TY - JOUR
T1 - High cycle fatigue life analysis of unidirectional flax/PLA composites through infrared thermography
AU - Charca, Samuel
AU - Jiao-Wang, Liu
AU - Loya, J. A.
AU - Martínez, Miguel A.
AU - Santiuste, Carlos
N1 - Publisher Copyright:
© 2024 The Authors
PY - 2024/9/15
Y1 - 2024/9/15
N2 - The durability of structural components under fatigue loading is a huge concern, especially in laminated composites. During the last few years, flax fibers have also gained an outstanding position as a reinforcement of biopolymeric matrices as polylactic acid (PLA). However, there is limited reported information regarding the fatigue behavior of unidirectional flax/PLA composites. Therefore, fatigue properties of unidirectional flax/PLA composites are evaluated in this work; tools such as infrared thermography and dissipated energy were used in order to establish the fatigue limit, and fracture surface was analyzed. Results show consistent and reliable tensile properties (σut = 234.4 MPa, E = 20.56 GPa, and εf = 0.0181). The fatigue stress-cycle curve was established and fitted to the Basquin and Weibull fatigue models and the fatigue limit (σ∞) was obtained as 0.4343 and 0.426 using the thermography and dissipated energy, respectively. Furthermore, the fatigue fracture surface presents a striation on the matrix due to the progressive crack propagation.
AB - The durability of structural components under fatigue loading is a huge concern, especially in laminated composites. During the last few years, flax fibers have also gained an outstanding position as a reinforcement of biopolymeric matrices as polylactic acid (PLA). However, there is limited reported information regarding the fatigue behavior of unidirectional flax/PLA composites. Therefore, fatigue properties of unidirectional flax/PLA composites are evaluated in this work; tools such as infrared thermography and dissipated energy were used in order to establish the fatigue limit, and fracture surface was analyzed. Results show consistent and reliable tensile properties (σut = 234.4 MPa, E = 20.56 GPa, and εf = 0.0181). The fatigue stress-cycle curve was established and fitted to the Basquin and Weibull fatigue models and the fatigue limit (σ∞) was obtained as 0.4343 and 0.426 using the thermography and dissipated energy, respectively. Furthermore, the fatigue fracture surface presents a striation on the matrix due to the progressive crack propagation.
KW - Biodegradable
KW - Composite material
KW - Fatigue properties
KW - Infrared thermography
KW - Scanning electron microscopy
UR - http://www.scopus.com/inward/record.url?scp=85197648509&partnerID=8YFLogxK
U2 - 10.1016/j.compstruct.2024.118370
DO - 10.1016/j.compstruct.2024.118370
M3 - Article
AN - SCOPUS:85197648509
SN - 0263-8223
VL - 344
JO - Composite Structures
JF - Composite Structures
M1 - 118370
ER -