Propagation of compaction waves in functionally graded cellular materials subjected to impact loading

• Grant number: 13/10884-3
• Support Opportunities: Research Grants - Visiting Researcher Grant - International
• Duration: October 13, 2013 - April 12, 2014
• Field of knowledge: Engineering - Mechanical Engineering - Mechanics of Solids
• Principal Investigator: Marcílio Alves
• Grantee: Marcílio Alves
• Visiting researcher: Dora Karagiozova
• Visiting researcher institution: Bulgarian Academy of Sciences (BAS), Bulgaria
• Host Institution: Escola Politécnica (EP). Universidade de São Paulo (USP). São Paulo , SP, Brazil

Abstract

The purpose of the proposed project is to carry on a theoretical analysis on the propagation of compaction waves in cellular materials graded by their density. Analytical models will be developed in order to deepen understanding of the dynamic compaction of foam and other cellular materials under intensive dynamic loads. In contrast to the commonly used concept of a predefined densification strain, the latter will be sought as a function of the impact velocity and type of loading. Different loading conditions will be analyzed: an impact of a cellular block by a rigid mass, impact of a cellular block on a rigid wall and impact of two cellular blocks having different density distributions. FE models will be constructed to verify the predictions of the theoretical models. Particular attention will be paid to the energy absorption capacity of the material depending on the gradient function and load intensity. (AU)

Scientific publications

(4)

(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)

KARAGIOZOVA, D.; ALVES, M.. Propagation of compaction waves in cellular materials with continuously varying density. INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES, v. 71, p. 323-337, OCT 1 2015. (13/10884-3)

KARAGIOZOVA, D.; ALVES, M.. Primary and Reflected Compaction Waves in a Foam Rod Due to an Axial Impact by a Small Mass. Latin American Journal of Solids and Structures, v. 12, n. 5, p. 905-924, 2015. (13/10884-3)

KARAGIOZOVA, D.; ALVES, M.. Compaction of a double-layered metal foam block impacting a rigid wall. INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES, v. 51, n. 13, p. 2424-2438, JUN 15 2014. (13/10884-3)

KARAGIOZOVA, D.; ALVES, M.. Stress waves in layered cellular materials-Dynamic compaction under axial impact. INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES, v. 101, p. 196-213, OCT 2015. (13/10884-3)