A strain rate dependent fracture model of 7050 aluminum alloy

Jun Cao; Fuguo Li; Weifeng Ma; Ke Wang; Junjie Ren; Hailiang Nie; Wei Dang

doi:10.3390/met10010003

A strain rate dependent fracture model of 7050 aluminum alloy

Jun Cao, Fuguo Li, Weifeng Ma, Ke Wang, Junjie Ren, Hailiang Nie, Wei Dang

School of Materials Sience and Engineering

China National Petroleum Corporation

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

8 Scopus citations

Abstract

The purpose of this research is to predict fracture loci and fracture forming limit diagrams (FFLDs) considering strain rate for aluminum alloy 7050-T7451. A fracture model coupled Johnson-Cook plasticity model was proposed to investigate its strain rate effect. Furthermore, a hybrid experimental-numerical method was carried out to verify the strain rate-dependent fracture model by using fracture points of uniaxial tension, notched tension, flat-grooved tension, and pure shear specimens. The results show that the fracture points are in accordance with the fracture loci and FFLDs under different strain rates. The increasing strain rate decreases the FFLDs of aluminum alloy 7050-T7451. The difference of force-displacement responses under different strain rates is larger for notched tension and pure shear conditions.

Original language	English
Article number	3
Journal	Metals
Volume	10
Issue number	1
DOIs	https://doi.org/10.3390/met10010003
State	Published - Jan 2020

Keywords

Fracture criterion
Fracture forming limit diagrams
Simulation
Strain rate
Stress state

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10.3390/met10010003

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title = "A strain rate dependent fracture model of 7050 aluminum alloy",

abstract = "The purpose of this research is to predict fracture loci and fracture forming limit diagrams (FFLDs) considering strain rate for aluminum alloy 7050-T7451. A fracture model coupled Johnson-Cook plasticity model was proposed to investigate its strain rate effect. Furthermore, a hybrid experimental-numerical method was carried out to verify the strain rate-dependent fracture model by using fracture points of uniaxial tension, notched tension, flat-grooved tension, and pure shear specimens. The results show that the fracture points are in accordance with the fracture loci and FFLDs under different strain rates. The increasing strain rate decreases the FFLDs of aluminum alloy 7050-T7451. The difference of force-displacement responses under different strain rates is larger for notched tension and pure shear conditions.",

keywords = "Fracture criterion, Fracture forming limit diagrams, Simulation, Strain rate, Stress state",

author = "Jun Cao and Fuguo Li and Weifeng Ma and Ke Wang and Junjie Ren and Hailiang Nie and Wei Dang",

note = "Publisher Copyright: {\textcopyright} 2019 by the authors. Licensee MDPI, Basel, Switzerland.",

year = "2020",

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doi = "10.3390/met10010003",

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TY - JOUR

T1 - A strain rate dependent fracture model of 7050 aluminum alloy

AU - Cao, Jun

AU - Li, Fuguo

AU - Ma, Weifeng

AU - Wang, Ke

AU - Ren, Junjie

AU - Nie, Hailiang

AU - Dang, Wei

PY - 2020/1

Y1 - 2020/1

N2 - The purpose of this research is to predict fracture loci and fracture forming limit diagrams (FFLDs) considering strain rate for aluminum alloy 7050-T7451. A fracture model coupled Johnson-Cook plasticity model was proposed to investigate its strain rate effect. Furthermore, a hybrid experimental-numerical method was carried out to verify the strain rate-dependent fracture model by using fracture points of uniaxial tension, notched tension, flat-grooved tension, and pure shear specimens. The results show that the fracture points are in accordance with the fracture loci and FFLDs under different strain rates. The increasing strain rate decreases the FFLDs of aluminum alloy 7050-T7451. The difference of force-displacement responses under different strain rates is larger for notched tension and pure shear conditions.

AB - The purpose of this research is to predict fracture loci and fracture forming limit diagrams (FFLDs) considering strain rate for aluminum alloy 7050-T7451. A fracture model coupled Johnson-Cook plasticity model was proposed to investigate its strain rate effect. Furthermore, a hybrid experimental-numerical method was carried out to verify the strain rate-dependent fracture model by using fracture points of uniaxial tension, notched tension, flat-grooved tension, and pure shear specimens. The results show that the fracture points are in accordance with the fracture loci and FFLDs under different strain rates. The increasing strain rate decreases the FFLDs of aluminum alloy 7050-T7451. The difference of force-displacement responses under different strain rates is larger for notched tension and pure shear conditions.

KW - Fracture criterion

KW - Fracture forming limit diagrams

KW - Simulation

KW - Strain rate

KW - Stress state

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DO - 10.3390/met10010003

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SN - 2075-4701

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A strain rate dependent fracture model of 7050 aluminum alloy

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Keywords

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