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Structural Optimization and Material Fitting of a Material with Inherent Bistable Elements

Citace:
DIMITROVOVÁ, Z., HECZKO, J., LOBOVSKÝ, L., KRYSTEK, J., RODRIGUES, H.C. Structural Optimization and Material Fitting of a Material with Inherent Bistable Elements. In EngOpt 2016 - 5th International Conference on Engineering Optimization. Rio de Janeiro: E-papers Serviços Editoriais Ltda, 2016. s. 1-9. ISBN: 978-85-7650-522-8
Druh: STAŤ VE SBORNÍKU
Jazyk publikace: eng
Anglický název: Structural Optimization and Material Fitting of a Material with Inherent Bistable Elements
Rok vydání: 2016
Místo konání: Rio de Janeiro
Název zdroje: E-papers Serviços Editoriais Ltda
Autoři: Zuzana Dimitrovová , Ing. Jan Heczko , Ing. Libor Lobovský Ph.D. , Ing. Jan Krystek Ph.D. , Helder C. Rodrigues
Abstrakt EN: This paper is focused on material realization and numerical assessment of a negative stiffness phase. The new idea is formulated as to build such a phase by polyethylene foam of low density with special cuts to create a Structure with inherent, periodically distributed, bistable elements (SIBE). SIBE results under displacement control tests verified that the attained global loss factor is much higher than the one of the base material (BM). Therefore it is expected that significant improvements could be obtained if sizes, shapes and arrangements of the additional cuts would be subjected to techniques of structural and design optimization. With this objective convenient material model is defined, its parameters are fitted and optimized according to experiments and finite element model capable of reproducing experimental tests is developed.
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