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Frequency-dependent fatigue properties of additively manufactured PLA
ID
Česnik, Martin
(
Avtor
),
ID
Slavič, Janko
(
Avtor
)
URL - Izvorni URL, za dostop obiščite
https://www.mdpi.com/2073-4360/16/15/2147
Galerija slik
Izvleček
Vibration-fatigue failure occurs when a structure is dynamically excited within its natural frequency range. Unlike metals, which have constant fatigue parameters, polymers can exhibit frequency-dependent fatigue parameters, significantly affecting the vibration resilience of 3D-printed polymer structures. This manuscript presents a study utilizing a novel vibration-fatigue testing methodology to characterize the frequency dependence of polymer material fatigue parameters under constant temperature conditions. In this investigation, 3D-printed PLA samples with frequency-tunable geometry were experimentally tested on an electro-dynamical shaker with a random vibration profile. Using the validated numerical models, the estimation of vibration-fatigue life was obtained and compared to the experimental results. Performing the numerical minimization of estimated and actual fatigue lives, the frequency-dependent fatigue parameters were assessed. In particular, the results indicate that the tested samples exhibit varying fatigue parameters within the loading frequency range of 250–750 Hz. Specifically, as the loading frequency increases, the fatigue exponent increases and fatigue strength decreases. These findings confirm the frequency dependence of fatigue parameters for 3D-printed polymer structures, underscoring the necessity of experimental characterization to reliably estimate the vibration-fatigue life of 3D-printed polymer structures. The utilization of the introduced approach therefore enhances the vibration resilience of the 3D-printed polymer mechanical component.
Jezik:
Angleški jezik
Ključne besede:
fatigue properties
,
frequency dependence
,
vibration-fatigue test
,
high-frequency dynamic responses
Vrsta gradiva:
Članek v reviji
Tipologija:
1.01 - Izvirni znanstveni članek
Organizacija:
FS - Fakulteta za strojništvo
Status publikacije:
Objavljeno
Leto izida:
2024
Št. strani:
13 str.
Številčenje:
Vol. 16, no. 15, art. 2147
PID:
20.500.12556/RUL-159913
UDK:
620.178.3
ISSN pri članku:
2073-4360
DOI:
10.3390/polym16152147
COBISS.SI-ID:
203108099
Datum objave v RUL:
30.07.2024
Število ogledov:
111
Število prenosov:
11
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Objavi na:
Gradivo je del revije
Naslov:
Polymers
Skrajšan naslov:
Polymers
Založnik:
Molecular Diversity Preservation International
ISSN:
2073-4360
COBISS.SI-ID:
517951257
Licence
Licenca:
CC BY 4.0, Creative Commons Priznanje avtorstva 4.0 Mednarodna
Povezava:
http://creativecommons.org/licenses/by/4.0/deed.sl
Opis:
To je standardna licenca Creative Commons, ki daje uporabnikom največ možnosti za nadaljnjo uporabo dela, pri čemer morajo navesti avtorja.
Sekundarni jezik
Jezik:
Slovenski jezik
Ključne besede:
lastnosti utrujenosti
,
frekvenčna odvisnost
,
preskus vibracij
,
preskus utrujenosti
,
visokofrekvenčni dinamični odzivi
Projekti
Financer:
ARRS - Agencija za raziskovalno dejavnost Republike Slovenije
Številka projekta:
P2-0263
Naslov:
Mehanika v tehniki
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