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Fatigue and damage accumulation in open cell aluminium foams
Author(s) -
Pinto H.,
Amini A.,
Peña Á.,
Moraga P.,
Valenzuela M.
Publication year - 2018
Publication title -
fatigue and fracture of engineering materials and structures
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.887
H-Index - 84
eISSN - 1460-2695
pISSN - 8756-758X
DOI - 10.1111/ffe.12716
Subject(s) - weibull distribution , materials science , ultimate tensile strength , aluminium , exponential function , metal foam , composite material , stress (linguistics) , structural engineering , quadratic equation , reduction (mathematics) , quadratic function , stress space , compressive strength , finite element method , constitutive equation , mathematics , mathematical analysis , engineering , linguistics , statistics , philosophy , geometry
Open‐cell aluminium foams are a relatively new material with interesting uses in different engineering applications. This study investigates the fatigue behaviour and damage accumulation of metal foams via a fatigue analysis (Weibull E‐N model), a failure criterion (the relation among the prepeak compressive and tensile slopes, the reduction in the tensile stress, or the reduction in the compressive stress), and a mathematical approach (linear, quadratic, or exponential). As a result of combining the 3 mathematical approaches and 3 failure criteria, different approaches are obtained, analysed, and validated by using experimental data. Finally, the proposed approaches can be used to directly obtain the damage accumulation level for open‐cell metal foams under fully reversed cyclic loading as a function of the number of cycles applied, the total strain amplitude, and the initial damage accumulation condition.