Experimental investigation of porosity in carbon/epoxy composite laminates

Boming Zhang; Ling Liu; Zhanjun Wu; Dianfu Wang

doi:10.1016/B978-1-85573-831-7.50026-2

Experimental investigation of porosity in carbon/epoxy composite laminates

Boming Zhang^*
, Ling Liu
, Zhanjun Wu
, Dianfu Wang

^*Corresponding author for this work

Harbin Institute of Technology

Research output: Chapter in Book/Report/Conference proceeding › Chapter › peer-review

Abstract

Presence of porosity in composite laminates is mainly due to the improper control of processing parameters. Pressures in autoclave process are usually applied to minimize void percentage. An experimental program was designed to investigate the effects of cure pressures on the void contents. Qualitative and quantitative characteristics of porosity in terms of void distribution, shape, size and volume fraction was carried out by ultrasonic C-scan, microscopic analysis and acid digestion method. Effects of porosity on the interlaminar shear strength for the laminates were discussed. The results show that there is a decrease of 35% in ILSS when the void content goes from 0 to 4%, each 1% increase in void content decreases ILSS approximately by 8.5% for this material, and the effects of porosity on the strength mainly contribute to the void content, void distribution, size and shape, and the void content has little connection with the generation method.

Original language	English
Title of host publication	Composite Technologies for 2020
Subtitle of host publication	Proceedings of the Fourth Asian-Australasian Conference on Composite Materials (ACCM 4)
Publisher	Elsevier
Pages	118-123
Number of pages	6
ISBN (Electronic)	9781855738317
DOIs	https://doi.org/10.1016/B978-1-85573-831-7.50026-2
State	Published - 1 Jun 2004
Externally published	Yes

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10.1016/B978-1-85573-831-7.50026-2

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title = "Experimental investigation of porosity in carbon/epoxy composite laminates",

abstract = "Presence of porosity in composite laminates is mainly due to the improper control of processing parameters. Pressures in autoclave process are usually applied to minimize void percentage. An experimental program was designed to investigate the effects of cure pressures on the void contents. Qualitative and quantitative characteristics of porosity in terms of void distribution, shape, size and volume fraction was carried out by ultrasonic C-scan, microscopic analysis and acid digestion method. Effects of porosity on the interlaminar shear strength for the laminates were discussed. The results show that there is a decrease of 35\% in ILSS when the void content goes from 0 to 4\%, each 1\% increase in void content decreases ILSS approximately by 8.5\% for this material, and the effects of porosity on the strength mainly contribute to the void content, void distribution, size and shape, and the void content has little connection with the generation method.",

author = "Boming Zhang and Ling Liu and Zhanjun Wu and Dianfu Wang",

year = "2004",

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day = "1",

doi = "10.1016/B978-1-85573-831-7.50026-2",

language = "英语",

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AU - Zhang, Boming

AU - Liu, Ling

AU - Wu, Zhanjun

AU - Wang, Dianfu

PY - 2004/6/1

Y1 - 2004/6/1

N2 - Presence of porosity in composite laminates is mainly due to the improper control of processing parameters. Pressures in autoclave process are usually applied to minimize void percentage. An experimental program was designed to investigate the effects of cure pressures on the void contents. Qualitative and quantitative characteristics of porosity in terms of void distribution, shape, size and volume fraction was carried out by ultrasonic C-scan, microscopic analysis and acid digestion method. Effects of porosity on the interlaminar shear strength for the laminates were discussed. The results show that there is a decrease of 35% in ILSS when the void content goes from 0 to 4%, each 1% increase in void content decreases ILSS approximately by 8.5% for this material, and the effects of porosity on the strength mainly contribute to the void content, void distribution, size and shape, and the void content has little connection with the generation method.

AB - Presence of porosity in composite laminates is mainly due to the improper control of processing parameters. Pressures in autoclave process are usually applied to minimize void percentage. An experimental program was designed to investigate the effects of cure pressures on the void contents. Qualitative and quantitative characteristics of porosity in terms of void distribution, shape, size and volume fraction was carried out by ultrasonic C-scan, microscopic analysis and acid digestion method. Effects of porosity on the interlaminar shear strength for the laminates were discussed. The results show that there is a decrease of 35% in ILSS when the void content goes from 0 to 4%, each 1% increase in void content decreases ILSS approximately by 8.5% for this material, and the effects of porosity on the strength mainly contribute to the void content, void distribution, size and shape, and the void content has little connection with the generation method.

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BT - Composite Technologies for 2020

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ER -

Experimental investigation of porosity in carbon/epoxy composite laminates

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