Design and Analysis of the Impact of Ultraviolet Aging on the Mechanical Properties and Durability of PLA Lattice Structures
Published: 2024-06-29
Page: 287-301
Issue: 2024 - Volume 7 [Issue 2]
Alexander Osayimwense Osadolor *
Centre for Sustainable Engineering, School of Computing, Engineering and Digital Technologies Teesside University, Middlesbrough, United Kingdom.
Afeez Olamide Showole
Centre for Sustainable Engineering, School of Computing, Engineering and Digital Technologies Teesside University, Middlesbrough, United Kingdom.
Tochukwu Judethaddeus Eze
Centre for Sustainable Engineering, School of Computing, Engineering and Digital Technologies Teesside University, Middlesbrough, United Kingdom.
Victor Ajayi
Centre for Sustainable Engineering, School of Computing, Engineering and Digital Technologies Teesside University, Middlesbrough, United Kingdom.
Robertson Ojeka Owulo
Centre for Sustainable Engineering, School of Computing, Engineering and Digital Technologies Teesside University, Middlesbrough, United Kingdom.
*Author to whom correspondence should be addressed.
Abstract
This study explores the design and performance evaluation of PLA (Polylactic acid) lattice structures, with a focus on understanding the eventuality of UV (Ultraviolet) radiation exposure on their mechanical properties. Utilizing Siemens NX software, a 40mm cubic lattice structure with 8mm squared perforations, was designed for optimal performance. With the use of compressive tests, the properties and structural integrity of the 3D printed lattice structures of 50.4% porosity were put to the test. Comprehensive analysis of the stress-displacement data revealed critical insights into the modes of failure as they were aged. Results indicated that short wave UV exposure of wavelength between 365 to 295 nm increased the brittleness of the PLA structures, as evidenced by higher Young's modulus and enhanced compressive strength over time. However, prolonged aging also led to increased displacement on the maximum compressive force from 2.72mm to 3.21mm and compressive strain at the maximum compressive force from 6.81% to 8.02%, suggesting progressive material deterioration. Findings from this study add to a deeper perception of the behavior of PLA under accelerated testing, simulating environmental effects, informing future design and material selection for improved durability and performance in engineering applications. This study provides an understanding of the performance of PLA under UV exposure, contributing to the development of more sustainable additive manufacturing materials, as the findings highlighted the need for careful consideration of the effects UV aging in the design and application of PLA lattice structures.
Keywords: PLA, lattice structures, additive manufacturing, aging test, sustainable design
How to Cite
References
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