Cargando…

Experimental Investigation and Constitutive Modeling of the Uncured Rubber Compound Based on the DMA Strain Scanning Method

Existing research tends to focus on the performance of cured rubber. This is due to a lack of suitable testing methods for the mechanical properties of uncured rubber, in particular, tensile properties. Without crosslinking by sulfur, the tensile strength of uncured rubber compounds is too low to be...

Descripción completa

Detalles Bibliográficos
Autores principales: Li, Yong, Sun, Xunhua, Zhang, Shoudong, Miao, Yanan, Han, Shanling
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2020
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7697930/
https://www.ncbi.nlm.nih.gov/pubmed/33207716
http://dx.doi.org/10.3390/polym12112700
_version_ 1783615711844761600
author Li, Yong
Sun, Xunhua
Zhang, Shoudong
Miao, Yanan
Han, Shanling
author_facet Li, Yong
Sun, Xunhua
Zhang, Shoudong
Miao, Yanan
Han, Shanling
author_sort Li, Yong
collection PubMed
description Existing research tends to focus on the performance of cured rubber. This is due to a lack of suitable testing methods for the mechanical properties of uncured rubber, in particular, tensile properties. Without crosslinking by sulfur, the tensile strength of uncured rubber compounds is too low to be accurately tested by general tensile testing machines. Firstly, a new tensile stress testing method for uncured rubber was established by using dynamic thermomechanical analysis (DMA) tensile strain scanning. The strain amplitude was increased under a set frequency and constant temperature. The corresponding dynamic force needed to maintain the amplitude was then measured to obtain the dynamic force-amplitude curve observed at this temperature and frequency. Secondly, the Burgers model is usually difficult to calculate and analyze in differential form, so it was reduced to its arithmetic form under creep conditions and material relaxation. Tensile deformation at a constant strain rate was proposed, so the Burgers model could be modified to a more concise form without any strain terms, making mathematical processing and simulating much more convenient. Thirdly, the rate of the modified Burgers model under constant strain was in good agreement with the test data, demonstrating that the elastic stiffness was 1–2 orders of magnitude less than the tensile viscosity. In the end, it was concluded that large data dispersion caused by the universal tensile test can be overcome by choosing this model, and it may become an effective way to study the tensile modeling of uncured rubber compound.
format Online
Article
Text
id pubmed-7697930
institution National Center for Biotechnology Information
language English
publishDate 2020
publisher MDPI
record_format MEDLINE/PubMed
spelling pubmed-76979302020-11-29 Experimental Investigation and Constitutive Modeling of the Uncured Rubber Compound Based on the DMA Strain Scanning Method Li, Yong Sun, Xunhua Zhang, Shoudong Miao, Yanan Han, Shanling Polymers (Basel) Article Existing research tends to focus on the performance of cured rubber. This is due to a lack of suitable testing methods for the mechanical properties of uncured rubber, in particular, tensile properties. Without crosslinking by sulfur, the tensile strength of uncured rubber compounds is too low to be accurately tested by general tensile testing machines. Firstly, a new tensile stress testing method for uncured rubber was established by using dynamic thermomechanical analysis (DMA) tensile strain scanning. The strain amplitude was increased under a set frequency and constant temperature. The corresponding dynamic force needed to maintain the amplitude was then measured to obtain the dynamic force-amplitude curve observed at this temperature and frequency. Secondly, the Burgers model is usually difficult to calculate and analyze in differential form, so it was reduced to its arithmetic form under creep conditions and material relaxation. Tensile deformation at a constant strain rate was proposed, so the Burgers model could be modified to a more concise form without any strain terms, making mathematical processing and simulating much more convenient. Thirdly, the rate of the modified Burgers model under constant strain was in good agreement with the test data, demonstrating that the elastic stiffness was 1–2 orders of magnitude less than the tensile viscosity. In the end, it was concluded that large data dispersion caused by the universal tensile test can be overcome by choosing this model, and it may become an effective way to study the tensile modeling of uncured rubber compound. MDPI 2020-11-16 /pmc/articles/PMC7697930/ /pubmed/33207716 http://dx.doi.org/10.3390/polym12112700 Text en © 2020 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Li, Yong
Sun, Xunhua
Zhang, Shoudong
Miao, Yanan
Han, Shanling
Experimental Investigation and Constitutive Modeling of the Uncured Rubber Compound Based on the DMA Strain Scanning Method
title Experimental Investigation and Constitutive Modeling of the Uncured Rubber Compound Based on the DMA Strain Scanning Method
title_full Experimental Investigation and Constitutive Modeling of the Uncured Rubber Compound Based on the DMA Strain Scanning Method
title_fullStr Experimental Investigation and Constitutive Modeling of the Uncured Rubber Compound Based on the DMA Strain Scanning Method
title_full_unstemmed Experimental Investigation and Constitutive Modeling of the Uncured Rubber Compound Based on the DMA Strain Scanning Method
title_short Experimental Investigation and Constitutive Modeling of the Uncured Rubber Compound Based on the DMA Strain Scanning Method
title_sort experimental investigation and constitutive modeling of the uncured rubber compound based on the dma strain scanning method
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7697930/
https://www.ncbi.nlm.nih.gov/pubmed/33207716
http://dx.doi.org/10.3390/polym12112700
work_keys_str_mv AT liyong experimentalinvestigationandconstitutivemodelingoftheuncuredrubbercompoundbasedonthedmastrainscanningmethod
AT sunxunhua experimentalinvestigationandconstitutivemodelingoftheuncuredrubbercompoundbasedonthedmastrainscanningmethod
AT zhangshoudong experimentalinvestigationandconstitutivemodelingoftheuncuredrubbercompoundbasedonthedmastrainscanningmethod
AT miaoyanan experimentalinvestigationandconstitutivemodelingoftheuncuredrubbercompoundbasedonthedmastrainscanningmethod
AT hanshanling experimentalinvestigationandconstitutivemodelingoftheuncuredrubbercompoundbasedonthedmastrainscanningmethod