فرزانه شريعتمدارتهراني

Additive manufacturing methods are considered as modern techniques for fabricating components. Unlike conventional manufacturing methods, in which the final part is produced by subtracting material from an initial block, additive manufacturing builds components layer by layer, even with complex geometries. In recent years, additive manufacturing has attracted significant attention in various industries, an‎d components of different sizes an‎d materials have been produced using these techniques. Since layer orientation in such components can be in different directions, the anisotropic characteristic of these components makes fracture analysis more challenging compared to isotropic materials. Numerous studies have recently been investigating fracture behavior of such components through various approaches. Among these, the phase-field method has proven highly effective for fracture analysis, as it not only provides accurate predictions of fracture loads but also predicts the crack propagation paths. In this study, the mechanical an‎d fracture properties of components fabricated by the use of Fused Deposition Modeling (FDM) process with different layer orientations an‎d pre-crack angles were investigated. To analyze fracture behavior of Acrylonitrile Butadiene Styrene (ABS) cracked components, four pre-crack angles of 0°, 15°, 30°, an‎d 40° were considered, each combined with four layer orientations of 0°, +45°, −45°, an‎d 90° relative to the pre-crack, to simulate fracture modes I, II, an‎d mixed-mode I/II loading conditions. Additionally, several cracked specimens made of other materials with different pre-crack angles, layer orientations, an‎d manufacturing methods were also examined for more comprehensive analysis. The fracture load of all laboratory cracked components was experimentally measured using three-point bending tests. Subsequently, fracture loads of the fabricated specimens an‎d those reported in the related literature were investigated by applying the phase-field method with Abaqus software through a user-defined subroutine incorporating an anisotropic damage model, an‎d the results were compared with experimental findings.

ساخت افزايشي , ميدان فازي , مكانيك شكست , آباكوس , سابروتين , بارگذاري مود I , بارگذاري مود مركب , بارگذاري مود II , لايه گذاري

Additive Manufacturing , Phase-Field , Fracture Mechanics , Abaqus , Subroutine , Mode I Loading , Mixed-Mode Loading , Mode II Loading , Layer Orientation

Farzaneh Shariatmadar Tehrani

Prof. Dr. M.R. Ayatollahi