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Features of the volume change and a new constitutive equation of hydrogels under uniaxial compression
Zhang,YR1,4; Xu KJ1; Bai YL(白以龙)1,3; Tang LQ1,2; Jiang ZY1; Liu YP1; Liu ZJ1; Zhou LC1; Zhou XF4
Source PublicationJOURNAL OF THE MECHANICAL BEHAVIOR OF BIOMEDICAL MATERIALS
2018-09-01
Volume85Pages:181-187
ISSN1751-6161
Abstract

For high-water content hydrogels in compression, the water inside of hydrogels contributes to the response of hydrogels to external loads directly, but part of the water is expelled from hydrogels in the meantime to change the volume of the hydrogel and reduce the contribution. In order to consider the contribution of the water in the constitution equation, PVA (polyvinyl alcohol) hydrogels with high-water content were used as examples, and compressive experiments were carried out to measure both the stress-strain relation and the change of the volume in the meantime. By considering the effect of the difference of the contribution of water in different directions of the hydrogel, we deduced a new constitutive equation, which can pretty well depict the stress-strain of hydrogels with different water contents. The results showed that the contribution of water to the total stress increases with the compression strain and even exceed that of the polymer, although the expelled water reduces the contribution at the early loading stage, which well explains the difference of elastic moduli of hydrogels in compression and tension.

KeywordConstitutive Equation Volume Change Hydrogel
DOI10.1016/j.jmbbm.2018.06.004
Indexed BySCI ; EI
Language英语
WOS IDWOS:000440119800021
WOS KeywordPolyvinyl-alcohol-hydrogel ; Mechanical Characterization ; Articular-cartilage ; Gels ; Model ; Deformation ; Replacement ; Behaviors ; Solvent
WOS Research AreaEngineering ; Materials Science
WOS SubjectEngineering, Biomedical ; Materials Science, bioMaterials
Funding OrganizationNational Natural Science Foundation of China (NSFC)(11472109 ; Natural Science Foundation of Guangdong Province(2015A030311046 ; 11772134) ; 2015B010131009)
Classification二类/q1
Ranking3
Citation statistics
Cited Times:2[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://dspace.imech.ac.cn/handle/311007/77650
Collection非线性力学国家重点实验室
Corresponding AuthorTang LQ
Affiliation1.South China Univ Technol, Sch Civil Engn & Transportat, 381 Wushan Rd, Guangzhou, Guangdong, Peoples R China
2.South China Univ Technol, State Key Lab Subtrop Bldg Sci, 381 Wushan Rd, Guangzhou, Guangdong, Peoples R China
3.Chinese Acad Sci, Inst Mech, LNM, Beijing, Peoples R China
4.Guangdong Inst Intelligent Mfg, Guangzhou, Guangdong, Peoples R China
Recommended Citation
GB/T 7714
Zhang,YR,Xu KJ,Bai YL,et al. Features of the volume change and a new constitutive equation of hydrogels under uniaxial compression[J]. JOURNAL OF THE MECHANICAL BEHAVIOR OF BIOMEDICAL MATERIALS,2018,85:181-187.
APA Zhang,YR.,Xu KJ.,Bai YL.,Tang LQ.,Jiang ZY.,...&Zhou XF.(2018).Features of the volume change and a new constitutive equation of hydrogels under uniaxial compression.JOURNAL OF THE MECHANICAL BEHAVIOR OF BIOMEDICAL MATERIALS,85,181-187.
MLA Zhang,YR,et al."Features of the volume change and a new constitutive equation of hydrogels under uniaxial compression".JOURNAL OF THE MECHANICAL BEHAVIOR OF BIOMEDICAL MATERIALS 85(2018):181-187.
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