Inverse Analysis on the Distribution of Internal Small Defects

Naoya Tada; Ryuichi Ohtani; Takayuki Kitamura; Masaya YAM Ada

doi:10.1299/kikaia.59.381

Inverse Analysis on the Distribution of Internal Small Defects

Naoya Tada, Ryuichi Ohtani, Takayuki Kitamura, Masaya YAM Ada

Research output: Contribution to journal › Article › peer-review

Abstract

This paper deals with a method for predicting the three-dimensional distribution of internal defects from the two-dimensional observation of intercepted defects on an inspection plane by an inverse analysis. At first, the fundamental relationships between them were analytically derived on the basis of a statistical model where multiple penny-shaped cracks in an infinite body were intercepted by an inspection plane. The validity of the method was confirmed by a numerical simulation. It was, moreover, applied to small creep fatigue cracks distributing in a smooth specimen of a Type 304 stainless steel, and the volumetric density and the distribution of crack size were successfully evaluated.

Original language	English
Pages (from-to)	381-386
Number of pages	6
Journal	Transactions of the Japan Society of Mechanical Engineers Series A
Volume	59
Issue number	558
DOIs	https://doi.org/10.1299/kikaia.59.381
Publication status	Published - 1993
Externally published	Yes

Keywords

Creep Cavity
Internal Defects
Inverse Problem
Numerical Analysis
Probabilistic Method
Small Creep Fatigue Cracks
Volumetric Crack Density

ASJC Scopus subject areas

Materials Science(all)
Mechanics of Materials
Mechanical Engineering

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10.1299/kikaia.59.381

Cite this

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title = "Inverse Analysis on the Distribution of Internal Small Defects",

abstract = "This paper deals with a method for predicting the three-dimensional distribution of internal defects from the two-dimensional observation of intercepted defects on an inspection plane by an inverse analysis. At first, the fundamental relationships between them were analytically derived on the basis of a statistical model where multiple penny-shaped cracks in an infinite body were intercepted by an inspection plane. The validity of the method was confirmed by a numerical simulation. It was, moreover, applied to small creep fatigue cracks distributing in a smooth specimen of a Type 304 stainless steel, and the volumetric density and the distribution of crack size were successfully evaluated.",

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year = "1993",

doi = "10.1299/kikaia.59.381",

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pages = "381--386",

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T1 - Inverse Analysis on the Distribution of Internal Small Defects

AU - Tada, Naoya

AU - Ohtani, Ryuichi

AU - Kitamura, Takayuki

AU - Ada, Masaya YAM

PY - 1993

Y1 - 1993

N2 - This paper deals with a method for predicting the three-dimensional distribution of internal defects from the two-dimensional observation of intercepted defects on an inspection plane by an inverse analysis. At first, the fundamental relationships between them were analytically derived on the basis of a statistical model where multiple penny-shaped cracks in an infinite body were intercepted by an inspection plane. The validity of the method was confirmed by a numerical simulation. It was, moreover, applied to small creep fatigue cracks distributing in a smooth specimen of a Type 304 stainless steel, and the volumetric density and the distribution of crack size were successfully evaluated.

AB - This paper deals with a method for predicting the three-dimensional distribution of internal defects from the two-dimensional observation of intercepted defects on an inspection plane by an inverse analysis. At first, the fundamental relationships between them were analytically derived on the basis of a statistical model where multiple penny-shaped cracks in an infinite body were intercepted by an inspection plane. The validity of the method was confirmed by a numerical simulation. It was, moreover, applied to small creep fatigue cracks distributing in a smooth specimen of a Type 304 stainless steel, and the volumetric density and the distribution of crack size were successfully evaluated.

KW - Creep Cavity

KW - Internal Defects

KW - Inverse Problem

KW - Numerical Analysis

KW - Probabilistic Method

KW - Small Creep Fatigue Cracks

KW - Volumetric Crack Density

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JO - Nihon Kikai Gakkai Ronbunshu, A Hen/Transactions of the Japan Society of Mechanical Engineers, Part A

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ER -

Inverse Analysis on the Distribution of Internal Small Defects

Abstract

Keywords

ASJC Scopus subject areas

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