Characteristics of strength and their relations to flaw size distribution in several ceramic materials. Part 1. Static strength.

Kitazumi, Junichi; Taniguchi, Yoshio; Hoshide, Toshihiko; Yamada, Toshiro

doi:10.2472/jsms.38.1254

Cited by 13 publications

(16 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…It has been reported, however, that the fracture originating from a smaller flaw in ceramics occurs at a lower stress than that predicted on the basis of the planestrain fracture toughness criterion [1][2][3][4]. This suggests that it is dangerous to estimate the strength of a ceramic component by using fracture mechanics parameters obtained for large cracks.…”

Section: Introductionmentioning

confidence: 98%

Dependence of Strength on Size of Flaw Dominating Fracture in Ceramics

Hoshide¹,

Masuda²

1995

Journal of the Society of Materials Science, Japan

Self Cite

View full text Add to dashboard Cite

Bending tests using a silicon nitride and an alumina were carried out under 4-point bending to clarify the relation between the strength and the size of flaw observed at a fracture origin. When the fracture originated from a smaller flaw, the strength was confirmed to be lower than that expected from the fracture toughness criterion. A convenient procedure using the mean strength and the fracture toughness was proposed to estimate the strength degradation depending on flaw size. A new model was also developed assuming the stable cracking caused by the separation per one grain ahead of a flaw prior to the final unstable fracture. A Monte Carlo simulation based on the proposed model was made to explain the anomalous behavior of small flaw. The relation of strength vs. crack length simulated by taking account of grain-size distribution showed good agreement with the experimental result. The lower bound in scatter of strength depending on flaw-size was suggested to be estimated by using the size of the largest grain expected in a material.

show abstract

Section: Introductionmentioning

confidence: 98%

Dependence of Strength on Size of Flaw Dominating Fracture in Ceramics

Hoshide¹,

Masuda²

1995

Journal of the Society of Materials Science, Japan

Self Cite

View full text Add to dashboard Cite

show abstract

“…It is reported [5,9,10,[24][25][26][27][28] that fracture originating from a small flaw of size a in ceramics occurs at a lower stress than the estimated strength of f=KC/l: l is an equivalent crack length defined as l=aM2o [5]. The multiplication factor Mo for Kestimation is determined by a crack geometry and/or a loading mode [ex.…”

Section: Specific Crack Lengthmentioning

confidence: 99%

“…A database on the aforementioned mechanical properties of commercial ceramics was constructed using cataloged data from the databook [3] as well as some data of several ceramics which have been published by the author et al [5][6][7][8][9][10]. The database was compiled in a format of MS-Excel (the registered trademark of Microsoft Corporation) work-sheet so that interrelations among mechanical properties could be analyzed on a personal computer.…”

Section: Construction Of Databasementioning

confidence: 99%

“…[29][30][31][32]. To deal effectively with the overestimation of f for small cracks, the simplest and efficient procedure [9,26] was proposed such as…”

Section: Specific Crack Lengthmentioning

confidence: 99%

“…(13) is convenient from an engineering aspect, lo must be determined experimentally through a tedious fractographic observation [ex. 9,10]. To settle the problem, a reference crack length l* was proposed to be used in estimating lo as follows [10].…”

Section: Specific Crack Lengthmentioning

confidence: 99%

See 2 more Smart Citations

Interrelation Analyses of Mechanical Properties in Commercial Ceramics Using Cataloged Data

Hoshide

1998

Journal of the Society of Materials Science, Japan

Self Cite

View full text Add to dashboard Cite

Under conditions specified in this work, mechanical properties of commercial alumina, silicon carbide, silicon nitride and zirconia ceramics were selected from published manufacturers' catalogs. Numerical data of the selected properties for materials of 254 kinds in total were finally compiled in a computer-readable database. Interrelations among these properties were analyzed by using the database, and analyzed results were discussed. The selected properties of Young's modulus, linear thermal expansion coefficient, bending strength, Vickers hardness and fracture toughness were correlated with an apparent porosity derived from the theoretical and bulk density. Relationships of the selected properties to the porosity were fitted to exponential functions, and a good fitness was confirmed in most of the cases with a few exceptions. In general, every mechanical property tended to decrease with increasing the porosity. Although the hardness variation with respect to the bending strength was expressed by a proportional relationship for alumina and silicon carbide, a power relation was more adequate for silicon nitride and zirconia. The relation between the fracture toughness and the bending strength was fitted to a power function. In this case, a good fitness was identified for silicon carbide and zirconia, though a poor correlation was found for alumina and silicon carbide. A specific crack length, which was used to modify a fracture mechanics criterion for small cracks, was well correlated with the bending strength by a power function.

show abstract

Fatigue Crack Initiation and Propagation in Ceramics

Ueno

Kishimoto

1996

Fracture Mechanics of Ceramics

View full text Add to dashboard Cite

Characteristics of strength and their relations to flaw size distribution in several ceramic materials. Part 1. Static strength.

Cited by 13 publications

References 0 publications

Dependence of Strength on Size of Flaw Dominating Fracture in Ceramics

Dependence of Strength on Size of Flaw Dominating Fracture in Ceramics

Interrelation Analyses of Mechanical Properties in Commercial Ceramics Using Cataloged Data

Fatigue Crack Initiation and Propagation in Ceramics

Contact Info

Product

Resources

About