Vibration behaviour of additively manufactured AlSi10Mg specimens DOI Open Access
Claus‐Dieter Ohl, Emanoil Linul, Sergiu-Valentin Galațanu

et al.

IOP Conference Series Materials Science and Engineering, Journal Year: 2024, Volume and Issue: 1319(1), P. 012027 - 012027

Published: Oct. 1, 2024

Abstract Additive manufacturing is in continuous development, and the obtained components still have some shortcomings. The vast majority of mechanical characterizations are performed on polymer materials, using particular material extrusion process, while metallic face not negligible deficiencies. This paper presents an experimental investigation vibration behaviour selective laser melting (SLM) 3D printed specimens. specimens were “on-edge” from AlSi10Mg aluminium alloys subjected to fatigue tests. By electrodynamic shaker, controller, acceleration transducer, vibrometer, tests been data analysed. After tests, a correlation was by finite element analysis (FEA). damping coefficients (alpha beta) data. These then used check accuracy each FEA model. results reveal between structural anisotropy additive specimens, their impact high-cycle performance.

Language: Английский

Compressive Performance of 3D-Printed Lightweight Structures: Infill Density Optimization via Multiple-Criteria Decision Analysis method DOI Creative Commons

Cristina Vălean,

Emanoil Linul, Dipen Kumar Rajak

et al.

Results in Engineering, Journal Year: 2025, Volume and Issue: unknown, P. 103936 - 103936

Published: Jan. 1, 2025

Language: Английский

Citations

2
Tensile, flexural and fracture properties of MEX-printed PLA-based composites DOI Creative Commons
Dan Ioan Stoia, Emanoil Linul

Theoretical and Applied Fracture Mechanics, Journal Year: 2024, Volume and Issue: 132, P. 104478 - 104478

Published: May 22, 2024

Due to the continuous development of material extrusion-additive manufacturing (MEX-AM) technology, fracture behavior polymeric parts, and especially their associated composites, presents some shortcomings but also a challenge in field. In this paper, properties non-reinforced (NR) reinforced Polylactic Acid (PLA) samples manufactured by MEX-AM process are investigated through tensile, flexural mechanics tests. The with glass fibers (GF-PLA), carbon (CF-PLA) bronze particles (BP-PLA), tested parallel (named FLAT for all tests) normal UPRIGHT tensile test, ON-EDGE layer growth (LG). It was found that regardless type LG significantly influence mechanical collapse modes MEX-printed samples. obtained parallel-LG load is favorable tests, normal-LG Overall, NR-PLA gives best strength, strain energy absorption properties, CF-PLA stands out as stiffest material, while BP-PLA minimum performances almost properties. macroscopic analyzes fractured clearly highlight distinct failure mechanisms each LG. From analysis macrostructural images, identified most brittle ductile.

Language: Английский

Citations

10
Low-cycle compression-compression fatigue behavior of MEX-printed PLA parts DOI Creative Commons

Cristina Vălean,

Imre Norbert Orbulov, Alexandra Kemény

et al.

Engineering Failure Analysis, Journal Year: 2024, Volume and Issue: 161, P. 108335 - 108335

Published: April 17, 2024

Due to cyclic loads, additively manufactured (AM) parts can collapse at lower stress values than the strength corresponding static loads. To date, there is limited research on fatigue life of AM polymers. The present work investigates behavior material extrusion (MEX) printed Polylactic acid (PLA) parts. In this regard, low-cycle (LCF) domain was studied and a compression-compression test setup adopted. Initially, before experimental tests, MEX-printed samples were subjected physical assessments. presented high accuracy with dimensional relative errors below 0.04 %, while 6.66 % noted as their mass error. Subsequently, quasi-static tests performed in order determine mechanical parts, special focus S-N (or Wöhler) curve. compression PLA typical cellular materials, highlighting shear band failure mechanism. Five load levels used plot curve its 95 level confidence bands. force-controlled mode asymmetry ratio R = 0.1 frequency f 10 Hz. An exponential relationship also found between strain break number cycles until failure. occurred suddenly.

Language: Английский

Citations

6
Compressive behavior of additively manufactured lightweight structures: infill density optimization based on energy absorption diagrams DOI Creative Commons

Cristina Vălean,

Liviu Marşavina, Emanoil Linul

et al.

Journal of Materials Research and Technology, Journal Year: 2024, Volume and Issue: unknown

Published: Oct. 1, 2024

Language: Английский

Citations

3
Sustainable, Antifouling Poly (ethylene Furanoate)/ Poly (lactic Acid) (PEF/PLA) Blend Electrospun Nanofibrous Membranes for Switchable Premix Emulsification/Demulsification DOI Creative Commons
Kandiyil Juraij, Anuj Niroula, Yaser E. Greish

et al.

Journal of Membrane Science, Journal Year: 2024, Volume and Issue: unknown, P. 123622 - 123622

Published: Dec. 1, 2024

Language: Английский

Citations

1
Analysis of the limitations of organic powder for high‐temperature reprocessing of printed PLA parts DOI Open Access
Leonardo Santana,

João F. F. Machado,

Guilherme Mariz de Oliveira Barra

et al.

Applied Research, Journal Year: 2024, Volume and Issue: unknown

Published: Aug. 7, 2024

Abstract Fused filament fabrication (FFF) is the most predominant additive manufacturing technology, not only in industry but also for many hobbyists. This technology's popularity because it inexpensive, user‐friendly, and open source. However, compared to other processes, like injection molding, FFF products still have some limitations, particularly mechanical properties. Despite this, post‐processing techniques been developed improve such One of these involves applying heat treatments (HT). The objective HTs densify increase crystallization degree semi‐crystalline polylactic acid (PLA). kind claimed be a viable way reprocessing powder bed type HT which prevents thermal distortion by using as mold component. should low cost easy access any user. In this work, was performed flexural samples with an organic (corn flour) has improved maximum strength (MFS) modulus (FM) 18% 14%, respectively. color parts, before after HT, measured slight modification response observed due HT. gains properties, verified that corn flour produces considerable amount smoke during Thus, thermogravimetric analysis (TGA) three types powders, namely flour, coffee powder, starch. It concluded starch best one, however considering all powders release smoke, advisable use them

Language: Английский

Citations

0
Analyzing the Mechanical Performance of Porous TPEs Under Various Operating Conditions DOI
Ahmed H. Mohammad, Muhannad Al‐Waily, Emad Kadum Njim

et al.

Lecture notes in networks and systems, Journal Year: 2024, Volume and Issue: unknown, P. 404 - 418

Published: Jan. 1, 2024

Language: Английский

Citations

0
Effect of different parameters on mode I fracture toughness of resin samples manufactured by DLP DOI Open Access

Marian Vasile Baban,

Alexandru Viorel Coşa,

Emanoil Linul

et al.

IOP Conference Series Materials Science and Engineering, Journal Year: 2024, Volume and Issue: 1319(1), P. 012018 - 012018

Published: Oct. 1, 2024

Abstract Additive manufacturing is spreading rapidly in almost all industries, from household to advanced engineering. Components produced by Digital Light Processing (DLP) are not comprehensively characterized, but exceed the capabilities of many AM processes. Its advantages include ability produce highly complex designs, superior precision, fast printing and lower operating costs. The present paper investigates mode I fracture toughness (K IC ) UV-sensitive resin specimens obtained through DLP process. Single edge notch bending (SENB) specimen were 3D printed tested according ASTM D5045 standard. influence orientation-PO (0°, 45° 90°), color-RC (white, black transparent) corrosive environment-CE (air, water saline solution) was studied. It observed that studied parameters have some effect on properties. highest K values for 45°-PO, white-RC (1.88 MPa•m 0.5 solution-CE (2.24 ). However, greatest highlighted RC (∼92%), while CE (∼32%) shows a minimal effect. surface investigated samples influenced parameters.

Language: Английский

Citations

0
Vibration behaviour of additively manufactured AlSi10Mg specimens DOI Open Access
Claus‐Dieter Ohl, Emanoil Linul, Sergiu-Valentin Galațanu

et al.

IOP Conference Series Materials Science and Engineering, Journal Year: 2024, Volume and Issue: 1319(1), P. 012027 - 012027

Published: Oct. 1, 2024

Abstract Additive manufacturing is in continuous development, and the obtained components still have some shortcomings. The vast majority of mechanical characterizations are performed on polymer materials, using particular material extrusion process, while metallic face not negligible deficiencies. This paper presents an experimental investigation vibration behaviour selective laser melting (SLM) 3D printed specimens. specimens were “on-edge” from AlSi10Mg aluminium alloys subjected to fatigue tests. By electrodynamic shaker, controller, acceleration transducer, vibrometer, tests been data analysed. After tests, a correlation was by finite element analysis (FEA). damping coefficients (alpha beta) data. These then used check accuracy each FEA model. results reveal between structural anisotropy additive specimens, their impact high-cycle performance.

Language: Английский

Citations

0