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akron1280198428.pdf (18.73 MB)
ETD Abstract Container
Abstract Header
Damage and Fatigue in Cross-Linked Rubbers
Author Info
Melnikov, Alexei
Permalink:
http://rave.ohiolink.edu/etdc/view?acc_num=akron1280198428
Abstract Details
Year and Degree
2010, Doctor of Philosophy, University of Akron, Polymer Engineering.
Abstract
Damage and fatigue of elastomers have not been fundamentally understood because of the complex nature of these materials. All currently existing models are completely phenomenological. Therefore two problems have been investigated in this research to address those fundamental issues. The first problem was creating an innovative concept with a mathematical modeling, which would be able to describe the damage using molecular characteristics of elastomers. The second problem is developing new approaches to study fatigue, and especially impact fatigue of elastomers. The following results have been obtained in this research. A theoretical model of damage has been developed which involves the basic molecular characteristics of cross-linked elastomers and takes into account the effects of viscoelasticity and stress-induced crystallization. This model was found very reliable and successful in description of numerous quasi-static simple extension experiments for monotonous and repeating loadings. It also roughly predicts in molecular terms the failure of elastomers with various degrees of cross-linking. Quasi-impact fatigue tests with different geometry of an indenter have also been performed. Some microscopic features of rubber damage have been investigated using optical microscopy and SEM. In particular, the accumulation of a completely de-vulcanized, liquid-like substance was observed under intense, multi-cycle impacts. All the findings discovered in quasi-impact experiments are consistent with the damage model predictions.
Committee
Arkady Leonov, Dr. (Advisor)
Pages
193 p.
Subject Headings
Polymers
Keywords
rubber
;
damage
;
impact
;
fatigue
;
constitutive modeling
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Citations
Melnikov, A. (2010).
Damage and Fatigue in Cross-Linked Rubbers
[Doctoral dissertation, University of Akron]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=akron1280198428
APA Style (7th edition)
Melnikov, Alexei.
Damage and Fatigue in Cross-Linked Rubbers.
2010. University of Akron, Doctoral dissertation.
OhioLINK Electronic Theses and Dissertations Center
, http://rave.ohiolink.edu/etdc/view?acc_num=akron1280198428.
MLA Style (8th edition)
Melnikov, Alexei. "Damage and Fatigue in Cross-Linked Rubbers." Doctoral dissertation, University of Akron, 2010. http://rave.ohiolink.edu/etdc/view?acc_num=akron1280198428
Chicago Manual of Style (17th edition)
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Document number:
akron1280198428
Download Count:
1,046
Copyright Info
© 2010, all rights reserved.
This open access ETD is published by University of Akron and OhioLINK.