Fracture Mode Transition in Unidirectional CFRP

Heru Sb Rochardjo; Jun Komotori; Masao Shimizu; Yasushi Miyano

doi:10.1299/kikaia.61.1540

Fracture Mode Transition in Unidirectional CFRP

Heru Sb Rochardjo, Jun Komotori, Masao Shimizu, Yasushi Miyano

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

Abstract

Longitudinal tensile tests were conducted on necked-on-thickness specimens to clarify the factors affecting fracture mode transition in unidirectional CFRP. Specimens having fiber volume fraction ranging from 30% to 70% were tested in the range of environment temperature from room temperature (23°C) to -150°C, and the fracture morphologies of each specimen were examined. The results revealed that a transition of the fracture mode from interlaminar shear fracture to tensile fracture occurred when the thickness of the necked region (t), fiber volume fraction (Vf) and testing temperature decreased. This transition is due to the change in the relationship between tensile fracture load, P_σ^∗, and interlaminar shear fracture load, P_T^∗. The tensile fracture mode is more likely to occur at low values of Vf, small t and low testing temperature. A three-dimensional fracture mode map showing the effects of these three factors on fracture mode is presented.

Original language	English
Pages (from-to)	1540-1544
Number of pages	5
Journal	Nihon Kikai Gakkai Ronbunshu, A Hen/Transactions of the Japan Society of Mechanical Engineers, Part A
Volume	61
Issue number	587
DOIs	https://doi.org/10.1299/kikaia.61.1540
Publication status	Published - 1995 Jan 1
Externally published	Yes

Keywords

Fiber Volume Fraction
Fracture Mode Transition
Low Temperature
Specimen Configuration
Unidirectional CFRP

ASJC Scopus subject areas

Materials Science(all)
Mechanics of Materials
Mechanical Engineering

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@article{f3718ee01e9247728603b9961312d238,

title = "Fracture Mode Transition in Unidirectional CFRP",

abstract = "Longitudinal tensile tests were conducted on necked-on-thickness specimens to clarify the factors affecting fracture mode transition in unidirectional CFRP. Specimens having fiber volume fraction ranging from 30% to 70% were tested in the range of environment temperature from room temperature (23°C) to -150°C, and the fracture morphologies of each specimen were examined. The results revealed that a transition of the fracture mode from interlaminar shear fracture to tensile fracture occurred when the thickness of the necked region (t), fiber volume fraction (Vf) and testing temperature decreased. This transition is due to the change in the relationship between tensile fracture load, Pσ∗, and interlaminar shear fracture load, PT∗. The tensile fracture mode is more likely to occur at low values of Vf, small t and low testing temperature. A three-dimensional fracture mode map showing the effects of these three factors on fracture mode is presented.",

keywords = "Fiber Volume Fraction, Fracture Mode Transition, Low Temperature, Specimen Configuration, Unidirectional CFRP",

author = "Rochardjo, {Heru Sb} and Jun Komotori and Masao Shimizu and Yasushi Miyano",

year = "1995",

month = jan,

day = "1",

doi = "10.1299/kikaia.61.1540",

language = "English",

volume = "61",

pages = "1540--1544",

journal = "Nihon Kikai Gakkai Ronbunshu, A Hen/Transactions of the Japan Society of Mechanical Engineers, Part A",

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number = "587",

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TY - JOUR

T1 - Fracture Mode Transition in Unidirectional CFRP

AU - Rochardjo, Heru Sb

AU - Komotori, Jun

AU - Shimizu, Masao

AU - Miyano, Yasushi

PY - 1995/1/1

Y1 - 1995/1/1

N2 - Longitudinal tensile tests were conducted on necked-on-thickness specimens to clarify the factors affecting fracture mode transition in unidirectional CFRP. Specimens having fiber volume fraction ranging from 30% to 70% were tested in the range of environment temperature from room temperature (23°C) to -150°C, and the fracture morphologies of each specimen were examined. The results revealed that a transition of the fracture mode from interlaminar shear fracture to tensile fracture occurred when the thickness of the necked region (t), fiber volume fraction (Vf) and testing temperature decreased. This transition is due to the change in the relationship between tensile fracture load, Pσ∗, and interlaminar shear fracture load, PT∗. The tensile fracture mode is more likely to occur at low values of Vf, small t and low testing temperature. A three-dimensional fracture mode map showing the effects of these three factors on fracture mode is presented.

AB - Longitudinal tensile tests were conducted on necked-on-thickness specimens to clarify the factors affecting fracture mode transition in unidirectional CFRP. Specimens having fiber volume fraction ranging from 30% to 70% were tested in the range of environment temperature from room temperature (23°C) to -150°C, and the fracture morphologies of each specimen were examined. The results revealed that a transition of the fracture mode from interlaminar shear fracture to tensile fracture occurred when the thickness of the necked region (t), fiber volume fraction (Vf) and testing temperature decreased. This transition is due to the change in the relationship between tensile fracture load, Pσ∗, and interlaminar shear fracture load, PT∗. The tensile fracture mode is more likely to occur at low values of Vf, small t and low testing temperature. A three-dimensional fracture mode map showing the effects of these three factors on fracture mode is presented.

KW - Fiber Volume Fraction

KW - Fracture Mode Transition

KW - Low Temperature

KW - Specimen Configuration

KW - Unidirectional CFRP

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