امين قنبري شتردار

Based on increasing development of additive manufacturing method in different industrial and research areas, designers should be confident about their performance under applied loads. The mechanical behavior of 3D printed specimens is anisotropic and the connection zones between filaments and layers have different mechanical strengths than filaments. One of the most important reasons for rapid development of 3D printing and also one of its important advantages is the ability to manufacture complex structures in just one step without any need to after production steps. This feature causes appearing stress concentrations and mainly notches in the structure of produced specimens and for this reason the mechanical performance of the specimen degrades. In this research, mode I fracture behavior of specimens produced by Fused Deposition Modeling (FDM) method containing blunt V notches and from ABS have been eva‎luated. For this purpose, two groups of rectangular and DLSP specimens containing double edge blunt V notches with five different raster angles and three different notch tip radii have been produced and tested. In order to predict the fracture behavior of these specimens and avoid complicated analysis of anisotropic behavior of the 3D printed structures, the Virtual Isotropic Material Concept (VIMC) has been used in conjunction with well-known criteria of Linear Elastic Notch Fracture mechanics (LENFM) including Point Stress (PS), Mean Stress (MS), Averaged Strain Energy Density (ASED) and Extended Finite Element Method (XFEM). Comparing the results predicted by the aforementioned methods with experimental date shows that all of these methods have the ability to predict the behavior of 3D printed structures containing blunt V notches. Keywords: additive manufacturing, blunt V notch, Acrylonitrile Butadiene Styrene (ABS), Virtual Isotropic Material (VIMC) concept, Linear Elastic Notch Fracture Mechanics (LENFM).

ساخت افزايشي , شيار V شكل با نوك گرد , اكريلونيتريل بوتادين استرين (ABS) , مفهوم ماده‌ي ايزوتروپيك (همسانگرد) مجازي (VIMC) , مكانيك شكست الاستيك خطي شيار

additive manufacturing , blunt V notch , Acrylonitrile Butadiene Styrene (ABS) , Virtual Isotropic Material (VIMC) concept , Linear Elastic Notch Fracture Mechanics (LENFM)

Amin Ghanbarishotordar

Dr. Majid Reza Ayatollahi