Investigation of fatigue and mechanical properties of the pipe grade poly(vinyl chloride) using recycled scraps

Lee, J. M.; Moon, Jong Sin; Lee, H.; Choi, Byoung Ho

doi:10.3144/expresspolymlett.2015.34

Cited by 8 publications

(6 citation statements)

References 16 publications

(19 reference statements)

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“…The same method was applied for stainless steel and glass fibre. For PVC however, the fatigue limit stress was approximated from literature [36] as a two-segment curve fit was not compatible with the experimental data. The data for PVC was determined to adopt a single-segment curve fit instead.…”

Section: Evaluation Of Mechanical Damping Ratio and Fatigue Limit Strmentioning

confidence: 99%

Important considerations in optimising the structural aspect of a SDOF electromagnetic vibration energy harvester

Foong

Thein

Yurchenko

2020

Journal of Sound and Vibration

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This study investigates several important considerations to be made when optimising the structural aspects of a single-degree-of-freedom (SDOF) electromagnetic vibration energy harvester. Using the critically damped stress method, the damping and power output of the harvester were modelled and verified, displaying an excellent agreement with the experimental results. The SDOF harvester was structurally optimised under a certain set of constraints and it was found that under the fixed beam's thickness condition, the harvester displayed an insignificant increase in power output as a function of volume when the device's size was relatively larger. This highlights the importance of considering a smaller practical volume for this case. Additionally, when optimising the device using a low stress constraint and a low damping material, it was observed that considering the load resistance as an input parameter to the objective function would lead to a higher power output compared to the optimum load resistance condition. Further analysis indicated that there exists a power limit when the electromagnetic coupling coefficient approaches infinity. For the case of a high electromagnetic coupling coefficient value and a small volume constraint, it is possible to achieve approximately 80.0% of the harvester's power limit. Finally, it was demonstrated that a high power output can be achieved for a SDOF electromagnetic harvester by considering a high-density proof mass centred at the free end of the beam.

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Section: Evaluation Of Mechanical Damping Ratio and Fatigue Limit Strmentioning

confidence: 99%

Important considerations in optimising the structural aspect of a SDOF electromagnetic vibration energy harvester

Foong

Thein

Yurchenko

2020

Journal of Sound and Vibration

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“…In a critical plane search, CED was utilised for fatigue crack initiation/growth prediction. [1][2][3][4][5] S-N (W€ ohler) curves, in a form of either maximum stress 6,7 or stress amplitude against failure cycles, 8 were employed to predict fatigue damage. A concept of effective stress [9][10][11] was proposed and applied to both proportional and non-proportional fatigue cases.…”

Section: Introductionmentioning

confidence: 99%

Rubber fatigue evaluation for antivibration products and an S–N curve with a scatter band of 0.8

Luo

2021

Proceedings of the Institution of Mechanical Engineers, Part L:

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Rubber antivibration products are widely used in engineering structures. An accurate evaluation on fatigue performance is a challenging issue during a design procedure. In this article, an effective stress approach was applied to multi-directional snubbing (MDS) mounts, AE2 and AE42 specimens. It was demonstrated that observed fatigue cracks were initiated at a place where the maximum effective stress was located. There were confirmed strong correlations between the effective stress and the number of failed cycles: R2 = 0.994 for AE2 with eight fatigue cases, R2 = 0.955 for AE42 with 16 cases and R2 = 0.917 for both AE2 and AE42 with 24 cases. A valuable S–N curve (covering from 2 × 102 to 3 × 106 cycles) of rubber (SBR with 67 hardness) was obtained (a scatter-band range of 0.8 with an average standard deviation of 14.3%). The scatter band includes both natural fatigue scattering and criterion accuracy. Less than 10% CPU time, compared with the critical plane search method, would only be required for evaluation on a fatigue case of a two-dimensional solid. These findings have shown that the proposed approach is reliable and can be considered in a suitable fatigue design stage. As the presented criterion was validated in limited contexts, more cases in antivibration design are required to support this approach.

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“…Poly(vinyl chloride) (PVC) has been widely known and used as a commodity plastic for a century. The nature of uncompounded PVC is very brittle with low tensile elongation at break, poor impact strength and low thermal stability [1][2][3][4][5][6]. Thus, prior to processing PVC, numerous additives are needed to be added for some proper applications.…”

Section: Introductionmentioning

confidence: 99%

“…Theoretically, the plasticizer acts as PVC molecular chain lubricant. This lets PVC chains to move independently under applied load [3,8]. The plasticizer molecular weight is one of the key parameters of the plasticization efficiency.…”

Section: Introductionmentioning

confidence: 99%

Plasticization of Poly(Vinyl Chloride) by Non-Carcinogenic Bio-Plasticizers

Petchwattana

Kerdsap

Sukkaneewat

2020

KEM

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In this paper, three different plasticizer molecular sizes namely; glycerol (C3), tributyrin (C15) and trilaurin (C32) was used as non-carcinogenic plasticizers in poly(vinyl chloride) (PVC). The experimental results indicated that all the plasticizers play an important role of PVC toughening. Among of these plasticizers, tributyrin was the most effective for PVC plasticization due to its suitable molecular size. With the presence of tributyrin, PVC was found to tougher and softer which reflected as the increased tensile elongation at break, impact strength and the decreased tensile strength. Morphological study by scanning electron microscope (SEM) exhibited the localized plastic deformations in PVC/plasticized with 15 phr tributyrin. Dynamic mechanical analysis (DMA) showed some shifts of the glass transition temperature (Tg) for all the plasticized PVC compositions. The maximum shift was found when PVC was blended with 15 phr tributyrin. Migration test showed that the plasticizers were easily migrated in ethanol. For the migration in water, it did only slightly.

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Investigation of fatigue and mechanical properties of the pipe grade poly(vinyl chloride) using recycled scraps

Cited by 8 publications

References 16 publications

Important considerations in optimising the structural aspect of a SDOF electromagnetic vibration energy harvester

Important considerations in optimising the structural aspect of a SDOF electromagnetic vibration energy harvester

Rubber fatigue evaluation for antivibration products and an S–N curve with a scatter band of 0.8

Plasticization of Poly(Vinyl Chloride) by Non-Carcinogenic Bio-Plasticizers

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