TY  - EJOU
AU  - Chen, Zhuang 
AU  - Chu, Xihua 
AU  - Yang, Diansen 

TI  - A	Cosserat	Bond-Based	Correspondence	Model
T2  - The International Conference on Computational \& Experimental Engineering and Sciences

PY  - 2023
VL  - 26
IS  - 3
SN  - 1933-2815

AB  - In	this	study,	we	develop	a Cosserat bond-based correspondence	model(Cosserat	BBCM) based	on	the	bondbased	correspondence	model (BBCM)[1].	BBCM	is	a	generalized	bond-based	peridynamic	model,	where	the	
peridynamic	pair-wise	force (PD	force) is	calculated	by	classical	constitutive	equations	through	the	relation	
between	PD	force and	stress. In	our	previous	study,	we	develop	the	Cosserat	peridynamic	model	(CPM)	to	
investigate	the	microstructure-related	crack	growth	behavior	[2,	3].	But	the	interactions	between	material	
particles	are	represented	by	PD	 forces	and	moments	instead	of	 the	stress	and	couple	stress.	Due	 to	 this	
divergence,	 the	 Cosserat	 constitutive	 model	 such	 as	 the	 elastoplastic	 Cosserat	 model	 [4]	 is	 hard	 to	 be	
implemented	into	the	CPM.	To	solve	this	problem,	we	try	to	introduce	the	Cosserat	continuum	into	the	BBCM	
and	develop	the	Cosserat	BBCM,	where	the PD	forces	and	moments	are	calculated	by	Cosserat	constitutive	
equations. In	 the	numerical	examples,	 the	proposed	Cosserat BBCM is	validated	 through	 the	comparison	
with	the	Cosserat	finite	element	method.	And	the	influences	of	microstructure	parameters	(internal	length	
scale	and	Cosserat	shear	modulus)	on the crack	propagation	are	investigated.
KW  - Cosserat peridynamics; microstructure; numerical	simulation; crack	propagation

DO  - 10.32604/icces.2023.09057