Fracture Toughness Prediction for MWCNT Reinforced Ceramics

Henager, Charles H. ; Nguyen, Ba Nghiep

Pacific Northwest National Laboratory (U.S.)

关键词: Micromechanics;    Micromechanics;    Fracture Toughness;    Carbon Nanotubes;    Carbon Nanotubes;   

DOI  :  10.2172/1118114
RP-ID  :  PNNL-22765
RP-ID  :  AC05-76RL01830
RP-ID  :  1118114

美国|英语

来源: UNT Digital Library

【 摘 要 】

This report describes the development of a micromechanics model to predict fracture toughness of multiwall carbon nanotube (MWCNT) reinforced ceramic composites to guide future experimental work for this project. The modeling work described in this report includes (i) prediction of elastic properties, (ii) development of a mechanistic damage model accounting for matrix cracking to predict the composite nonlinear stress/strain response to tensile loading to failure, and (iii) application of this damage model in a modified boundary layer (MBL) analysis using ABAQUS to predict fracture toughness and crack resistance behavior (R-curves) for ceramic materials containing MWCNTs at various volume fractions.