TY  - JOUR
AU  - Milovanović, Aleksa
AU  - Montanari, Matteo
AU  - Golubović, Zorana
AU  - Marghitas, Mihai
AU  - Spagnoli, Andrea
AU  - Brighenti, Roberto
AU  - Sedmak, Aleksandar
PY  - 2024
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/7785
AB  - In recent years, Additive Manufacturing (AM) has become an increasingly popular method in industrial
applications for fabricating components with complex geometries, offering several benefits over traditional
(subtractive) manufacturing methods. Among all available AM technologies, ‘‘vat photopolymerization’’ is still
a reliable approach for manufacturing high-resolution components at relatively small costs. This particular
AM technology is based on the photopolymerization process where 3D objects are created by light-induced
solidification and it has been broadly developed and used in the past decades. Depending on the employed
light source there are three different subtypes of this technology, namely: SLA, DLP, and mSLA. Among all
three listed, the Masked Stereolithography Apparatus (mSLA) technology has emerged as a promising approach
due to the much simpler AM machine construction compared to the other two. However, the mechanical
properties of mSLA components have not been studied extensively, hence there is a lack of knowledge of
how AM process parameters and post-processing treatments affect the final mechanical properties of mSLA
components. This work presents an experimental investigation of the compressive and flexural mechanical
responses of components produced through this relatively new AM technology. A series of static and cyclic
tests were conducted with varying layer thickness and post-curing times. It is demonstrated that a thorough
optimization of the mentioned variables is required to obtain parts with the desired mechanical properties.
PB  - Elsevier
T2  - Theoretical and Applied Fracture Mechanics
T1  - Compressive and flexural mechanical responses of components obtained through mSLA vat photopolymerization technology
IS  - 104406
VL  - 131
DO  - 10.1016/j.tafmec.2024.104406
ER  - 

@article{
author = "Milovanović, Aleksa and Montanari, Matteo and Golubović, Zorana and Marghitas, Mihai and Spagnoli, Andrea and Brighenti, Roberto and Sedmak, Aleksandar",
year = "2024",
abstract = "In recent years, Additive Manufacturing (AM) has become an increasingly popular method in industrial
applications for fabricating components with complex geometries, offering several benefits over traditional
(subtractive) manufacturing methods. Among all available AM technologies, ‘‘vat photopolymerization’’ is still
a reliable approach for manufacturing high-resolution components at relatively small costs. This particular
AM technology is based on the photopolymerization process where 3D objects are created by light-induced
solidification and it has been broadly developed and used in the past decades. Depending on the employed
light source there are three different subtypes of this technology, namely: SLA, DLP, and mSLA. Among all
three listed, the Masked Stereolithography Apparatus (mSLA) technology has emerged as a promising approach
due to the much simpler AM machine construction compared to the other two. However, the mechanical
properties of mSLA components have not been studied extensively, hence there is a lack of knowledge of
how AM process parameters and post-processing treatments affect the final mechanical properties of mSLA
components. This work presents an experimental investigation of the compressive and flexural mechanical
responses of components produced through this relatively new AM technology. A series of static and cyclic
tests were conducted with varying layer thickness and post-curing times. It is demonstrated that a thorough
optimization of the mentioned variables is required to obtain parts with the desired mechanical properties.",
publisher = "Elsevier",
journal = "Theoretical and Applied Fracture Mechanics",
title = "Compressive and flexural mechanical responses of components obtained through mSLA vat photopolymerization technology",
number = "104406",
volume = "131",
doi = "10.1016/j.tafmec.2024.104406"
}

Milovanović, A., Montanari, M., Golubović, Z., Marghitas, M., Spagnoli, A., Brighenti, R.,& Sedmak, A.. (2024). Compressive and flexural mechanical responses of components obtained through mSLA vat photopolymerization technology. in Theoretical and Applied Fracture Mechanics
Elsevier., 131(104406).
https://doi.org/10.1016/j.tafmec.2024.104406

Milovanović A, Montanari M, Golubović Z, Marghitas M, Spagnoli A, Brighenti R, Sedmak A. Compressive and flexural mechanical responses of components obtained through mSLA vat photopolymerization technology. in Theoretical and Applied Fracture Mechanics. 2024;131(104406).
doi:10.1016/j.tafmec.2024.104406 .

Milovanović, Aleksa, Montanari, Matteo, Golubović, Zorana, Marghitas, Mihai, Spagnoli, Andrea, Brighenti, Roberto, Sedmak, Aleksandar, "Compressive and flexural mechanical responses of components obtained through mSLA vat photopolymerization technology" in Theoretical and Applied Fracture Mechanics, 131, no. 104406 (2024),
https://doi.org/10.1016/j.tafmec.2024.104406 . .

TY  - CONF
AU  - Milovanović, Aleksa
AU  - Montanari, Matteo
AU  - Brighenti, Roberto
AU  - Sedmak, Aleksandar
AU  - Milošević, Miloš
PY  - 2023
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/7373
AB  - Vat photopolymerization is an Additive Manufacturing (AM) technology that enables the production of dimensionally accurate components. Due to its accuracy, this technology has led to the development of various sub-types, each with different methods of introducing UV light to the liquid resin in the vat. UV light can be introduced through a mirror system (SLA), a projector (DLP), or an LCD screen that acts as a photomask over a projector’s light, allowing for the curing of the entire layer in one pass (MSLA). The material of interest in this study is a standard translucent resin used in MSLA, with a UV light wavelength of 405 nm. Previous extensive mechanical characterization of this material has shown a high dependence on the final component properties on layer thickness and curing times.
The objective of this research is to analyse the time-dependent behaviour of these materials. Specifically, closed-loops compression tests have been conducted, subjecting the material to loading and unloading sequences at strain levels of 5 and 25 %. To clarify, a strain level of 5 % falls within the elastic region of the material, while a strain level of 25 % is considerably within the plastic region. Various testing speeds were applied, namely 1, 5, 10, 25, and 100 mm/min. The influence of testing speed on the materials’ energy absorption capacity is evident. The highest difference is observed between 10 and 25 mm/min, indicating that the material’s ability to store energy is significantly reduced after a testing speed of 10 mm/min.
C3  - International conference of experimental and numerical investigations and new technologies (2023 ; Zlatibor)
T1  - Time-dependent behaviour of photosensitive resins in mSLA technology
SP  - 80
UR  - https://hdl.handle.net/21.15107/rcub_machinery_7373
ER  - 

@conference{
author = "Milovanović, Aleksa and Montanari, Matteo and Brighenti, Roberto and Sedmak, Aleksandar and Milošević, Miloš",
year = "2023",
abstract = "Vat photopolymerization is an Additive Manufacturing (AM) technology that enables the production of dimensionally accurate components. Due to its accuracy, this technology has led to the development of various sub-types, each with different methods of introducing UV light to the liquid resin in the vat. UV light can be introduced through a mirror system (SLA), a projector (DLP), or an LCD screen that acts as a photomask over a projector’s light, allowing for the curing of the entire layer in one pass (MSLA). The material of interest in this study is a standard translucent resin used in MSLA, with a UV light wavelength of 405 nm. Previous extensive mechanical characterization of this material has shown a high dependence on the final component properties on layer thickness and curing times.
The objective of this research is to analyse the time-dependent behaviour of these materials. Specifically, closed-loops compression tests have been conducted, subjecting the material to loading and unloading sequences at strain levels of 5 and 25 %. To clarify, a strain level of 5 % falls within the elastic region of the material, while a strain level of 25 % is considerably within the plastic region. Various testing speeds were applied, namely 1, 5, 10, 25, and 100 mm/min. The influence of testing speed on the materials’ energy absorption capacity is evident. The highest difference is observed between 10 and 25 mm/min, indicating that the material’s ability to store energy is significantly reduced after a testing speed of 10 mm/min.",
journal = "International conference of experimental and numerical investigations and new technologies (2023 ; Zlatibor)",
title = "Time-dependent behaviour of photosensitive resins in mSLA technology",
pages = "80",
url = "https://hdl.handle.net/21.15107/rcub_machinery_7373"
}

Milovanović, A., Montanari, M., Brighenti, R., Sedmak, A.,& Milošević, M.. (2023). Time-dependent behaviour of photosensitive resins in mSLA technology. in International conference of experimental and numerical investigations and new technologies (2023 ; Zlatibor), 80.
https://hdl.handle.net/21.15107/rcub_machinery_7373

Milovanović A, Montanari M, Brighenti R, Sedmak A, Milošević M. Time-dependent behaviour of photosensitive resins in mSLA technology. in International conference of experimental and numerical investigations and new technologies (2023 ; Zlatibor). 2023;:80.
https://hdl.handle.net/21.15107/rcub_machinery_7373 .

Milovanović, Aleksa, Montanari, Matteo, Brighenti, Roberto, Sedmak, Aleksandar, Milošević, Miloš, "Time-dependent behaviour of photosensitive resins in mSLA technology" in International conference of experimental and numerical investigations and new technologies (2023 ; Zlatibor) (2023):80,
https://hdl.handle.net/21.15107/rcub_machinery_7373 .