Investigating mechanical properties of 3D printed parts manufactured in different orientations on multijet printer

Chand, Ramesh; Sharma, Vishal S.; Trehan, Rajeev

doi:10.1504/ijmms.2021.119157

Cited by 2 publications

(1 citation statement)

References 21 publications

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“…The final printed material, VisiJet M2R-WT (Rigid White), was produced using a Projet MJP 2500 printer from 3D Systems (Wilsonville, Oregon). VisiJet White material is rated for medical applications 28 with tensile strength rated between 35 and 45 MPa and Young’s modulus between 1500 and 2000 MPa. The final design assembly is shown in Figs.…”

Section: Methodsmentioning

confidence: 99%

Speculum-free portable preterm imaging system

Boonya-ananta,

Gonzalez,

Ajmal

et al. 2024

J. Biomed. Opt.

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Preterm birth is defined as a birth before 37 weeks of gestation and is one of the leading contributors to infant mortality rates globally. Premature birth can lead to life-long developmental impairment for the child. Unfortunately, there is a significant lack of tools to diagnose preterm birth risk, which limits patient care and the development of new therapies.Aim: To develop a speculum-free, portable preterm imaging system (PPRIM) for cervical imaging; testing of the PPRIM system to resolve polarization properties of birefringent samples; and testing of the PPRIM under an IRB on healthy, nonpregnant volunteers for visualization and polarization analysis of cervical images. Approach:The PPRIM can perform 4 × 3 Mueller-matrix imaging to characterize the remodeling of the uterine cervix during pregnancy. The PPRIM is built with a polarized imaging probe and a flexible insertable sheath made with a compatible flexible rubber-like material to maximize comfort and ease of use. Results:The PPRIM device is developed to meet specific design specifications as a speculum-free, portable, and comfortable imaging system with polarized imaging capabilities. This system comprises a main imaging component and a flexible silicone inserter. The inserter is designed to maximize comfort and usability for the patient. The PPRIM shows high-resolution imaging capabilities at the 20 mm working distance and 25 mm circular field of view. The PPRIM demonstrates the ability to resolve birefringent sample orientation and full field capture of a healthy, nonpregnant cervix. Conclusion:The development of the PPRIM aims to improve access to the standard of care for women's reproductive health using polarized Mueller-matrix imaging of the cervix and reduce infant and maternal mortality rates and better quality of life.

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Section: Methodsmentioning

confidence: 99%

Speculum-free portable preterm imaging system

Boonya-ananta,

Gonzalez,

Ajmal

et al. 2024

J. Biomed. Opt.

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Numerical investigations on mechanical properties of bio-inspired 3D printed geometries using multi-jet fusion process

Chand

Sharma

Trehan

et al. 2023

RPJ

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Purpose The purpose of this study is to find the best geometries among the cylindrical, enamel and honeycomb geometries based upon the mechanical properties (tensile test, compression test and shear test). Further this obtained geometry could be used to fabricate products like exoskeleton and its supporting members. Design/methodology/approach The present research focuses on the mechanical testing of cylindrical, enamel and honeycomb-shaped parts fabricated through multi-jet printing (MJP) process with a wall thickness of 0.26, 0.33, 0.4 and 0.66 mm. The polymer specimens (for tensile, compression and shear tests) were fabricated using a multi-jet fusion process. The experimental results were compared with the numerical modelling. Finally, the optimal geometry was obtained, and the influence of wall thicknesses on various mechanical properties (tensile, compression and shear) was studied. Findings In comparison to cylindrical, enamel structures the honeycomb structures required less time to fabricate and had lower tensile, compressive and shear strengths. The most efficient geometry for fully functional parts where tensile, compressive and shear forces are present during application – cylindrical geometry is preferred followed by enamel, and then honeycomb. It was found that as the wall thickness of various geometries was increased, their ability to withstand tensile, compressive and shear loads also enhanced. The enamel shape structure exhibits greater strain energy storage capacity than other shape structures for compressive loads, and the strength to resist the compressive load will be lower. In the case of cylindrical geometries for tensile loading, the resisting area toward the loading will be higher in comparison to honeycomb- and enamel-based structures. At the same time, the ability to store the stain energy is less. The results of the tensile, compression and shear load finite element analysis using ANSYS are in agreement with those of the experiments. Originality/value From the insight of literature review, it is found that a wide range of work is done on fused deposition modeling (FDM) process. But in comparison to FDM, the MJP provide the better dimensional accuracy and surface properties (Lee et al., 2020). Therefore, it is observed that past research works not incorporated the effect of wall thickness of the embedded geometries on mechanical properties of the part fabricated on MJP (Gibson, n.d.). Hence, in this work, effect of wall thickness on tensile, compression and shear strength is considered as the main factor for the honeycomb, enamel and cylindrical geometries.

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Investigating mechanical properties of 3D printed parts manufactured in different orientations on multijet printer

Cited by 2 publications

References 21 publications

Speculum-free portable preterm imaging system

Speculum-free portable preterm imaging system

Numerical investigations on mechanical properties of bio-inspired 3D printed geometries using multi-jet fusion process

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