Acoustic Emission-Based Study to Characterize the Crack Initiation Point of Wood Fiber/HDPE Composites
The crack initiation point can be regarded as a sign of composite failure and plays a vital role in the evaluation of fracture toughness. Wood-plastic composites (WPCs) are viscoelastic materials and the evaluation of fracture mechanism and toughness has a great significance in their applications. T...
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doaj-524b240052a740a89b2c5ef8921a75db2020-11-24T22:11:29ZengMDPI AGPolymers2073-43602019-04-0111470110.3390/polym11040701polym11040701Acoustic Emission-Based Study to Characterize the Crack Initiation Point of Wood Fiber/HDPE CompositesYong Guo0Shiliu Zhu1Yuxia Chen2Dian Liu3Dagang Li4School of Forestry and Landscape Architecture, Anhui Agricultural University, Hefei 230036, ChinaSchool of Forestry and Landscape Architecture, Anhui Agricultural University, Hefei 230036, ChinaSchool of Forestry and Landscape Architecture, Anhui Agricultural University, Hefei 230036, ChinaSchool of Forestry and Landscape Architecture, Anhui Agricultural University, Hefei 230036, ChinaCollege of Materials Science and Engineering, Nanjing Forestry University, Nanjing 210037, ChinaThe crack initiation point can be regarded as a sign of composite failure and plays a vital role in the evaluation of fracture toughness. Wood-plastic composites (WPCs) are viscoelastic materials and the evaluation of fracture mechanism and toughness has a great significance in their applications. Therefore, we used the acoustic emission (AE) technique to measure the crack initiation point of the WPCs and evaluate their fracture toughness. The results show that the novel AE-based methods were more effective than the conventional standard methods for characterization of the crack initiation point. Using the relationship of cumulative AE events with time and load, the critical failure load was quickly determined, and then the critical stress intensity factor and fracture toughness were calculated. The fracture toughness of the WPCs increased with an increase in the wood fiber content.https://www.mdpi.com/2073-4360/11/4/701wood fibersfracture toughnessdamage mechanicsacoustic emission |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Yong Guo Shiliu Zhu Yuxia Chen Dian Liu Dagang Li |
spellingShingle |
Yong Guo Shiliu Zhu Yuxia Chen Dian Liu Dagang Li Acoustic Emission-Based Study to Characterize the Crack Initiation Point of Wood Fiber/HDPE Composites Polymers wood fibers fracture toughness damage mechanics acoustic emission |
author_facet |
Yong Guo Shiliu Zhu Yuxia Chen Dian Liu Dagang Li |
author_sort |
Yong Guo |
title |
Acoustic Emission-Based Study to Characterize the Crack Initiation Point of Wood Fiber/HDPE Composites |
title_short |
Acoustic Emission-Based Study to Characterize the Crack Initiation Point of Wood Fiber/HDPE Composites |
title_full |
Acoustic Emission-Based Study to Characterize the Crack Initiation Point of Wood Fiber/HDPE Composites |
title_fullStr |
Acoustic Emission-Based Study to Characterize the Crack Initiation Point of Wood Fiber/HDPE Composites |
title_full_unstemmed |
Acoustic Emission-Based Study to Characterize the Crack Initiation Point of Wood Fiber/HDPE Composites |
title_sort |
acoustic emission-based study to characterize the crack initiation point of wood fiber/hdpe composites |
publisher |
MDPI AG |
series |
Polymers |
issn |
2073-4360 |
publishDate |
2019-04-01 |
description |
The crack initiation point can be regarded as a sign of composite failure and plays a vital role in the evaluation of fracture toughness. Wood-plastic composites (WPCs) are viscoelastic materials and the evaluation of fracture mechanism and toughness has a great significance in their applications. Therefore, we used the acoustic emission (AE) technique to measure the crack initiation point of the WPCs and evaluate their fracture toughness. The results show that the novel AE-based methods were more effective than the conventional standard methods for characterization of the crack initiation point. Using the relationship of cumulative AE events with time and load, the critical failure load was quickly determined, and then the critical stress intensity factor and fracture toughness were calculated. The fracture toughness of the WPCs increased with an increase in the wood fiber content. |
topic |
wood fibers fracture toughness damage mechanics acoustic emission |
url |
https://www.mdpi.com/2073-4360/11/4/701 |
work_keys_str_mv |
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