TY  - CONF
AU  - Trajković, Isaak
AU  - Milošević, Miloš
AU  - Sedmak, Aleksandar
AU  - Rakin, Marko
AU  - Marsavina, Liviu
AU  - Medjo, Bojan
PY  - 2022
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/7280
AB  - How and in which field products made by additive technologies can be applied depends not only on the type
of material and manufacturing technique but also on the economic aspect. The most affordable materials and
techniques are often used for rapid product development. These products are very often a replacement or
temporary part in a machine assembly. The integrity of such an assembly due to the mechanical characteristics
of the materials used in additive manufacturing most often depends on the element made by additive
manufacturing. In order to understand the question of the integrity of the element itself and on that basis to
choose the technique and material for the production of elements, it was necessary to compare the parameters
of fracture mechanics for two types of materials. In this study, the results of fracture mechanical parameters
will be presented. Parameters of fracture mechanics was obtained by using the Aramis 2M system by the
method of digital image correlation (DIC) and a universal machine for testing the mechanical properties of
materials (Shimadzu AGS-X 100kN) on SENT (Single Edge Notched Tension) type specimens. One part of
the tested specimens was made of PLA (polylactic acid) material on a FDM (Fused Deposition Modeling) type
printer while the other part of the tested specimens was made of photopolymer resin (Photopolymer resin Gray,
FLGPGR04 by FormLabs) made by stereo lithography technique on an SLA (Stereolithography Apparatus)
printer. The examination confirmed the repeatability of the results and on the basis of them the parameters of
fracture mechanics for both types of specimens were determined.
PB  - Innovation Center of Faculty of Mechanical Engineering
C3  - CNN TECH 2022 „ International Conference of Experimental and Numerical Investigations and New Technologies “   Zlatibor, July 05 – July 08, 2022
T1  - COMPARISON OF FRACTURE MECHANICS PARAMETERS DURING TESTING OF SENT SPECIMENS MADE BY DIFFERENT ADDITIVE PRODUCTION TECHNIQUE
UR  - https://hdl.handle.net/21.15107/rcub_machinery_7280
ER  - 

@conference{
author = "Trajković, Isaak and Milošević, Miloš and Sedmak, Aleksandar and Rakin, Marko and Marsavina, Liviu and Medjo, Bojan",
year = "2022",
abstract = "How and in which field products made by additive technologies can be applied depends not only on the type
of material and manufacturing technique but also on the economic aspect. The most affordable materials and
techniques are often used for rapid product development. These products are very often a replacement or
temporary part in a machine assembly. The integrity of such an assembly due to the mechanical characteristics
of the materials used in additive manufacturing most often depends on the element made by additive
manufacturing. In order to understand the question of the integrity of the element itself and on that basis to
choose the technique and material for the production of elements, it was necessary to compare the parameters
of fracture mechanics for two types of materials. In this study, the results of fracture mechanical parameters
will be presented. Parameters of fracture mechanics was obtained by using the Aramis 2M system by the
method of digital image correlation (DIC) and a universal machine for testing the mechanical properties of
materials (Shimadzu AGS-X 100kN) on SENT (Single Edge Notched Tension) type specimens. One part of
the tested specimens was made of PLA (polylactic acid) material on a FDM (Fused Deposition Modeling) type
printer while the other part of the tested specimens was made of photopolymer resin (Photopolymer resin Gray,
FLGPGR04 by FormLabs) made by stereo lithography technique on an SLA (Stereolithography Apparatus)
printer. The examination confirmed the repeatability of the results and on the basis of them the parameters of
fracture mechanics for both types of specimens were determined.",
publisher = "Innovation Center of Faculty of Mechanical Engineering",
journal = "CNN TECH 2022 „ International Conference of Experimental and Numerical Investigations and New Technologies “   Zlatibor, July 05 – July 08, 2022",
title = "COMPARISON OF FRACTURE MECHANICS PARAMETERS DURING TESTING OF SENT SPECIMENS MADE BY DIFFERENT ADDITIVE PRODUCTION TECHNIQUE",
url = "https://hdl.handle.net/21.15107/rcub_machinery_7280"
}

Trajković, I., Milošević, M., Sedmak, A., Rakin, M., Marsavina, L.,& Medjo, B.. (2022). COMPARISON OF FRACTURE MECHANICS PARAMETERS DURING TESTING OF SENT SPECIMENS MADE BY DIFFERENT ADDITIVE PRODUCTION TECHNIQUE. in CNN TECH 2022 „ International Conference of Experimental and Numerical Investigations and New Technologies “   Zlatibor, July 05 – July 08, 2022
Innovation Center of Faculty of Mechanical Engineering..
https://hdl.handle.net/21.15107/rcub_machinery_7280

Trajković I, Milošević M, Sedmak A, Rakin M, Marsavina L, Medjo B. COMPARISON OF FRACTURE MECHANICS PARAMETERS DURING TESTING OF SENT SPECIMENS MADE BY DIFFERENT ADDITIVE PRODUCTION TECHNIQUE. in CNN TECH 2022 „ International Conference of Experimental and Numerical Investigations and New Technologies “   Zlatibor, July 05 – July 08, 2022. 2022;.
https://hdl.handle.net/21.15107/rcub_machinery_7280 .

Trajković, Isaak, Milošević, Miloš, Sedmak, Aleksandar, Rakin, Marko, Marsavina, Liviu, Medjo, Bojan, "COMPARISON OF FRACTURE MECHANICS PARAMETERS DURING TESTING OF SENT SPECIMENS MADE BY DIFFERENT ADDITIVE PRODUCTION TECHNIQUE" in CNN TECH 2022 „ International Conference of Experimental and Numerical Investigations and New Technologies “   Zlatibor, July 05 – July 08, 2022 (2022),
https://hdl.handle.net/21.15107/rcub_machinery_7280 .

TY  - CONF
AU  - Milošević, Miloš
AU  - Rakin, Marko
AU  - Berto, Filipo
AU  - Međo, Bojan
AU  - Trajković, Isaak
AU  - Bogojević, Nebojša
AU  - Ćirić-Kostić, Snežana
PY  - 2022
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/7274
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)
polymers, due to structural anisotropy caused by material properties and Additive
Manufacturing (AM) process parameters, more validity aspects must be met. During the planestrain fracture toughness test a crack must follow a straight line from initiation cite up to the
point of structural failure. For such a purpose a DIC (Digital Image Correlation) device can be
used for crack path direction analysis. 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 batch was dried before testing. Testing is conducted using 3-point bending test fixture on
universal testing machine, with DIC dual-camera device placed ahead of the machine in order
to capture full-field deformations of front SENB specimen surface (Fig. 1).
PB  - ESIS Publishing House (ESIS-PH) European Conference on Fracture
C3  - Procedia Structural Integrity
T1  - Additively manufactured tensile ring-shaped specimens for pipeline material fracture examination - influence of geometry
UR  - https://hdl.handle.net/21.15107/rcub_machinery_7274
ER  - 

@conference{
author = "Milošević, Miloš and Rakin, Marko and Berto, Filipo and Međo, Bojan and Trajković, Isaak and Bogojević, Nebojša and Ćirić-Kostić, Snežana",
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)
polymers, due to structural anisotropy caused by material properties and Additive
Manufacturing (AM) process parameters, more validity aspects must be met. During the planestrain fracture toughness test a crack must follow a straight line from initiation cite up to the
point of structural failure. For such a purpose a DIC (Digital Image Correlation) device can be
used for crack path direction analysis. 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 batch was dried before testing. Testing is conducted using 3-point bending test fixture on
universal testing machine, with DIC dual-camera device placed ahead of the machine in order
to capture full-field deformations of front SENB specimen surface (Fig. 1).",
publisher = "ESIS Publishing House (ESIS-PH) European Conference on Fracture",
journal = "Procedia Structural Integrity",
title = "Additively manufactured tensile ring-shaped specimens for pipeline material fracture examination - influence of geometry",
url = "https://hdl.handle.net/21.15107/rcub_machinery_7274"
}

Milošević, M., Rakin, M., Berto, F., Međo, B., Trajković, I., Bogojević, N.,& Ćirić-Kostić, S.. (2022). Additively manufactured tensile ring-shaped specimens for pipeline material fracture examination - influence of geometry. in Procedia Structural Integrity
ESIS Publishing House (ESIS-PH) European Conference on Fracture..
https://hdl.handle.net/21.15107/rcub_machinery_7274

Milošević M, Rakin M, Berto F, Međo B, Trajković I, Bogojević N, Ćirić-Kostić S. Additively manufactured tensile ring-shaped specimens for pipeline material fracture examination - influence of geometry. in Procedia Structural Integrity. 2022;.
https://hdl.handle.net/21.15107/rcub_machinery_7274 .

Milošević, Miloš, Rakin, Marko, Berto, Filipo, Međo, Bojan, Trajković, Isaak, Bogojević, Nebojša, Ćirić-Kostić, Snežana, "Additively manufactured tensile ring-shaped specimens for pipeline material fracture examination - influence of geometry" in Procedia Structural Integrity (2022),
https://hdl.handle.net/21.15107/rcub_machinery_7274 .

TY  - CONF
AU  - Trajković, Isaak
AU  - Milošević, Miloš
AU  - Travica, Milan
AU  - Rakin, Marko
AU  - Jevtić, Ivana
AU  - Sedmak, Aleksandar
AU  - Međo, Bojan
PY  - 2022
UR  - https://machinery.mas.bg.ac.rs/handle/123456789/5929
AB  - This work presents the difference in the values of fracture mechanics parameters obtained by
testing of cylindrical specimens with a sharp notch, cut on the tip of a wider groove. The
samples were obtained using two different additive manufacturing techniques. The first type
of samples was obtained by the FDM (Fused Deposition Modeling) method, on the German
REPRAP X400 device with an average accuracy of 0.25 mm. The second type of samples was
made using the SLS (Selective Laser Sintering) method on the EOS Formiga P100 device with
a production precision of 0.08 mm. Regardless of the difference in manufacturing techniques,
the direction and orientation of the samples was identical. The samples were prepared so that
during loading the fibers are loaded in tension, i.e. axially. Different lengths of the sharp
notches were fabricated axially on the samples. The values of fracture mechanics parameters
such as CMOD (Crack Mouth Opening Displacement) and CTOD-5 (Crack Tip Opening
Displacement obtained using the -5 technique) were obtained using the digital image
correlation method. The obtained parameters, except for mutual correlation, were also used
for the verification of numerical results. In the future work, a procedure for determination of
energy-based fracture mechanics parameters will be developed for this sample geometry.
PB  - Faculty of Mechanical Engineering, Univ. of Belgrade
C3  - 3rd International Workshop on Reliability and Design of Additively Manufactured Materials – RdAMM2 Belgrade, Serbia, 4th –6th October 2022
T1  - Determining fracture mechanics parameters using the digital image correlation method on cylindrical samples produced by different additive manufacturing techniques
UR  - https://hdl.handle.net/21.15107/rcub_machinery_5929
ER  - 

@conference{
author = "Trajković, Isaak and Milošević, Miloš and Travica, Milan and Rakin, Marko and Jevtić, Ivana and Sedmak, Aleksandar and Međo, Bojan",
year = "2022",
abstract = "This work presents the difference in the values of fracture mechanics parameters obtained by
testing of cylindrical specimens with a sharp notch, cut on the tip of a wider groove. The
samples were obtained using two different additive manufacturing techniques. The first type
of samples was obtained by the FDM (Fused Deposition Modeling) method, on the German
REPRAP X400 device with an average accuracy of 0.25 mm. The second type of samples was
made using the SLS (Selective Laser Sintering) method on the EOS Formiga P100 device with
a production precision of 0.08 mm. Regardless of the difference in manufacturing techniques,
the direction and orientation of the samples was identical. The samples were prepared so that
during loading the fibers are loaded in tension, i.e. axially. Different lengths of the sharp
notches were fabricated axially on the samples. The values of fracture mechanics parameters
such as CMOD (Crack Mouth Opening Displacement) and CTOD-5 (Crack Tip Opening
Displacement obtained using the -5 technique) were obtained using the digital image
correlation method. The obtained parameters, except for mutual correlation, were also used
for the verification of numerical results. In the future work, a procedure for determination of
energy-based fracture mechanics parameters will be developed for this sample geometry.",
publisher = "Faculty of Mechanical Engineering, Univ. of Belgrade",
journal = "3rd International Workshop on Reliability and Design of Additively Manufactured Materials – RdAMM2 Belgrade, Serbia, 4th –6th October 2022",
title = "Determining fracture mechanics parameters using the digital image correlation method on cylindrical samples produced by different additive manufacturing techniques",
url = "https://hdl.handle.net/21.15107/rcub_machinery_5929"
}

Trajković, I., Milošević, M., Travica, M., Rakin, M., Jevtić, I., Sedmak, A.,& Međo, B.. (2022). Determining fracture mechanics parameters using the digital image correlation method on cylindrical samples produced by different additive manufacturing techniques. in 3rd International Workshop on Reliability and Design of Additively Manufactured Materials – RdAMM2 Belgrade, Serbia, 4th –6th October 2022
Faculty of Mechanical Engineering, Univ. of Belgrade..
https://hdl.handle.net/21.15107/rcub_machinery_5929

Trajković I, Milošević M, Travica M, Rakin M, Jevtić I, Sedmak A, Međo B. Determining fracture mechanics parameters using the digital image correlation method on cylindrical samples produced by different additive manufacturing techniques. in 3rd International Workshop on Reliability and Design of Additively Manufactured Materials – RdAMM2 Belgrade, Serbia, 4th –6th October 2022. 2022;.
https://hdl.handle.net/21.15107/rcub_machinery_5929 .

Trajković, Isaak, Milošević, Miloš, Travica, Milan, Rakin, Marko, Jevtić, Ivana, Sedmak, Aleksandar, Međo, Bojan, "Determining fracture mechanics parameters using the digital image correlation method on cylindrical samples produced by different additive manufacturing techniques" in 3rd International Workshop on Reliability and Design of Additively Manufactured Materials – RdAMM2 Belgrade, Serbia, 4th –6th October 2022 (2022),
https://hdl.handle.net/21.15107/rcub_machinery_5929 .