Characterization of Mechanical Property of PLA-ABS Functionally Graded Material Fabricated by Fused Deposition Modeling

Su, Ziyi; Karmakar, Amit; Das, Apurba

doi:10.1115/gtindia2021-76025

Cited by 5 publications

(3 citation statements)

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“…This tendon is made from 4 braids of Polyethylene (PE) with high max tension (36.2 Kg) and a small diameter (0.5 mm) costing about $1.5 per 100m as shown in Table 6. Because PLA filament has Young's modulus of about 3.04 GPa but ABS material has Young's modulus of about 1.97 GPa [12]. Therefore, the material for 3D printing parts uses PLA (Polylactic acid) filament with a cost (of $17.99 per Kg.)…”

Section: Actuation Power Transmission and Pla Materialsmentioning

confidence: 99%

Design of an Open Source Anthropomorphic Robotic Hand for Telepresence Robot

Trichada¹,

Wimonrut²,

Tirasuntarakul³

et al. 2023

Adv. sci. technol. eng. syst. j.

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Most anthropomorphic robotic hands use a lot of actuators to imitate the number of joints and the movement of the human hand. As a result, the forearm of the robot hand has a large size for the installation of all actuators. This robot hand is designed to reduce the number of actuators, but also retain the number of movable joints like a human hand by using the fourbar linkage mechanism and only flexion-extension movements. This stamen is added in the problem statement according to the reviewer's comment. The special features of this robotic hand are the ability to adjust the link length and the range of rotation for each joint to suit various applications and can fabricate with 3D printing and standard parts with costing about $750. All hardware CAD files and equations are published on the GitHub website, which benefits for researchers to utilize as an open-source approach that their project might be further expanded in the future. The anthropomorphic robotic hand has five fingers, 16 joints, and 12 active Degrees of Freedom (DOFs) with 12 servo motors applied to finger motion and one for wrist motion. The structure of the hand is designed using the average of Asian human hands in combination with the golden ratio. All servo motors are installed in the forearm designed in a ventilated structure with 12V vent exhaust fan motor to stabilize the operating temperature of the robotic hand. Size and weight of the hand included with the forearm are 20×54×16.5 centimeters and 2.2 kilograms respectively. The hand has achieved human-like movement by using a four-bar linkage mechanism and tendon with PTFE tube to guide operation path of the tendon with the lowest friction force. This paper presents the design processes, the experimental set-up, and the evaluation of the finger movements. From the experiment of grasping objects, this hand was able to grasp 10 basic grasp types including 32 different objects, perform 9 common gestures, and lift the object to 450 grams. From this paper, the kinematic equation is proved that the designed finger structure can move exactly as the equation with maximum error of repeatability test around 1.6 degrees.

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Section: Actuation Power Transmission and Pla Materialsmentioning

confidence: 99%

Design of an Open Source Anthropomorphic Robotic Hand for Telepresence Robot

Trichada¹,

Wimonrut²,

Tirasuntarakul³

et al. 2023

Adv. sci. technol. eng. syst. j.

View full text Add to dashboard Cite

show abstract

“…Su et al [ 26 ] produced ABS and PLA polymers as FG using the FDM. They used X-ray computed tomography to evaluate the air gap distribution, Young’s modulus, strain history variation, and the unfilled fraction of the fabricated material and performed the tensile tests.…”

Section: Introductionmentioning

confidence: 99%

Numerical Modeling of Mechanical Behavior of Functionally Graded Polylactic Acid–Acrylonitrile Benzidine Styrene Produced via Fused Deposition Modeling: Experimental Observations

Sevim,

Caliskan,

Demirbas

et al. 2023

Materials

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Functionally graded materials (FGM) have attracted considerable attention in the field of composite materials and rekindled interest in research on composite materials due to their unique mechanical response achieved through material design and optimization. Compared to conventional composites, FGMs offer several advantages and exceptional properties, including improved deformation resistance, improved toughness, lightness properties, and excellent recoverability. This study focused on the production of functionally graded (FG) polymer materials by the additive manufacturing (AM) method. FG structures were produced by the fused deposition modeling (FDM) method using acrylonitrile benzidine styrene (ABS) and polylactic acid (PLA) materials, and tensile tests were performed according to ASTM D638. The effects of different layer thicknesses, volume ratios, and total thicknesses on mechanical behavior were investigated. The tensile standard of materials produced by additive manufacturing introduces geometric differences. Another motivation in this study is to reveal the differences between the results according to the ASTM standard. In addition, tensile tests were carried out by producing single-layer samples at certain volume ratios to create a numerical model with the finite element method to verify the experimental data. As a result of this study, it is presented that the FG structure produced with FDM improves mechanical behavior.

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“…The latter seems to be complicated; however, with the grand advancement in technology and fabrication techniques, it became attainable and easily accomplished. For instance, two methods are being used for this sake: modified slip-casting method 31 and fused deposition modeling method 32 .…”

mentioning

confidence: 99%

A nontraditional method for reducing thermoelastic stresses of variable thickness rotating discs

Eldeeb,

Shabana,

El-Sayed

et al. 2023

Sci Rep

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Stresses reductions and/or raising the load-carrying capacity for a mechanical structure are always great dilemmas for researchers. In this article, a novel method is proposed, and its efficiency is examined for achieving these goals on functionally graded rotating nonuniform thickness discs. The originality of this method relies on comprising a geometrically well-defined area, into the whole structure, with certain homogeneous properties including density, thermal expansion coefficient, and elasticity matrix. This area acts as a reducer of the maximum values of various stress components. The solution of the magnetoelastic/magneto-thermoelastic problem is accomplished using the finite element method. The disc is subjected to partial uniform outer pressure, whereas, upon applying thermal loads; the thermal boundary conditions are considered symmetric. The proposed method is found to be beneficial as the obtained results demonstrated the ability to reduce the maximum stresses with different percentages depending on the location, angular width, and properties of the predefined area. This is reflected by an attainable decrease in the maximum compressive tangential stress and the von Mises stress by approximately 20.7% and 12.5%, respectively, under certain conditions.

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Characterization of Mechanical Property of PLA-ABS Functionally Graded Material Fabricated by Fused Deposition Modeling

Cited by 5 publications

References 0 publications

Design of an Open Source Anthropomorphic Robotic Hand for Telepresence Robot

Design of an Open Source Anthropomorphic Robotic Hand for Telepresence Robot

Numerical Modeling of Mechanical Behavior of Functionally Graded Polylactic Acid–Acrylonitrile Benzidine Styrene Produced via Fused Deposition Modeling: Experimental Observations

A nontraditional method for reducing thermoelastic stresses of variable thickness rotating discs

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