TY  - CONF
AU  - Milovanović, Aleksa
AU  - Poduška, Jan
AU  - Trávníček, Lukáš
AU  - Náhlík, Luboš
AU  - Sedmak, Aleksandar
AU  - Milošević, Miloš
AU  - Berto, Filippo
PY  - 2022
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/7196
AB  - PLA polymer is probably the most used thermoplastic material in FDM technology nowadays. Besides prototyping purposes, FDM materials are also considered for functional application use, thanks to the fast fabrication of components, relatively simple workflow, and the absence of material waste that this technology offers. Except for static material properties, data concerning the expected lifetime and reliability of AM parts under cyclic loading are also necessary for functional purposes. Due to the exceptional structural complexity of FDM parts, minor modifications in material testing must be used sometimes. The subject of this paper is the fracture mechanics-based fatigue testing of CT specimens that results in crack kinetics description like the Paris' law. One of the objectives is also to describe the effect of SGs placed on the surface of CT specimens, and the effect of different layer heights. The main intention of the SGs is to secure a straight crack propagation path, thus imposing the crack to follow the Mode I condition, predominantly. A set of regular CT specimens and specimens with SGs was prepared with a full infill density interior and with different layer heights (0.1 mm and 0.3 mm). Crack kinetics measured on these specimens are presented in this paper and discussed.
PB  - Elsevier BV
C3  - Procedia Structural Integrity
T1  - Side-groove effect on fracture mechanical fatigue testing of PLA material
EP  - 856
SP  - 847
VL  - 42
DO  - 10.1016/j.prostr.2022.12.107
ER  - 

@conference{
author = "Milovanović, Aleksa and Poduška, Jan and Trávníček, Lukáš and Náhlík, Luboš and Sedmak, Aleksandar and Milošević, Miloš and Berto, Filippo",
year = "2022",
abstract = "PLA polymer is probably the most used thermoplastic material in FDM technology nowadays. Besides prototyping purposes, FDM materials are also considered for functional application use, thanks to the fast fabrication of components, relatively simple workflow, and the absence of material waste that this technology offers. Except for static material properties, data concerning the expected lifetime and reliability of AM parts under cyclic loading are also necessary for functional purposes. Due to the exceptional structural complexity of FDM parts, minor modifications in material testing must be used sometimes. The subject of this paper is the fracture mechanics-based fatigue testing of CT specimens that results in crack kinetics description like the Paris' law. One of the objectives is also to describe the effect of SGs placed on the surface of CT specimens, and the effect of different layer heights. The main intention of the SGs is to secure a straight crack propagation path, thus imposing the crack to follow the Mode I condition, predominantly. A set of regular CT specimens and specimens with SGs was prepared with a full infill density interior and with different layer heights (0.1 mm and 0.3 mm). Crack kinetics measured on these specimens are presented in this paper and discussed.",
publisher = "Elsevier BV",
journal = "Procedia Structural Integrity",
title = "Side-groove effect on fracture mechanical fatigue testing of PLA material",
pages = "856-847",
volume = "42",
doi = "10.1016/j.prostr.2022.12.107"
}

Milovanović, A., Poduška, J., Trávníček, L., Náhlík, L., Sedmak, A., Milošević, M.,& Berto, F.. (2022). Side-groove effect on fracture mechanical fatigue testing of PLA material. in Procedia Structural Integrity
Elsevier BV., 42, 847-856.
https://doi.org/10.1016/j.prostr.2022.12.107

Milovanović A, Poduška J, Trávníček L, Náhlík L, Sedmak A, Milošević M, Berto F. Side-groove effect on fracture mechanical fatigue testing of PLA material. in Procedia Structural Integrity. 2022;42:847-856.
doi:10.1016/j.prostr.2022.12.107 .

Milovanović, Aleksa, Poduška, Jan, Trávníček, Lukáš, Náhlík, Luboš, Sedmak, Aleksandar, Milošević, Miloš, Berto, Filippo, "Side-groove effect on fracture mechanical fatigue testing of PLA material" in Procedia Structural Integrity, 42 (2022):847-856,
https://doi.org/10.1016/j.prostr.2022.12.107 . .

TY  - CONF
AU  - Milovanović, Aleksa
AU  - Milošević, Miloš
AU  - Trajković, Isaak
AU  - Sedmak, Aleksandar
AU  - Razavi, Mohammad Javad
AU  - Berto, Filippo
PY  - 2022
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/7197
AB  - Plane-strain fracture toughness is one of the main parameters in linear elastic fracture mechanics and its purpose is to show the material capability to withstand load while having a defect. Main validity aspect for such an assessment is to provide a wide enough crack front to enable plane-strain condition. Nonetheless, in FDM (Fused Deposition Modeling), due to structural anisotropy caused by polymer material properties and Additive Manufacturing (AM) process parameters, more validity aspects must be met. During the plane-strain fracture toughness test a crack must follow a straight line from initiation up to the point of structural failure. Plane-strain fracture toughness assessment is conducted according to the ASTM D5045-14 standard for testing of polymer materials. Tests are performed on SENB (Single Edge Notched Bend) specimens, made from two similar polymer materials: quasi-brittle PLA and ductile PLA-X composite. Specimens are manufactured with four different AM process parameters, i.e., layer height, infill density, printing orientation and one specimen batch was dried before testing.
PB  - Elsevier BV
C3  - Procedia Structural Integrity
T1  - Crack path direction in plane-strain fracture toughness assessment tests of quasi-brittle PLA polymer and ductile PLA-X composite
EP  - 1381
SP  - 1376
VL  - 42
DO  - 10.1016/j.prostr.2022.12.175
ER  - 

@conference{
author = "Milovanović, Aleksa and Milošević, Miloš and Trajković, Isaak and Sedmak, Aleksandar and Razavi, Mohammad Javad and Berto, Filippo",
year = "2022",
abstract = "Plane-strain fracture toughness is one of the main parameters in linear elastic fracture mechanics and its purpose is to show the material capability to withstand load while having a defect. Main validity aspect for such an assessment is to provide a wide enough crack front to enable plane-strain condition. Nonetheless, in FDM (Fused Deposition Modeling), due to structural anisotropy caused by polymer material properties and Additive Manufacturing (AM) process parameters, more validity aspects must be met. During the plane-strain fracture toughness test a crack must follow a straight line from initiation up to the point of structural failure. Plane-strain fracture toughness assessment is conducted according to the ASTM D5045-14 standard for testing of polymer materials. Tests are performed on SENB (Single Edge Notched Bend) specimens, made from two similar polymer materials: quasi-brittle PLA and ductile PLA-X composite. Specimens are manufactured with four different AM process parameters, i.e., layer height, infill density, printing orientation and one specimen batch was dried before testing.",
publisher = "Elsevier BV",
journal = "Procedia Structural Integrity",
title = "Crack path direction in plane-strain fracture toughness assessment tests of quasi-brittle PLA polymer and ductile PLA-X composite",
pages = "1381-1376",
volume = "42",
doi = "10.1016/j.prostr.2022.12.175"
}

Milovanović, A., Milošević, M., Trajković, I., Sedmak, A., Razavi, M. J.,& Berto, F.. (2022). Crack path direction in plane-strain fracture toughness assessment tests of quasi-brittle PLA polymer and ductile PLA-X composite. in Procedia Structural Integrity
Elsevier BV., 42, 1376-1381.
https://doi.org/10.1016/j.prostr.2022.12.175

Milovanović A, Milošević M, Trajković I, Sedmak A, Razavi MJ, Berto F. Crack path direction in plane-strain fracture toughness assessment tests of quasi-brittle PLA polymer and ductile PLA-X composite. in Procedia Structural Integrity. 2022;42:1376-1381.
doi:10.1016/j.prostr.2022.12.175 .

Milovanović, Aleksa, Milošević, Miloš, Trajković, Isaak, Sedmak, Aleksandar, Razavi, Mohammad Javad, Berto, Filippo, "Crack path direction in plane-strain fracture toughness assessment tests of quasi-brittle PLA polymer and ductile PLA-X composite" in Procedia Structural Integrity, 42 (2022):1376-1381,
https://doi.org/10.1016/j.prostr.2022.12.175 . .