IMPLEMENTATION OF EXPONENTIAL FUNCTION FOR ISOTROPIC HARDENING OF METALLIC FOAMS

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Surmiri Azam; HASANPOUR KOUROSH

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Seminar Paper

Paper Information

Seminar: CONFERENCE OF IRANIAN AEROSPACE SOCIETY
Year:2015 | Issue:14

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Title

IMPLEMENTATION OF EXPONENTIAL FUNCTION FOR ISOTROPIC HARDENING OF METALLIC FOAMS

Author(s)

Surmiri Azam | HASANPOUR KOUROSH

Keywords

ALUMINUM FOAM

ISOTROPIC HARDENING

RETURN MAPPING ALGORITHM

GENETIC ALGORITHM

Abstract

THE METALLIC FOAMS HAVE FOUND WIDE APPLICATIONS IN INDUSTRY DUE TO THEIR USEFUL PROPERTIES SUCH AS LOW DENSITY, HIGH HARDNESS, THERMAL AND ACOUSTIC INSULATION AND HIGH PERMEABILITY TO GAS. THESE MATERIALS ARE USED FOR THE PRODUCTION OF LIGHT WEIGHT STRUCTURES BECAUSE OF THE LOW DENSITY. DUE TO THEIR HIGH ENERGY ABSORPTION PROPERTIES OF POROUS MATERIALS IN COMPRESSION STRESS, METALIC FOAMS CAN BE SUBSTITUTE WITH PREVIOUS STRUCTURE HAVE BEEN USED BEFORE. THE MAJOR APPLICATIONS OF POROUS MATERIALS ARE IN AEROSPACE AND AUTOMOTIVE INDUSTRIES. FOAMS ARE WIDELY USED IN INDUSTRY SO PREDICTION OF THEIR BEHAVIOUR IS VERY IMPORTANT. IN RECENT YEARS, EXTENSIVE RESEARCHES HAVE BEEN DONE ON THE BEHAVIOUR OF THESE MATERIALS AND SO FAR SEVERAL CONSTITUTIVE EQUATIONS ARE PRESENTED FOR FOAMS. THERE ARE TWO TYPES OF WORK HARDENING: ISOTROPIC HARDENING AND KINEMATIC HARDENING. A NEW CONSTITUTIVE EQUATION FOR ISOTROPIC HARDENING FOAM IS PROVIDED IN THIS STUDY WHICH INCLUDES 3 PARAMETERS.THESE EQUATIONS ARE INTEGRATED USING RETURN MAPPING ALGORITHM AND DEVELOPED IN MATLAB. THEN COEFFICIENTS OF THIS EQUATION ARE OPTIMIZED USING GENETIC ALGORITHM AND THE EXPERIMENTAL AND NUMERICAL RESULTS HAVE BEEN COMPARED. FOUR TYPES OF ALUMINUM FOAMS HAVE BEEN STUDIED IN THIS INVESTIGATION INCLUDING ALPORAS, FOAMINAL, ALULIGHT AND CYMAT THAT ARE COMMERCIALLY AVAILABLE. COMPARISON BETWEEN NUMERICAL RESULTS AND EXPERIMENTAL DATA SHOWS THAT THIS NEW EQUATION IS ABLE TO PREDICT THE BEHAVIOUR OF FOAMS WITH ACCEPTABLE ACCURACY AND THERE IS GOOD AGREEMENT BETWEEN NUMERICAL AND EXPERIMENTAL CURVES.

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APA: Copy

Surmiri, Azam, & HASANPOUR, KOUROSH. (2015). IMPLEMENTATION OF EXPONENTIAL FUNCTION FOR ISOTROPIC HARDENING OF METALLIC FOAMS. CONFERENCE OF IRANIAN AEROSPACE SOCIETY. SID. https://sid.ir/paper/945681/en

Vancouver: Copy

Surmiri Azam, HASANPOUR KOUROSH. IMPLEMENTATION OF EXPONENTIAL FUNCTION FOR ISOTROPIC HARDENING OF METALLIC FOAMS. 2015. Available from: https://sid.ir/paper/945681/en

IEEE: Copy

Azam Surmiri, and KOUROSH HASANPOUR, “IMPLEMENTATION OF EXPONENTIAL FUNCTION FOR ISOTROPIC HARDENING OF METALLIC FOAMS,” presented at the CONFERENCE OF IRANIAN AEROSPACE SOCIETY. 2015, [Online]. Available: https://sid.ir/paper/945681/en

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