501 Evaluation of Fracture Toughness Distribution in Ceramic-Metal Functionally Graded Materials

2005 ◽  
Vol 2005 (0) ◽  
pp. 327-328
Author(s):  
Keiichiro TOHGO ◽  
Mitsuaki YOSHIDA ◽  
Mitsuhisa IIZUKA ◽  
Hiroyasu ARAKI
Keyword(s):  
Fracture Toughness ◽  
Functionally Graded Materials ◽  
Functionally Graded ◽  
Graded Materials

scholarly journals Study on Thermally Induced Crack Propagation Behavior of Functionally Graded Materials Using a Modified Peridynamic Model

2020 ◽  
Vol 2020 ◽  
pp. 1-17
Author(s):  
Fei Wang ◽  
Yu’e Ma ◽  
Yanning Guo ◽  
Wei Huang
Keyword(s):  
Fracture Toughness ◽  
Crack Propagation ◽  
Functionally Graded Materials ◽  
Initial Temperature ◽  
Functionally Graded ◽  
Thermal Crack ◽  
Graded Materials ◽  
Ceramic Fracture ◽  
Thermally Induced ◽  
Peridynamic Model

Peridynamic (PD) theory is used to study the thermally induced cracking behavior of functionally graded materials (FGMs). A modified thermomechanical peridynamic model is developed. The thermal crack propagation of a ceramic slab in quenching is calculated to validate the modified PD model. The results predicted by the modified PD model agree with previously published numerical and experimental ones. Compared with the original PD model, the calculation accuracy of the modified PD model for thermal cracking is improved. The thermal cracking in FGMs is also simulated. The effects of material shape, initial temperature, and ceramic fracture toughness on thermal crack propagation behaviors are studied. It can be found that the thermal cracks in FGMs are still in periodical and hierarchical forms. The metal materials in FGMs can prevent crack initiation and arrest the long cracks. The crack number tends to be increased with the increasing initial temperature, while the strengthened ceramic fracture toughness can decrease it.

Influence of microstructure on fracture toughness distribution in ceramic–metal functionally graded materials

2008 ◽  
Vol 75 (15) ◽  
pp. 4529-4541 ◽  
Author(s):  
Keiichiro Tohgo ◽  
Mitsuhisa Iizuka ◽  
Hiroyasu Araki ◽  
Yoshinobu Shimamura
Keyword(s):  
Fracture Toughness ◽  
Functionally Graded Materials ◽  
Functionally Graded ◽  
Graded Materials

Evaluation of Fracture Toughness Distribution in Ceramic-Metal Functionally Graded Materials

2007 ◽  
Vol 345-346 ◽  
pp. 497-500 ◽  
Author(s):  
Keiichiro Tohgo ◽  
Hiroyasu Araki ◽  
Yoshinobu Shimamura
Keyword(s):  
Fracture Toughness ◽  
Stainless Steel ◽  
Powder Metallurgy ◽  
Austenitic Stainless Steel ◽  
Functionally Graded Materials ◽  
Stable Crack Growth ◽  
Functionally Graded ◽  
Stabilized Zirconia ◽  
Graded Materials ◽  
Conventional Tests

This paper deals with evaluation of fracture toughness in functionally graded materials (FGMs) consisting of partially stabilized zirconia (PSZ) and austenitic stainless steel SUS 304. FGMs and non-graded composites (non-FGMs) with fine and coarse microstructures are fabricated by powder metallurgy using PSZ and two kinds of SUS 304 powders. The fracture toughness is determined by conventional tests for several non-FGMs with each material composition and by a method utilizing stable crack growth for FGMs. Based on the experimental results, fracture mechanism, influences of microstructure on fracture toughness, and difference in fracture toughness between the FGMs and non-FGMs has been discussed.

Dynamic Analysis with Stress Recovery for Functionally Graded Materials: Numerical Simulation and Experimental Benchmarking

2014 ◽  
Vol 2 (1) ◽  
pp. 21
Author(s):  
Carlos Alberto Dutra Fraga Filho ◽  
Fernando César Meira Menandro ◽  
Rivânia Hermógenes Paulino de Romero ◽  
Juan Sérgio Romero Saenz
Keyword(s):  
Numerical Simulation ◽  
Dynamic Analysis ◽  
Functionally Graded Materials ◽  
Functionally Graded ◽  
Stress Recovery ◽  
Graded Materials
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