New Additive Manufacturing (AM) technologies require a deep knowledge of the process parameters to assure proper mechanical performances of structural components. In addition, fatigue loads may lead to premature failures of AM components compared to their traditional-manufactured counterparts. It is of fundamental importance to adopt a time and material saving strategy to investigate the fatigue behaviour of such components. Considering that fatigue is an energy-dissipative process, monitoring the specimen temperature provide useful information regarding the damage evolution within the material. Recently, the Static Thermographic Method (STM) has been proposed as a rapid test procedure to assess the initiation of damage in the material monitoring the temperature evolution during static tensile tests. In this work, the energy release of plain PA12 specimens, obtained by Selective Laser Sintering process, has been assessed allowing the estimation of a macroscopic limit stress that causes in the material the first irreversible plastic deformation. (C) 2021 The Authors. Published by Elsevier B.V.
Fatigue damage assessment in AM polymers evaluating their energy release
Santonocito, D
Primo
;Risitano, G;
2021-01-01
Abstract
New Additive Manufacturing (AM) technologies require a deep knowledge of the process parameters to assure proper mechanical performances of structural components. In addition, fatigue loads may lead to premature failures of AM components compared to their traditional-manufactured counterparts. It is of fundamental importance to adopt a time and material saving strategy to investigate the fatigue behaviour of such components. Considering that fatigue is an energy-dissipative process, monitoring the specimen temperature provide useful information regarding the damage evolution within the material. Recently, the Static Thermographic Method (STM) has been proposed as a rapid test procedure to assess the initiation of damage in the material monitoring the temperature evolution during static tensile tests. In this work, the energy release of plain PA12 specimens, obtained by Selective Laser Sintering process, has been assessed allowing the estimation of a macroscopic limit stress that causes in the material the first irreversible plastic deformation. (C) 2021 The Authors. Published by Elsevier B.V.Pubblicazioni consigliate
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