The Effect of Hilbert Curve Pattern Intensity in ASTM D638 Type III on Stress Concentration and Cyclic Application

• Published in: Advanced Structured Materials
• Main Author: Sheikh Abdul Nasir S.M.F.; Abd Wahid K.A.; Farhan Saniman M.N.; Wan Muhammad W.M.; Bin Ramlee M.F.
• Format: Book chapter
• Language: English
• Published: Springer Science and Business Media Deutschland GmbH 2022
• Online Access: https://www.scopus.com/inward/record.uri?eid=2-s2.0-85126667960&doi=10.1007%2f978-3-030-92964-0_13&partnerID=40&md5=25fa631e2d7ad2c8e612d0f6c770adf0

Various infill patterns are introduced in 3D printing to generate low-density objects that lead to reduced cost and fabrication time through mass reduction. However, as a trade-off, the strength of the 3D printed component is uncertain. Many works have been carried out to investigate the overall strength of the infill pattern but most of them do not address the specific study of the stress concentration region and cyclic loading durability. This paper focuses on investigating an effect of stress concentration region and cyclic loading durability of Hilbert curve pattern in a 3D printer sample that has been designed by following the ASTM D638 Type III standard. The density percentage of the infill pattern was varied from 20 to 60%. The analysis has been carried out by using the computational method. The results show that the stress concentration region is increased proportionally with infill density percentage probably due to the increasing of sharp edges amount in the Hilbert curve pattern. On the other hand, the results have shown that cyclic loading durability is inverse proportionally where the sample with 20% of infill density can withstand until 5000 times cycles under continuous cyclic loading and has been reduced consistently when the infill increases to 60% which the sample able to withstand up to 600 times cycles before the break. © 2022, The Author(s), under exclusive license to Springer Nature Switzerland AG.