Residual strength of additive manufactured ABS parts subjected to fatigue loading. (May 2020)

• Record Type: Journal Article
• Authors: Ziemian, C.W.; Ziemian, R.D.
• Is Part Of: International journal of fatigue. Volume 134(2020)
• Publication Date: 2020-05
• Subjects: Additive manufacturing -- FDM fatigue response -- Cyclical strength degradation; Materials -- Fatigue -- Periodicals; Materials -- Fatigue; Periodicals; 620.1122
• DOI: 10.1016/j.ijfatigue.2019.105455
• Languages: English
• ISSNs: 0142-1123

Abstract

Graphical abstract: Highlights: Fiber orientation and layering pattern affect strength degradation of fatigue loaded FDM parts. Rate of normalized strength degradation is higher for 0° parts than bidirectional mesostructures. Normalized residual strengths of bidirectional parts are greater than that of 0° parts. A nonlinear phenomenological model predicts residual strength for the studied factor levels. Abstract: This study investigates the effect of tension fatigue loading on the residual strength degradation of additive manufactured ABS components formed by fused deposition modeling. Sinusoidal tension-tension fatigue loading with nine treatment combinations of cycling stress and duration were followed by tensile tests for 0°, +45/−45°, and +30/−60° mesostructures. Normalized residual strengths of the bidirectional mesostructures were significantly higher than that of the 0° parts for all factor combinations studied. A proposed phenomenological model, based on a strength degradation model for carbon fiber-reinforced composites, successfully described 92–96% of residual strength variability for the 0° specimens, and 77–92% for the bidirectional mesostructures tested.