Mixed-mode-I/II fracture of polytetrafluoroethylene

被引：27

作者：

Brown, Eric N. ^{[1
]}

Rae, Philip J. ^{[1
]}

Liu, Cheng ^{[1
]}

机构：

[1] Los Alamos Natl Lab, Div Mat Sci & Technol, Los Alamos, NM 87545 USA

来源：

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 2007年 / 468卷 / SPEC. ISS.期

关键词：

polytetrafluoroethylene (PTFE); fracture; crystallinity; phase transformation;

D O I：

10.1016/j.msea.2006.09.125

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

The current work deals with mixed-mode-I/II fracture in polytetrafluoroethylene (PTFE). Mode-I fracture in PTFE 7C has previously been shown to exhibit strong phase dependence with a brittle-to-ductile transition associated with the room temperature phase transitions. Increases in fracture toughness around room temperature and above result from the onset of stable fibril formation bridging the crack plane and increased plastic energy dissipation. Mixed-mode-I/II loading conditions are achieved using a modified compact tension specimen with Arcan type fixtures. The fracture toughness delta(VC) of PTFE X exhibits a 42% decrease from pure mode-I to near mode-II loading due to a marked decrease in fibril formation. Published by Elsevier B.V.

引用

页码：253 / 258

页数：6

共 20 条

[1] ELASTIC PLASTIC FRACTURE-BEHAVIOR OF AN ALUMINUM-ALLOY UNDER MIXED-MODE LOADING [J].

AOKI, S ;

KISHIMOTO, K ;

YOSHIDA, T ;

SAKATA, M ;

RICHARD, HA .

JOURNAL OF THE MECHANICS AND PHYSICS OF SOLIDS, 1990, 38 (02) :195-213

[2]

BHATTACHARJEE D, 1994, ACTA METALL MATER, V42, P1745

[3] The role of crystalline phase on fracture and microstructure evolution of polytetrafluoroethylene (PTFE) [J].

Brown, EN ;

Dattelbaum, DM .

POLYMER, 2005, 46 (09) :3056-3068

[4] The effect of crystallinity on the fracture of polytetrafluoroethylene (PTFE) [J].

Brown, Eric N. ;

Rae, Philip J. ;

Orler, E. Bruce ;

Gray, George T., III ;

Dattelbaum, Dana M. .

MATERIALS SCIENCE & ENGINEERING C-BIOMIMETIC AND SUPRAMOLECULAR SYSTEMS, 2006, 26 (08) :1338-1343

[5] DIGITAL IMAGE CORRELATION USING NEWTON-RAPHSON METHOD OF PARTIAL-DIFFERENTIAL CORRECTION [J].

BRUCK, HA ;

MCNEILL, SR ;

SUTTON, MA ;

PETERS, WH .

EXPERIMENTAL MECHANICS, 1989, 29 (03) :261-267

[6]

DalleDonne C, 1997, AM SOC TEST MATER, V1280, P243

[7]

DALLEDONNE C, 2001, J TEST EVAL, V29, P239

[8]

*DUPONT FLUOR TEFL, 1996, PTFE PROP HDB

[9] A FINITE-ELEMENT ANALYSIS OF MIXED-MODE FRACTURE INITIATION BY DUCTILE FAILURE MECHANISMS [J].

GHOSAL, AK ;

NARASIMHAN, R .

JOURNAL OF THE MECHANICS AND PHYSICS OF SOLIDS, 1994, 42 (06) :953-978

[10] Mixed Mode I/II fracture toughness of 2034 aluminum alloys [J].

Kamat, SV ;

Hirth, JP .

ACTA MATERIALIA, 1996, 44 (01) :201-208

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