Deformation and Failure Mechanism of Particulate Filled and Short Fiber Reinforced Thermoplastics: Detection and Analysis by Acoustic Emission Testing

Acoustic emission, the detection of signals during deformation, is a frequently used method for the study of local deformation processes occurring in heterogeneous polymer systems. Most of these processes result in the evolution of elastic waves which can be detected by appropriate sensors. The anal...

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Autores principales:	Milán Ferdinánd, Róbert Várdai, János Móczó, Béla Pukánszky
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	acoustic emission testing local processes polymer composite deformation failure debonding Organic chemistry QD241-441
Acceso en línea:	https://doaj.org/article/d9ab4c4c1b8f4f438ad9e829581d779a
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spelling	oai:doaj.org-article:d9ab4c4c1b8f4f438ad9e829581d779a2021-11-25T18:48:26ZDeformation and Failure Mechanism of Particulate Filled and Short Fiber Reinforced Thermoplastics: Detection and Analysis by Acoustic Emission Testing10.3390/polym132239312073-4360https://doaj.org/article/d9ab4c4c1b8f4f438ad9e829581d779a2021-11-01T00:00:00Zhttps://www.mdpi.com/2073-4360/13/22/3931https://doaj.org/toc/2073-4360Acoustic emission, the detection of signals during deformation, is a frequently used method for the study of local deformation processes occurring in heterogeneous polymer systems. Most of these processes result in the evolution of elastic waves which can be detected by appropriate sensors. The analysis of several parameters characterizing the waves offers valuable information about the possible deformation mechanism. The acoustic emission testing of composites may yield very different number of signals from a few hundred to more than 100,000. This latter was proved to be affected mainly by particle size, interfacial adhesion and composition, but other factors, such as matrix modulus and specimen size, also influence it. Local deformation processes are claimed to have a strong effect on macroscopic properties. Indeed, a close correlation was found between the initiation stress of the dominating particle related process derived from acoustic emission testing and the tensile strength in both polypropylene (PP) and poly(lactic acid) (PLA) composites. However, in polyamide (PA)-based heterogeneous polymer systems, deformations related to the matrix dominated composite properties. Besides forecasting failure, the method makes possible the determination of the inherent strength of lignocellulosic fibers being around 40 MPa as well as the quantitative estimation of adhesion strength for composites in which interactions are created by mechanisms other than secondary forces. The proposed approach based on acoustic emission testing proved that in PP/CaCO<sub>3</sub> composites, the strength of adhesion can be increased by ten times from about 100 mJ/m<sup>2</sup> to almost 1000 mJ/m<sup>2</sup> in the presence of a functionalized polymer.Milán FerdinándRóbert VárdaiJános MóczóBéla PukánszkyMDPI AGarticleacoustic emission testinglocal processespolymer compositedeformationfailuredebondingOrganic chemistryQD241-441ENPolymers, Vol 13, Iss 3931, p 3931 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	acoustic emission testing local processes polymer composite deformation failure debonding Organic chemistry QD241-441
spellingShingle	acoustic emission testing local processes polymer composite deformation failure debonding Organic chemistry QD241-441 Milán Ferdinánd Róbert Várdai János Móczó Béla Pukánszky Deformation and Failure Mechanism of Particulate Filled and Short Fiber Reinforced Thermoplastics: Detection and Analysis by Acoustic Emission Testing
description	Acoustic emission, the detection of signals during deformation, is a frequently used method for the study of local deformation processes occurring in heterogeneous polymer systems. Most of these processes result in the evolution of elastic waves which can be detected by appropriate sensors. The analysis of several parameters characterizing the waves offers valuable information about the possible deformation mechanism. The acoustic emission testing of composites may yield very different number of signals from a few hundred to more than 100,000. This latter was proved to be affected mainly by particle size, interfacial adhesion and composition, but other factors, such as matrix modulus and specimen size, also influence it. Local deformation processes are claimed to have a strong effect on macroscopic properties. Indeed, a close correlation was found between the initiation stress of the dominating particle related process derived from acoustic emission testing and the tensile strength in both polypropylene (PP) and poly(lactic acid) (PLA) composites. However, in polyamide (PA)-based heterogeneous polymer systems, deformations related to the matrix dominated composite properties. Besides forecasting failure, the method makes possible the determination of the inherent strength of lignocellulosic fibers being around 40 MPa as well as the quantitative estimation of adhesion strength for composites in which interactions are created by mechanisms other than secondary forces. The proposed approach based on acoustic emission testing proved that in PP/CaCO<sub>3</sub> composites, the strength of adhesion can be increased by ten times from about 100 mJ/m<sup>2</sup> to almost 1000 mJ/m<sup>2</sup> in the presence of a functionalized polymer.
format	article
author	Milán Ferdinánd Róbert Várdai János Móczó Béla Pukánszky
author_facet	Milán Ferdinánd Róbert Várdai János Móczó Béla Pukánszky
author_sort	Milán Ferdinánd
title	Deformation and Failure Mechanism of Particulate Filled and Short Fiber Reinforced Thermoplastics: Detection and Analysis by Acoustic Emission Testing
title_short	Deformation and Failure Mechanism of Particulate Filled and Short Fiber Reinforced Thermoplastics: Detection and Analysis by Acoustic Emission Testing
title_full	Deformation and Failure Mechanism of Particulate Filled and Short Fiber Reinforced Thermoplastics: Detection and Analysis by Acoustic Emission Testing
title_fullStr	Deformation and Failure Mechanism of Particulate Filled and Short Fiber Reinforced Thermoplastics: Detection and Analysis by Acoustic Emission Testing
title_full_unstemmed	Deformation and Failure Mechanism of Particulate Filled and Short Fiber Reinforced Thermoplastics: Detection and Analysis by Acoustic Emission Testing
title_sort	deformation and failure mechanism of particulate filled and short fiber reinforced thermoplastics: detection and analysis by acoustic emission testing
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/d9ab4c4c1b8f4f438ad9e829581d779a
work_keys_str_mv	AT milanferdinand deformationandfailuremechanismofparticulatefilledandshortfiberreinforcedthermoplasticsdetectionandanalysisbyacousticemissiontesting AT robertvardai deformationandfailuremechanismofparticulatefilledandshortfiberreinforcedthermoplasticsdetectionandanalysisbyacousticemissiontesting AT janosmoczo deformationandfailuremechanismofparticulatefilledandshortfiberreinforcedthermoplasticsdetectionandanalysisbyacousticemissiontesting AT belapukanszky deformationandfailuremechanismofparticulatefilledandshortfiberreinforcedthermoplasticsdetectionandanalysisbyacousticemissiontesting
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Deformation and Failure Mechanism of Particulate Filled and Short Fiber Reinforced Thermoplastics: Detection and Analysis by Acoustic Emission Testing

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