Representing structures under impact load using scaled models: structure and model made of different materials

• Grant number: 14/03135-7
• Support Opportunities: Scholarships in Brazil - Doctorate
• Start date: May 01, 2014
• End date: April 30, 2016
• Field of knowledge: Engineering - Mechanical Engineering - Mechanics of Solids
• Principal Investigator: Marcílio Alves
• Grantee: Leonardo Monteiro Mazzariol
• Host Institution: Escola Politécnica (EP). Universidade de São Paulo (USP). São Paulo , SP, Brazil

Abstract

The art of engineering resides in create models, i.e., simplified abstractions of reality that are capable of representing a desired behaviour. Those models might be analytical abstractions, theoretical models, material behaviour and, analogically, the use of similar structures to infer the behaviour of others. Fluid mechanics has many applications to scaled models, while its application in solid mechanics lacks sufficient theoretical basis, particularly, in structural impact. Concerning the aforementioned, this project aims to develop distorted similarity laws for structural impact. This development will rely on theoretical, numerical and experimental studies of the impact of an indenter on basic structures, e.g. beams, plates and shells. The analytical model will describe in a simplified manner the behaviour of these prototype structures (full scale) made of materials that are different from those used to build the models. Numerical simulations will reproduce the experimental tests performed on prototypes and their representations using reduced scale models. The differences in the mechanical properties in those materials used to build model and prototype will be taken into account in the scaling procedure, which will require an extensive static and dynamic material characterization. Strain-rate effects will also be considered. Thus, we intend to develop a procedure to infer the behaviour of structures in real size under impact loading, using scaled models built with materials that differ from the prototype. These differences cover the following properties: density, yield stress, strain hardening and viscoplasticity.

Scientific publications

(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)

MAZZARIOL, LEONARDO M.; ALVES, MARCILIO. Experimental verification of similarity laws for impacted structures made of different materials. INTERNATIONAL JOURNAL OF IMPACT ENGINEERING, v. 133, NOV 2019. (14/03135-7)

MAZZARIOL, LEONARDO M.; ALVES, MARCILIO. Similarity laws of structures under impact load: Geometric and material distortion. INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES, v. 157, p. 633-647, JUL 2019. (14/03135-7)

MAZZARIOL, L. M.; OSHIRO, R. E.; ALVES, M.. A method to represent impacted structures using scaled models made of different materials. INTERNATIONAL JOURNAL OF IMPACT ENGINEERING, v. 90, p. 81-94, APR 2016. (14/03135-7)

Academic Publications

(References retrieved automatically from State of São Paulo Research Institutions)

MAZZARIOL, Leonardo Monteiro. Representing structures subjected to impact loads with scaled models: structure and model made of different materials.. 2017. Doctoral Thesis - Universidade de São Paulo (USP). Escola Politécnica (EP/BC) São Paulo.