@Article{icces.2023.08949,
AUTHOR = {Mingliang	Jiang, Zhujiang	Wang},
TITLE = {Reformulation of	the	Virtual	Fields	Method	Based	on	the	Variation	of	 Elastic	Energy	for	Hyperelastic	Materials},
JOURNAL = {The International Conference on Computational \& Experimental Engineering and Sciences},
VOLUME = {26},
YEAR = {2023},
NUMBER = {2},
PAGES = {1--1},
URL = {http://www.techscience.com/icces/v26n2/53906},
ISSN = {1933-2815},
ABSTRACT = {This	work	deals	with	the	parameter	identification	of	invariant-based	hyperelastic	materials	using	the	virtual	
fields	 method	 (VFM).	 Combined	 with	 the	 full-field	 deformation	 data	 obtained	 from the digital	 image	
correlation	(DIC),	VFM	has	been	utilized	to	characterize	the	mechanical	properties	of	hyperelastic	materials
[1].	In	the	conventional	formulation	of	the	VFM,	the	calculation	of	the	internal	virtual	work	(IVW)	needs	to	
obtain	the	stress	and	conjugate	virtual	strains,	which	requires	a	lot	of	calculation	and	derivation	work.	In	
this	paper,	the	VFM	is	reformulated	by	calculating	the	IVW	through	the	variation	of	elastic	energy,	which	is	
more	concise	and	easier	to	be	implemented [2].	To	illustrate	this	reformulated	framework,	a	neo-Hookeantyped	material	and	a	fiber-reinforced	neo-Hookean-typed	material	are	selected	for study,	and	biaxial	tests	
which	give	 rise	 to	 heterogeneous	 deformation	 fields	are	 performed	 on	 these	materials.	 Finally,	material	
parameters	are	successfully	extracted	using	the	reformulated	VFM	framework.},
DOI = {10.32604/icces.2023.08949}
}