Failure analysis of nylon gears made by additive manufacturing

Muminović, Adis J.; Pervan, Nedim; Delić, Muamer; Muratović, Enis; Mešić, Elmedin; Braut, Sanjin

doi:10.1016/j.engfailanal.2022.106272

Cited by 20 publications

(12 citation statements)

References 12 publications

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“…The receiving unit comprises nylon gear, rack, optical shaft and bearing seat. With the development of new polymer-based materials and additive manufacturing, polymer gears are more widely used [8] . Polymer gears and racks are lighter in weight and require less driving force.…”

Section: Structure Of the Planting Machinementioning

confidence: 99%

Design and Optimization Key Structure of Planting Machine for Rock Wool Block Seedlings

Zhai

Ding²,

Gao³

2023

J. Phys.: Conf. Ser.

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Aiming at the problems of poor automation and low efficiency in tomato planting, this paper designed a fully automatic rock wool seedling planting machine. We designed the machine’s overall structure according to the agronomic requirements of tomatoes and the actual site. In addition, according to the uncertainty of contact between the rock wool block (RWB) and soil matrix, the corresponding motion behavior model after collision contact was established to predict the motion of RWB. The parameterized modeling of the soil matrix was carried out, and then a structure with an adaptive function was added to the original machine for optimization. The machine was processed, manufactured, and tested. The success rate of colonization was 99.4%, and the efficiency was 1500 per hour. The study can provide a reference for the automatic tomato planting machine design.

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Section: Structure Of the Planting Machinementioning

confidence: 99%

Design and Optimization Key Structure of Planting Machine for Rock Wool Block Seedlings

Zhai

Ding²,

Gao³

2023

J. Phys.: Conf. Ser.

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“…The automotive sector is responsible for 35% of PA consumption, the largest PA consumer [23] . Polyamide 6 and PA66 are also prominent in the manufacture of gears for automotive use [24][25][26][27][28] , while the use of nylon 66 can also be seen in the manufacture of leaf springs [29] .…”

Section: Pa6 Pa66 and Pa12: Application In The Automotive Industrymentioning

confidence: 99%

“…[8] Use of PA6 for gears and bearing. [24], [25], [28], [30], [31] Use of Carbon Fiber Reinforced PA6 for structural car parts.…”

Section: Highlight Informationmentioning

confidence: 99%

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Recent advances in the use of Polyamide-based materials for the automotive industry

et al. 2022

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Polyamide (PA) is a well-known and researched thermoplastic due to its excellent mechanical and physical properties, making it developed in the automotive sector, suitable for lighter vehicles, and, consequently, lower fuel consumption. This review manuscript presents the applications of PA-based materials in the manufacture of vehicle parts, with a description of their processing, a discussion about their thermal properties and the crystallization of polymer structure, the challenges of machining PA-based composite materials, and the feasibility of recyclability. This work aims to revise literature about the use of polyamide 6 (PA6), polyamide 66 (PA66), and polyamide 12 (PA12) and their composites reinforced with fiberglass (FG) and carbon fiber (CF) focused on the potential that these materials have as alternative materials for the automotive industry.

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“…Experimental studies have been carried out to analyse various parameters, mainly build plate orientation, infill density, infill pattern, layer thickness, bed plate temperature, printing speed and infill direction. These parameters dominantly affect the FDM printing of various thermoplastics and reinforced thermoplastics (Cho et al , 2019; Cojocaru et al , 2022; Doshi et al , 2022; Lokesh et al , 2022; Muminovic et al , 2022; Vălean et al , 2020; Ya’akub et al , 2021; Guan and Smith, 2020) analysed the impact of infill parameters on the tensile mechanical properties of FDM-printed parts and reported that upon increasing specimen density, the strength and modulus of printed parts increased. However, the ductility did not surge with density but was found to be dependent on other parameters like infill pattern and infill density.…”

Section: Introductionmentioning

confidence: 99%

Investigating the large strain compression properties of PLA parts manufactured by FDM using experiments and constitutive modeling

Maheshwari,

Alam,

Singh

2024

RPJ

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Purpose The purpose of this study is to experimentally investigate the large deformation compression characteristics of fused deposition modelling (FDM)-printed poly lactic acid (PLA), considering the combined effect of infill density and strain rate, and to develop a constitutive viscoplastic model that can incorporate the infill density to predict the experimental result. Design/methodology/approach The experimental approach focuses on strain rate-dependent (2.1 × 10−4, 2.1 × 10−3, and 2.1 × 10−2 s−1) compression testing for varied infill densities. Scanning electron microscopy (SEM) imaging of compressed materials is used to investigate deformation processes. A hyperelastic-viscoplastic constitutive model is constructed that can predict mechanical deformations at different strain rates and infill densities. Findings The yield stress of PLA increased with increase in strain rate and infill density. However, higher degree of strain-softening response was witnessed for the strain rate corresponding to 2.1 × 10−2 s−1. While filament splitting and twisting were identified as the damage mechanisms at higher strain rates, matrix crazing was observed as the primary deformation mechanism for higher infill density (95%). The developed constitutive model captured yield stress and post-yield softening behaviour of FDM build PLA samples with a high R2 value of 0.99. Originality/value This paper addresses the need to analyse and predict the mechanical response of FDM print polymers (PLA) undergoing extensive strain-compressive loading through a hyperelastic-viscoplastic constitutive model. This study links combined effects of the printing parameter (infill density) with the experimental parameter (strain rate).

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Failure analysis of nylon gears made by additive manufacturing

Cited by 20 publications

References 12 publications

Design and Optimization Key Structure of Planting Machine for Rock Wool Block Seedlings

Design and Optimization Key Structure of Planting Machine for Rock Wool Block Seedlings

Recent advances in the use of Polyamide-based materials for the automotive industry

Investigating the large strain compression properties of PLA parts manufactured by FDM using experiments and constitutive modeling

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