Effects of gauge length and strain rate on fracture toughness of olyethylene 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 olyethylene 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 article publication › Journal article › Academic research › peer-review

75 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 (w_e) using Z = 50, 100, 150, 200 and 250 mm, it is observed that w_e is independent of gauge length, except that a slightly lower w_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 w_e with loading rates less than 1 mm/min. But with higher loading rates, w_e showed no strain rate sensitivity.

Original language	English
Pages (from-to)	310-319
Number of pages	10
Journal	Polymer Engineering and Science
Volume	40
Issue number	2
DOIs	https://doi.org/10.1002/pen.11164
Publication status	Published - 2000
Externally published	Yes

ASJC Scopus subject areas

General Chemistry
Polymers and Plastics
Materials Chemistry

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10.1002/pen.11164

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title = "Effects of gauge length and strain rate on fracture toughness of olyethylene 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 (we) using Z = 50, 100, 150, 200 and 250 mm, it is observed that we is independent of gauge length, except that a slightly lower we 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 we with loading rates less than 1 mm/min. But with higher loading rates, we showed no strain rate sensitivity.",

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Effects of gauge length and strain rate on fracture toughness of olyethylene 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, 2000, p. 310-319.

Research output: Journal article publication › Journal article › Academic research › peer-review

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T1 - Effects of gauge length and strain rate on fracture toughness of olyethylene 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

Y1 - 2000

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 (we) using Z = 50, 100, 150, 200 and 250 mm, it is observed that we is independent of gauge length, except that a slightly lower we 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 we with loading rates less than 1 mm/min. But with higher loading rates, we 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 (we) using Z = 50, 100, 150, 200 and 250 mm, it is observed that we is independent of gauge length, except that a slightly lower we 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 we with loading rates less than 1 mm/min. But with higher loading rates, we showed no strain rate sensitivity.

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DO - 10.1002/pen.11164

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JO - Polymer Engineering and Science

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

Abstract

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