An evaluation of friction and impact induced acoustic behaviour of selected automotive materials, Part II: impact induced acoustics

Trapp, Martin; Hodgdon, Kathleen K.

doi:10.1504/ijvnv.2008.020109

Cited by 7 publications

(4 citation statements)

References 41 publications

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“…[43,57] Although the tensile performance is decreasing, the increasing trend of IZOD impact resistance of the ESM/PP composite can be well considered to utilize especially in automotive industries for reducing the squeak noise. [58][59][60] With increase of impact resistance performance of the composite with increasing the ESM content, because of enhanced capability of absorbing the impact, the impact-induced noises for example, squeak is supposed to be reduced if the ESM/PP composite is used in the automobile. Figure 5a-c represent the comparative TGA curves of the ESM/PP composites containing ESM of different sizes.…”

Section: Resultsmentioning

confidence: 99%

Eggshell membrane reinforced polypropylene biocomposite and its tactile assessment

Sinha

Lee

et al. 2020

J of Applied Polymer Sci

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Considering the better tactile performance (pleasantness) of different materials for example, leather, fur, feather, and so on, which are known to be the tribopositive materials, herein, the tribo‐positive eggshell membrane (ESM) powders derived from waste eggshell were melt‐mixed with polypropylene (PP) to prepare a low‐cost ESM/PP biocomposite of enhanced tactile property. In this regard, in‐plane coefficient of friction (COF) has been examined and found a decreasing trend with increasing the ESM content which may consider towards improving the pleasantness of the composite, and which is due to the increase of surface smoothness and adhesion property laid by incorporation of polar ESM within the nonpolar PP matrix. However, the decrease of COF was not spontaneous. Alternatively, the increase of tribopositive character of the composite due to addition of tribopositive ESM within the tribonegative PP, as investigated by fabricating a single electrode triboelectric nanogenerator (STENG)‐like device made of the ESM/PP composite may be considered potential to realize the enhancement of touch‐feeling performance. The triboelectric results showed well‐correlation not only with the COF, but also with the thermal and mechanical properties of the composite. It is thus, prejudiced that triboelectric investigation can be used as a potential tool to realize/manage the touch‐feeling properties of different products.

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Section: Resultsmentioning

confidence: 99%

Eggshell membrane reinforced polypropylene biocomposite and its tactile assessment

Sinha

Lee

et al. 2020

J of Applied Polymer Sci

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“…While squeak is an unexpected noise due to sliding‐induced frictional instabilities, rattle is another type of noise caused by the impact/contact between the two materials. Impact of two materials produces in‐plane vibration that couple with out‐of‐plane modes that can be heard as noise . Trapp et al .…”

Section: Introductionmentioning

confidence: 99%

“…They reported that the surface roughness may be responsible for this frictional sounds. In another study, they investigated impact‐induced noise of various materials (mainly the PA and PP) and observed that the rattle increases with increasing the hardness and decreasing the Izod impact strength. Accordingly, it can be said that the S & R are highly related to the friction characteristics and the impact strength of the materials.…”

Section: Introductionmentioning

confidence: 99%

Ultra‐high‐molecular‐weight polyethylene reinforced polypropylene and polyamide composites toward developing low‐noise automobile interior

Sinha

Choi²,

2019

J of Applied Polymer Sci

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Circular ultra‐high‐molecular‐weight polyethylene (UHMWPE) of 60 and 140 μm particle size, to ensure the homogenous mixing, was used as filler materials for developing the polypropylene (PP) and polyamide 6 (PA6)‐based composite specimens to investigate the effect of UHMWPE on reducing the noise, if the composites are used in car interior. PP composite containing 5 wt % UHMWPE of 60 μm particle size showed the lowest in‐plane friction coefficient (0.18 ± 0.01), improved Izod impact strength (33 ± 2.9 J/m2), and considerable tensile properties (37 ± 1.5 MPa of strength and 21 ± 1.1% of elongation at break), indicating its promise as low‐noise and durable material to be used in the car interior. Although PA6 composites showed decreasing friction coefficients with increasing UHMWPE content, their tensile and impact properties became poor or inconsistent, maybe due to the incompatibility of nonpolar UHMWPE with polar PA, and the large difference of their melting temperatures. The extent of compatibility of PP and PA6 with the UHMWPE has been investigated by analyzing the morphology (using scanning electron microscope) and the thermal properties of the composites. © 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2020, 137, 48720.

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“…Acoustic comfort is an important sales point, in particular in car industry [1]. For many years, the research efforts allowed reduction of acoustic levels, in particular those related to interior sources like the engine-related noise and to exterior sources as tire and wind-related noises [2].…”

Section: Introductionmentioning

confidence: 99%

Influence of Multiharmonics Excitation on Rattle Noise in Automotive Gearboxes

Kadmiri

Perret-Liaudet

Rigaud

et al. 2011

Advances in Acoustics and Vibration

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We consider the automotive gearbox rattle noise resulting from vibro-impacts that can occur between the idle gears under excessive velocity fluctuations of the shaft-driving gears imposed by engine torque fluctuation. Even if the rattling phenomenon has no consequence on reliability, it may be particularly annoying for vehicle interior sound quality and acoustic comfort. The main parameters governing such kind of vibrations are the excitation source associated with engine torque fluctuation which can be modeled by an imposed displacement of the driveline, the inertia of the idle gear, the drag torque acting during the free flight motion, and the impact laws. In the case of rattle, it is reasonable to assume that duration of impacts between teeth is very short compared to the excitation period. Then, these impacts are modeled by a coefficient of restitution law. The excitation source is not composed only with fundamental component but also with other harmonic components. This study presents some effects of these additional components on the dynamic response of the idle gear.

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An evaluation of friction and impact induced acoustic behaviour of selected automotive materials, Part II: impact induced acoustics

Cited by 7 publications

References 41 publications

Eggshell membrane reinforced polypropylene biocomposite and its tactile assessment

Eggshell membrane reinforced polypropylene biocomposite and its tactile assessment

Ultra‐high‐molecular‐weight polyethylene reinforced polypropylene and polyamide composites toward developing low‐noise automobile interior

Influence of Multiharmonics Excitation on Rattle Noise in Automotive Gearboxes

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