Environmental stress cracking of polymers: Case studies from industry (ABS and LDPE)

Dooher, Thomas; Saifullah, Abu; Ullah, Jawad; Magee, Ciarán; Mulholland, Adrian J.; Dixon, Dorian

doi:10.1016/j.engfailanal.2022.106120

Cited by 4 publications

(4 citation statements)

References 22 publications

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“…Chemical Resistance is a material property which can be determined through a process. In this, polymer sample is taken and load it in strain jig with indicated strain level [6]. Different chemicals are applied on surface for a day then measure the impact energy to break which is measured in percentage retention.…”

Section: Methodsmentioning

confidence: 99%

Failure Analysis of Radio Frequency Coil in MRI System

Sale,

Pise

2023

J. Phys.: Conf. Ser.

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Magnetic Resonance Imaging system and their working is itself very complex in nature. Any minor non-compliance will lead to failure of entire radio frequency coil. In this research paper, we are considering the failure of coil due to breakage of studs on outer frame during assembly. Seven Quality Control Techniques are used to find the root cause and check the effectiveness of implemented measures. Existing material shows extra stickiness during molding operation, that increases the stress within frame. Manual heat stacking process is used for insertion of metal insert, due to its uncontrollable measures, bulging was observed on studs. Sharp edges on the frame concentrate the stress and accelerate the breakage of stud while torquing screw. After research, we finalize alternative material which show better molding properties, introduced automation in heat stacking process and changed design of molding tool. In proto batch production, considerable change observed, like 18% decrease in maximum principal stress and 12% decrease in total deflection were observed.

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Section: Methodsmentioning

confidence: 99%

Failure Analysis of Radio Frequency Coil in MRI System

Sale,

Pise

2023

J. Phys.: Conf. Ser.

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“…Presently, it is ranked as the third most used thermoplastic, with only ABS and PLA being more widespread. Acrylonitrile Butadiene Styrene (ABS) is an extensively used amorphous polymer in engineering applications [39][40][41], which has led to numerous studies on its mechanical, environmental behavior, and thermal properties.…”

Section: Hybrid Energy Absorber Geometry Design and Applied Materialsmentioning

confidence: 99%

“…Furthermore, due to its outstanding mechanica properties, this material has become frequently used in 3D printing. Presentl as the third most used thermoplastic, with only ABS and PLA being more Acrylonitrile Butadiene Styrene (ABS) is an extensively used amorphous p gineering applications [39][40][41], which has led to numerous studies on its m vironmental behavior, and thermal properties.…”

Section: Hybrid Energy Absorber Geometry Design and Applied Materialsmentioning

confidence: 99%

Effect of 3D-Printed Honeycomb Core on Compressive Property of Hybrid Energy Absorbers: Experimental Testing and Optimization Analysis

Silva,

Castro,

Oliveira

et al. 2024

Materials

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This paper presents an innovative method of constructing energy absorbers, whose primary function is to effectively transform kinetic energy into strain energy in events with high deformation rates. Hybrid specimens are proposed considering thin-walled windowed metallic tubes filled with 3D-printed hexagonal honeycombs made of PET-G and ABS thermoplastic. The patterned windows dimensions vary from 20 × 20, 20 × 30, 15 × 20 and 15 × 30 mm2. Although using polymers in engineering and thin-walled sections is not new, their combination has not been explored in this type of structure designed to withstand impacts. Specimens resist out-of-plane quasi-static axial loading, and test results are analyzed, demonstrating that polymer core gives the samples better performance parameters than unfilled samples regarding energy absorption (Ea), load rate (LR), and structural effectiveness (η). An optimization procedure using specialized software was applied to evaluate experimental results, which led to identifying the optimal window geometry (16.4 × 20 mm2, in case) and polymer to be used (ABS). The optimized sample was constructed and tested for axial compression to validate the optimization outcomes. The results reveal that the optimal sample performed similarly to the estimated parameters, making this geometry the best choice under the test conditions.

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“…For polymers, such as ABS, the mechanical properties vary considerably from those observed in metals [4,5]. As ABS is used in various applications hence the material has been of particular interest to researchers leading to several studies of different type [6][7][8][9][10]. The present investigation is thus aimed at understanding the effect of high strain rate loading (>1000 /s) on the dynamic response of ABS for potential benefits in energy absorption in mechanical and structural applications.…”

Section: Introductionmentioning

confidence: 99%

Dynamic mechanical response of ABS polymer at elevated strain rates and temperatures

Sharma

Chandra

Chavan

et al. 2022

IOP Conf. Ser.: Mater. Sci. Eng.

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Acrylonitrile butadiene styrene (ABS) is an extensively used material for various applications from automobile to toys. The material is known to have good machinability along with toughness and thermal-stability. The present investigation is aimed at understanding the effect of high strain rate loading (>1000 /s) on the dynamic response of ABS for potential benefits in energy absorption in mechanical and structural applications. Considering this, uniaxial compression tests on ABS polymer have been performed at different high strain rates (1000 /s – 4000 /s) and temperatures (250C – 1100C) using split Hopkinson Bar (SHB) test setup. The results indicate that the material shows a linear relationship between the true stress and the true strain up to its yield point. High plastic deformation is observed at higher strain rates along with higher levels of stress. However, as the strain rate is increased, there is more evidence of collapse ultimately leading to the failure of the specimens. The material is not much sensitive to strain rate. These high strain rate data may be useful for safety and structural integrity assessment of structures subjected to dynamic loading.

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Environmental stress cracking of polymers: Case studies from industry (ABS and LDPE)

Cited by 4 publications

References 22 publications

Failure Analysis of Radio Frequency Coil in MRI System

Failure Analysis of Radio Frequency Coil in MRI System

Effect of 3D-Printed Honeycomb Core on Compressive Property of Hybrid Energy Absorbers: Experimental Testing and Optimization Analysis

Dynamic mechanical response of ABS polymer at elevated strain rates and temperatures

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