Fracture analysis of ductile elastic-plastic materials under mixed-mode I-II loading

Research output: Chapter in Book/Report/Conference proceedingConference article in proceedingsScientificpeer-review

Abstract

In order to evaluate the mixed-mode fracture behavior of elastic-plastic metallic materials, experimental tests and numerical calculations were carried out. Since the transition of fracture toughness between opening and in-plane shear modes with ductile materials is a question of controversy, single-edge notched bend (SENB) specimens were subjected to asymmetric four-point bending (ASFPB) to provide various mode portions using four materials: A533B pressure vessel steel, F82H ferritic stainless steel, sensitized AISI 304 austenitic stainless steel and CuAl25 copper alloy. Fracture resistance curves were determined and fractographical studies performed. Numerical studies focused on determining the J-integral and stress intensity factor (SIF) solutions for the experimental programme and the Gurson-Tvergaard constitutive model was used to simulate continuum features of the fracture process. The results demonstrate that mode II fracture toughness of ductile metallic materials can be significantly lower than mode I fracture toughness. Studies of the micromechanical aspects of fracture demonstrate the factors and variables responsible for the behavior noted in this investigation.
Original languageEnglish
Title of host publicationRATU2: The Finnish Research Programme on the Structural Integrity of Nuclear Power Plants
Subtitle of host publicationSynthesis of achievements 1995-1998
Place of PublicationEspoo
PublisherVTT Technical Research Centre of Finland
Pages45-75
ISBN (Electronic)951-38-5264-4
ISBN (Print)951-38-5263-6
Publication statusPublished - 1998
MoE publication typeA4 Article in a conference publication
EventRATU2: The Finnish Research Programme on the Structural Integrity of Nuclear Power Plants: Synthesis of achievements 1995−1998 - Espoo, Finland
Duration: 7 Dec 19987 Dec 1998

Publication series

SeriesVTT Symposium
Number190
ISSN0357-9387

Conference

ConferenceRATU2: The Finnish Research Programme on the Structural Integrity of Nuclear Power Plants
CountryFinland
CityEspoo
Period7/12/987/12/98

Fingerprint

Fracture toughness
Plastics
Copper alloys
Ferritic steel
Steel structures
Austenitic stainless steel
Constitutive models
Stress intensity factors
Stainless steel

Cite this

Laukkanen, A. (1998). Fracture analysis of ductile elastic-plastic materials under mixed-mode I-II loading. In RATU2: The Finnish Research Programme on the Structural Integrity of Nuclear Power Plants: Synthesis of achievements 1995-1998 (pp. 45-75). Espoo: VTT Technical Research Centre of Finland. VTT Symposium, No. 190
Laukkanen, Anssi. / Fracture analysis of ductile elastic-plastic materials under mixed-mode I-II loading. RATU2: The Finnish Research Programme on the Structural Integrity of Nuclear Power Plants: Synthesis of achievements 1995-1998. Espoo : VTT Technical Research Centre of Finland, 1998. pp. 45-75 (VTT Symposium; No. 190).
@inproceedings{3d19d681fc7e4ef2b93384739b85b867,
title = "Fracture analysis of ductile elastic-plastic materials under mixed-mode I-II loading",
abstract = "In order to evaluate the mixed-mode fracture behavior of elastic-plastic metallic materials, experimental tests and numerical calculations were carried out. Since the transition of fracture toughness between opening and in-plane shear modes with ductile materials is a question of controversy, single-edge notched bend (SENB) specimens were subjected to asymmetric four-point bending (ASFPB) to provide various mode portions using four materials: A533B pressure vessel steel, F82H ferritic stainless steel, sensitized AISI 304 austenitic stainless steel and CuAl25 copper alloy. Fracture resistance curves were determined and fractographical studies performed. Numerical studies focused on determining the J-integral and stress intensity factor (SIF) solutions for the experimental programme and the Gurson-Tvergaard constitutive model was used to simulate continuum features of the fracture process. The results demonstrate that mode II fracture toughness of ductile metallic materials can be significantly lower than mode I fracture toughness. Studies of the micromechanical aspects of fracture demonstrate the factors and variables responsible for the behavior noted in this investigation.",
author = "Anssi Laukkanen",
year = "1998",
language = "English",
isbn = "951-38-5263-6",
series = "VTT Symposium",
publisher = "VTT Technical Research Centre of Finland",
number = "190",
pages = "45--75",
booktitle = "RATU2: The Finnish Research Programme on the Structural Integrity of Nuclear Power Plants",
address = "Finland",

}

Laukkanen, A 1998, Fracture analysis of ductile elastic-plastic materials under mixed-mode I-II loading. in RATU2: The Finnish Research Programme on the Structural Integrity of Nuclear Power Plants: Synthesis of achievements 1995-1998. VTT Technical Research Centre of Finland, Espoo, VTT Symposium, no. 190, pp. 45-75, RATU2: The Finnish Research Programme on the Structural Integrity of Nuclear Power Plants, Espoo, Finland, 7/12/98.

Fracture analysis of ductile elastic-plastic materials under mixed-mode I-II loading. / Laukkanen, Anssi.

RATU2: The Finnish Research Programme on the Structural Integrity of Nuclear Power Plants: Synthesis of achievements 1995-1998. Espoo : VTT Technical Research Centre of Finland, 1998. p. 45-75 (VTT Symposium; No. 190).

Research output: Chapter in Book/Report/Conference proceedingConference article in proceedingsScientificpeer-review

TY - GEN

T1 - Fracture analysis of ductile elastic-plastic materials under mixed-mode I-II loading

AU - Laukkanen, Anssi

PY - 1998

Y1 - 1998

N2 - In order to evaluate the mixed-mode fracture behavior of elastic-plastic metallic materials, experimental tests and numerical calculations were carried out. Since the transition of fracture toughness between opening and in-plane shear modes with ductile materials is a question of controversy, single-edge notched bend (SENB) specimens were subjected to asymmetric four-point bending (ASFPB) to provide various mode portions using four materials: A533B pressure vessel steel, F82H ferritic stainless steel, sensitized AISI 304 austenitic stainless steel and CuAl25 copper alloy. Fracture resistance curves were determined and fractographical studies performed. Numerical studies focused on determining the J-integral and stress intensity factor (SIF) solutions for the experimental programme and the Gurson-Tvergaard constitutive model was used to simulate continuum features of the fracture process. The results demonstrate that mode II fracture toughness of ductile metallic materials can be significantly lower than mode I fracture toughness. Studies of the micromechanical aspects of fracture demonstrate the factors and variables responsible for the behavior noted in this investigation.

AB - In order to evaluate the mixed-mode fracture behavior of elastic-plastic metallic materials, experimental tests and numerical calculations were carried out. Since the transition of fracture toughness between opening and in-plane shear modes with ductile materials is a question of controversy, single-edge notched bend (SENB) specimens were subjected to asymmetric four-point bending (ASFPB) to provide various mode portions using four materials: A533B pressure vessel steel, F82H ferritic stainless steel, sensitized AISI 304 austenitic stainless steel and CuAl25 copper alloy. Fracture resistance curves were determined and fractographical studies performed. Numerical studies focused on determining the J-integral and stress intensity factor (SIF) solutions for the experimental programme and the Gurson-Tvergaard constitutive model was used to simulate continuum features of the fracture process. The results demonstrate that mode II fracture toughness of ductile metallic materials can be significantly lower than mode I fracture toughness. Studies of the micromechanical aspects of fracture demonstrate the factors and variables responsible for the behavior noted in this investigation.

M3 - Conference article in proceedings

SN - 951-38-5263-6

T3 - VTT Symposium

SP - 45

EP - 75

BT - RATU2: The Finnish Research Programme on the Structural Integrity of Nuclear Power Plants

PB - VTT Technical Research Centre of Finland

CY - Espoo

ER -

Laukkanen A. Fracture analysis of ductile elastic-plastic materials under mixed-mode I-II loading. In RATU2: The Finnish Research Programme on the Structural Integrity of Nuclear Power Plants: Synthesis of achievements 1995-1998. Espoo: VTT Technical Research Centre of Finland. 1998. p. 45-75. (VTT Symposium; No. 190).