TY  - EJOU
AU  - He, Zhelong 

TI  - Concurrent	Topology	and	Fiber	Path	Optimization	for	Continuous	Fiber	 Composite	Under	Thermo-Mechanical	Loadings
T2  - The International Conference on Computational \& Experimental Engineering and Sciences

PY  - 2023
VL  - 26
IS  - 1
SN  - 1933-2815

AB  - This	 presentation	 introduces	 a	 concurrent	 topology	 and	 fiber-path	 optimization	 for	 continuous	 fiber	
composite	 under	 thermos-mechanical	 loadings.	 The	 optimization	 goal	 is	 to	 minimize	 the	 structural	
compliance	of	composite	with	thermos-mechanical	coupling	while	satisfying	volume	fraction	constraint,	and	
ensuring the	 manufacturability	 by	 using	 continuous	 fibers	 and	 avoiding	 the	 appearance	 of	 over	 thin	
members.	 Level-set	 function	 is	 utilized	 to	 represent	 both	 shape	 boundary	 and	 fiber	 path.	 The	 zero	 isocontour	of	level-set	 function	is	updated	using	a	shape	sensitivity	analysis	 for	anisotropic	composite,	and	
fiber	paths	in	shape	are	given	by	level-set	 functions	determined	 from	shape	boundary.	A	level-set-based	
mesh	 evolution	 method	 is	 introduced	 following	 the	 classical	 level-set	 method	 based	 on	 ersatz-material	
approach	 during	 optimization	 process	 to	 further	improve	 the	 result’s	accuracy.	A	 thickness	 control	 step	
based	on	a	variational	approach	is	also	incorporated	to	enlarge	the	over	thin	members	when	they	appear	to	
ensure	the	optimized	design	manufacturable.	The	influences	of	thermal	loadings	are	evaluated	by	applying	
different	temperature	increases	to	the	composites,	showing	their	large	impacts	on	the	optimized	shapes.	
The	developed	algorithm	has	been	applied	to	several	numerical	examples	to	demonstrate	its	effectiveness,	
showing	 that	 the	 method	 is	 very	 effective	 on	 reducing	 the	 structural	 compliance	 and	 ensuring	
manufacturability	of	continuous	fiber	composite.
KW  - 

DO  - 10.32604/icces.2023.010452