Effects of gauge length and strain rate on fracture toughness of Polyethylene Terephthalate Glycol (PETG) film using the essential work of fracture analysis

Emma C. Y. Ching; Robert K. Y. Li; Yiu-Wing Mai

doi:10.1002/pen.11164

Effects of gauge length and strain rate on fracture toughness of Polyethylene Terephthalate Glycol (PETG) film using the essential work of fracture analysis

Emma C. Y. Ching, Robert K. Y. Li, Yiu-Wing Mai

Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review

77 Citations (Scopus)

Abstract

Essential Work of Fracture (EWF) analysis was used to study the fracture toughness of a PETG film. In the study of the gauge length (Z) effect on the specific essential work (ω_e) using Z = 50, 100, 150, 200 and 250 mm, it is observed that ω_e is independent of gauge length, except that a slightly lower ω_e value was measured for Z = 50 mm. Interestingly, for specimens with long gauge lengths (Z ≥ 150 mm in this study), brittle fracture occurred. The minimum ligament length at which ductile/brittle transition took place was observed to decrease with increasing gauge length. There is a small strain rate effect on ω_e with loading rates less than 1 mm/min. But with higher loading rates, ω_e showed no strain rate sensitivity.

Original language	English
Pages (from-to)	310-319
Journal	Polymer Engineering and Science
Volume	40
Issue number	2
DOIs	https://doi.org/10.1002/pen.11164
Publication status	Published - Feb 2000

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title = "Effects of gauge length and strain rate on fracture toughness of Polyethylene Terephthalate Glycol (PETG) film using the essential work of fracture analysis",

abstract = "Essential Work of Fracture (EWF) analysis was used to study the fracture toughness of a PETG film. In the study of the gauge length (Z) effect on the specific essential work (ωe) using Z = 50, 100, 150, 200 and 250 mm, it is observed that ωe is independent of gauge length, except that a slightly lower ωe value was measured for Z = 50 mm. Interestingly, for specimens with long gauge lengths (Z ≥ 150 mm in this study), brittle fracture occurred. The minimum ligament length at which ductile/brittle transition took place was observed to decrease with increasing gauge length. There is a small strain rate effect on ωe with loading rates less than 1 mm/min. But with higher loading rates, ωe showed no strain rate sensitivity.",

author = "Ching, {Emma C. Y.} and Li, {Robert K. Y.} and Yiu-Wing Mai",

year = "2000",

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doi = "10.1002/pen.11164",

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volume = "40",

pages = "310--319",

journal = "Polymer Engineering and Science",

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Effects of gauge length and strain rate on fracture toughness of Polyethylene Terephthalate Glycol (PETG) film using the essential work of fracture analysis. / Ching, Emma C. Y.; Li, Robert K. Y.; Mai, Yiu-Wing.
In: Polymer Engineering and Science, Vol. 40, No. 2, 02.2000, p. 310-319.

Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review

TY - JOUR

T1 - Effects of gauge length and strain rate on fracture toughness of Polyethylene Terephthalate Glycol (PETG) film using the essential work of fracture analysis

AU - Ching, Emma C. Y.

AU - Li, Robert K. Y.

AU - Mai, Yiu-Wing

PY - 2000/2

Y1 - 2000/2

N2 - Essential Work of Fracture (EWF) analysis was used to study the fracture toughness of a PETG film. In the study of the gauge length (Z) effect on the specific essential work (ωe) using Z = 50, 100, 150, 200 and 250 mm, it is observed that ωe is independent of gauge length, except that a slightly lower ωe value was measured for Z = 50 mm. Interestingly, for specimens with long gauge lengths (Z ≥ 150 mm in this study), brittle fracture occurred. The minimum ligament length at which ductile/brittle transition took place was observed to decrease with increasing gauge length. There is a small strain rate effect on ωe with loading rates less than 1 mm/min. But with higher loading rates, ωe showed no strain rate sensitivity.

AB - Essential Work of Fracture (EWF) analysis was used to study the fracture toughness of a PETG film. In the study of the gauge length (Z) effect on the specific essential work (ωe) using Z = 50, 100, 150, 200 and 250 mm, it is observed that ωe is independent of gauge length, except that a slightly lower ωe value was measured for Z = 50 mm. Interestingly, for specimens with long gauge lengths (Z ≥ 150 mm in this study), brittle fracture occurred. The minimum ligament length at which ductile/brittle transition took place was observed to decrease with increasing gauge length. There is a small strain rate effect on ωe with loading rates less than 1 mm/min. But with higher loading rates, ωe showed no strain rate sensitivity.

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U2 - 10.1002/pen.11164

DO - 10.1002/pen.11164

M3 - RGC 21 - Publication in refereed journal

SN - 0032-3888

VL - 40

SP - 310

EP - 319

JO - Polymer Engineering and Science

JF - Polymer Engineering and Science

IS - 2

ER -

Effects of gauge length and strain rate on fracture toughness of Polyethylene Terephthalate Glycol (PETG) film using the essential work of fracture analysis

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