Examination of Size Effects in the Failure Prediction of Ceramic Material

Neal, Donald M.; Lenoe, E. M.

doi:10.1007/978-1-4613-3488-0_24

Cited by 5 publications

(3 citation statements)

References 3 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Tensile test [30][31][32][33][34], rotating disc test [31], ring compression test [3, 32,35] and ring expansion test [36][37][38] [36]. For comparison, the dashed straight lines as seen in Figs.…”

Section: Effects Of Specimen Geometry and Stress State On Strengthmentioning

confidence: 99%

Strength Characteristics of Structural Ceramics

Hoshide

1996

Journal of the Society of Materials Science, Japan

View full text Add to dashboard Cite

In structural ceramics, a remarkable scatter of strength is observed due to brittle behavior in deformation and flaws unavoidably formed during material processing. Therefore, information on strength characteristics of ceramics is required for the mechanical design in their applications to high-performance components. In the present paper, the strength properties of typical ceramics are reviewed from statistical aspects, especially. As for the static strength, general features of ceramic strength are first outlined, and then several factors affecting strength, such as environments, specimen geometry, stress state and machining, are described. The fatigue strength is reviewed in two categories of the static and cyclic fatigue. As one of screening procedures to exclude components with a lower strength, the proof testing in ceramics is described and the problems in the testing are also mentioned.

show abstract

Section: Effects Of Specimen Geometry and Stress State On Strengthmentioning

confidence: 99%

Strength Characteristics of Structural Ceramics

Hoshide

1996

Journal of the Society of Materials Science, Japan

View full text Add to dashboard Cite

show abstract

“…However, previous work 1 suggests that fracture mechanics procedures are not always applicable to describe fracture behaviour of porous ceramics. It is also recognised that the strength properties of ceramic components are affected by their geometric sizes and shapes associated with the loading mode 2–14 . A new approach for porous ceramics is required in the evaluation of the size effect on strength as well as statistical strength properties.…”

Section: Introductionmentioning

confidence: 99%

A statistical approach to strength evaluation incorporating porosity effect for porous ceramics

Hoshide¹,

Abe²

2003

Fatigue Fract Eng Mat Struct

View full text Add to dashboard Cite

It has not been clear whether the conventional effective volume proposed for dense brittle materials can be applied satisfactorily to the strength evaluation of porous ceramics. In the present study, a modified effective volume was proposed by incorporating the porosity effect in the statistical evaluation of strength properties of porous ceramics. The modified effective volume was derived as the conventional effective volume multiplied by a function of porosity p. In this work, a power function of (1 + p)a was adopted as the simplest porosity function. To clarify the applicability of the modified effective volume, bending tests were conducted using smooth and notched specimens of 3 wt% MgO partially stabilised zirconia with six different porosities. The porosity dependence appeared in the relation between the conventional effective volume and the mean strength of various zirconia ceramics with different porosities. The exponent a of the porosity function was determined from experimental data obtained by using identically shaped specimens with distinct porosities, and the modified effective volume was calculated for several types of specimens used in the experiments. It was revealed that the mean strength was almost uniquely correlated with the modified effective volume independent of porosity. The experimental correlation verified the applicability of the modified effective volume to strength evaluation of porous ceramics.

show abstract

“…It has been reported that the shape and/or size of specimen and the loading mode affect strength characteristics in ceramic materials [1][2][3][4][5][6][7][8][9][10][11][12]. For successful applications of ceramics to engineering components, strength characteristics of notched components with an appropriate procedure to estimate them should be also investigated in the relation to the well-known size effect [13].…”

Section: Introductionmentioning

confidence: 99%

Evaluation of Bending Strength Affected by Specimen Geometry in Silicon Nitride

Hoshide

Sano

Honda

1997

Journal of the Society of Materials Science, Japan

View full text Add to dashboard Cite

Four-point bending tests of a gas pressure sintered silicon nitride were conducted using notched specimens with different notch shapes as well as smooth specimens of distinct sizes, and the effect of the specimen geometry on the bending strength was experimentally clarified. The mean strength in smooth specimens could be almost correlated with the effective volume, though the mean strength in notched specimens shifted toward the lower strength side compared with the relation for smooth specimens. From observation of fracture surface, no unique correlation of the strength with the effective volume was suggested to be ascribed to a difference in flaw morphology between smooth and notched specimens. To discuss the efficiency of the effective volume, a Monte Carlo simulation was also carried out by assuming the same distribution characteristics of cracks in a material. The simulated result revealed that the effect of the specimen geometry on the strength was explained by using the effective volume. The effective volume, however, was found to be inefficient because of a failure of the primitive assumption in the Weibull theory when the flaw density was extremely low in a material.

show abstract

Examination of Size Effects in the Failure Prediction of Ceramic Material

Cited by 5 publications

References 3 publications

Strength Characteristics of Structural Ceramics

Strength Characteristics of Structural Ceramics

A statistical approach to strength evaluation incorporating porosity effect for porous ceramics

Evaluation of Bending Strength Affected by Specimen Geometry in Silicon Nitride

Contact Info

Product

Resources

About