Parametric Analysis of Various Test Configurations for Measuring the Interlaminar Fracture Toughness of CMCs using LayerSlayer and Abaqus

Award Information
Agency:
Department of Defense
Branch
Navy
Amount:
$79,985.00
Award Year:
2013
Program:
STTR
Phase:
Phase I
Contract:
N68335-13-C-0347
Award Id:
n/a
Agency Tracking Number:
N13A-008-0159
Solicitation Year:
2013
Solicitation Topic Code:
N13A-T008
Solicitation Number:
2013.A
Small Business Information
MA, Cambridge, MA, 02142-1189
Hubzone Owned:
N
Minority Owned:
N
Woman Owned:
N
Duns:
604717165
Principal Investigator:
KonstantineFetfatsidis
Composite Structures Rese
(617) 229-6818
kfetfatsidis@aurora.aero
Business Contact:
ScottHart
Financial Analyst
(617) 500-4892
shart@aurora.aero
Research Institute:
Univ of California, Santa Barbara
Frank Zok
UC Santa Barbara
552 University Road
Santa Barbara, CA, 93106-0002
(805) 893-8699

Abstract
The low weight, excellent durability and heat resistance of ceramic matrix composites (CMCs) make them attractive materials for use in aircraft engine hot sections, where improved overall engine efficiency can be realized. Nevertheless, the interlaminar properties of CMCs must be well understood before CMCs can realistically replace metallic superalloys in engine hot sections, and no standardized test methods for determining interlaminar fracture toughness of CMCs currently exist. During this Phase I effort, Aurora Flight Sciences (AFS) will work closely with experts in CMC fabrication, testing, design, and analysis at the University of California, Santa Barbara (UCSB) and the United Technologies Research Center (UTRC) to develop analytical concept models on interlaminar fracture toughness test methods. A finite element code developed at UCSB, LayerSlayer, will be used in conjunction with the commercially available finite element analysis software, Abaqus, to ascertain stresses, energy release rates and mode mixities in CMCs while conducting parametric studies of various test configurations and geometries feasible for measuring Mode I and Mode II interlaminar fracture toughnesses. Preliminary experiments on CMC specimens will be conducted to evaluate the feasibility of the concept models developed, in preparation for comprehensive testing of several CMC coupons during Phase II.

* information listed above is at the time of submission.

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