Similarity laws of structures under impact load: Geometric and material distortion

Autor(es)

Mazzariol, Leonardo M. ^{[1, 2]} ; Alves, Marcilio ^[1]

Afiliação do(s) autor(es)

^[1] Univ Sao Paulo, Dept Mechatron & Mech Syst Engn, Grp Solid Mech & Struct Impact, BR-05508900 Sao Paulo - Brazil

^[2] Fed Univ ABC, Engn Modeling & Appl Social Sci Ctr CECS, BR-09210580 Santo Andre, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES; v. 157, p. 633-647, JUL 2019.
• Citações Web of Science: 2

Resumo

Recent developments of similarity laws in structural impact have focused on methods of altering the impact velocity to overcome strain-rate effects and differences in material mechanical properties. The present study shows a more comprehensive framework where density, material properties and small thickness distortion are all taken into account when relating scaled models to prototypes under impact loads. The procedure is applied to using theoretical solutions of impact loaded structures such as beams, circular plates and a double plate structure. In addition, numerical simulation is performed to assess the behaviour of a double plate structure, circular plates under impact and impulsive loading. Results have shown that differences in density, strength properties as well as thickness distortions can all be compensated by respecting dimensionless number based on plastic bending moment M-0 and mass ratio. This allows one to predict the response of a large structure by testing a small scale model, even when they are made of different materials. (AU)

• Processo FAPESP: 14/03135-7 - Representação de estruturas sujeitas a cargas de impacto através de modelos escalonados: estrutura e modelo feitos de materiais diferentes
• Beneficiário: Leonardo Monteiro Mazzariol
• Modalidade de apoio: Bolsas no Brasil - Doutorado