Influence of strain rate on crushing behaviour of thin-walled members

• Autorzy: Kotełko M.
• Języki publikacji: EN

Abstrakty

EN

Results of the analysis into an influence of the strain rate upon crushing behaviour of thin-walled beams and columns are presented. The problem is solved using Finite Element Method and an analytical method based on the plastic mechanism approach. Subjects of analysis are top hat section columns under uniform axial compression and box-section beam under pure bending. The FE analysis taking into account the strain rate effect is performed, simultaneously with the plastic mechanism analysis (yield line analysis) in order to investigate the crushing behaviour of the member. The Cowper-Symonds constitutive relation is taken into consideration. The strain - hardening effect is neglected, so that in the analytical plastic mechanism solution the rigid - perfectly plastic material is taken into consideration, while FE analysis takes the strain hardening into account. Comparative diagrams of structural behaviour (loading paths) of thin-walled sections under investigation for different strain rates are presented. Some conclusions and remarks concerning the strain rate influence are derived.

Słowa kluczowe

EN

thin-walled members; dynamic crushing; strain rate sensitivity; plastic mechanism

PL

człony cienkościenne; zgniatanie dynamiczne; wskaźnik czułości naprężenia; mechanizm plastikowy

• Wydawca: Wydawnictwo Politechniki Łódzkiej
• Czasopismo: Mechanics and Mechanical Engineering
• Rocznik: 2010
• Tom: Vol. 14, nr 2
• Strony: 257--268
• Opis fizyczny: Bibliogr. 21 poz.

Twórcy

autor

Kotełko M.

• Department of Strength of Materials, Technical University of Łódź, 90-924 Łódź, Stefanowskiego 1/15, Poland

Bibliografia

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