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Start Over Coverage 197-207

1. Construction of $po$-groups with quasi-divisors theory

Creator:
Močkoř, Jiří
Format:
bez média and svazek
Type:
model:article and TEXT
Subject:
math, quasi-divisor theory, and divisor class group
Language:
English
Description:
A method is presented making it possible to construct $po$-groups with a strong theory of quasi-divisors of finite character and with some prescribed properties as subgroups of restricted Hahn groups $H(\Delta ,\mathbb{Z})$, where $\Delta $ are finitely atomic root systems. Some examples of these constructions are presented.
Rights:
http://creativecommons.org/publicdomain/mark/1.0/ and policy:public

3. New test approach and evaluation of dynamic and thermal parameters of elastomers

Creator:
Pešek, Luděk, Vaněk, František, Procházka, Pavel, Bula, Vítězslav, and Cibulka, Jan
Format:
bez média and svazek
Type:
model:article and TEXT
Subject:
rubber, dynamic, tests, identification, fatigue, and thermo-mechanics
Language:
English
Description:
The new test approach for evaluation of thermo-visco-elastic parameters of elastomers is designed, realized and discussed herein. The main attention is devoted to a kinematically excited rubber beam specimen under transient resonant sweep excitation. Mechanical material characteristics, i.e. Young modulus and loss angle, are identified from analytical formulas of frequency function based on measured dynamic loading and response signals. Heat material constants were estimated indirectly by numerical thermo-mechanical FE model and matching numerical and experimental results. The 'sweep' regime tests serve for estimation of thermal and mechanical dependences. Long-term fatigue tests with cyclic resonant loading enable analysis of material degradation, such as hardening and permanent deformations. and Obsahuje seznam literatury
Rights:
http://creativecommons.org/licenses/by-nc-sa/4.0/ and policy:public