/icces/v26n3/54064},
ISSN = {1933-2815},
ABSTRACT = {The	 dynamical	 response	 of	 materials	 to	 multiple	 shock	 waves	 is	 a	 critical	 issue	 in	 shock	 physics	 and	
engineering	applications.	In	this	work,	hydrodynamic	simulations	are	used	to	investigate	the	shock-induced	
spall	 failure	 and	 subsequent	 recompression	 characteristics	 of	 tin,	 under	 the	implementation	 of	 a	multiphase	equation	of	state,	multi-phase	constitutive	 relations,	and	a	damage	model.	As	within	experiments,	
double	shock	loadings	in	simulations	are	driven	by	layered	impactors	with	different	shock	impedances.	In	
general,	 our	 numerical	 calculations	agree	well	with	 recent	 tin	 spall	experiments	and	 reproduce	 the	 free	
surface	 velocity	 characteristics.	 Interesting	 dynamic	 behaviors	 such	 as	 tin	 shock	 compression,	 dynamic	
tensile	 fracture,	 and	 void	 compaction	 are	 revealed	 to	 occur	 in	 succession	 as	 a	 result	 of	 complex	 wave	
interactions	 caused	 by	 multiple	 impacts.	 With	 increasing	 shock	 strength,	 the	 appearance	 of	 β-γ	 phase	
transition	or	melting	not	only	changes	the	primary	fracture	characteristic,	but	also	affects	the	subsequent	
compaction	state	and	inter-shock	interval,	which	suggests	the	significant	effect	of	phase	transition	and	its	
synergism	with	spall	fracture.	Meanwhile,	the	multi-phase	simulation	results	show	that	certain	parts	of	the	
tin	material	are	in	the	mixed	phase	state	during	dynamic	loading	or	unloading,	like	the	coexistence	of	β	phase	
and	γ	phase.	Although	current	research	provides	a	quantitative	understanding	of	spall	features	induced	by	
double	 shocks,	 better	multiphase	material	models	are	 needed	 to	improve	 fidelity	in	 describing	 complex	
fracture	behaviors.},
DOI = {10.32604/icces.2023.09320}
}