Oscillating viscoelastic periodic contacts: A numerical approach

Putignano, Carmine

doi:10.1016/j.ijmecsci.2021.106663

Cited by 17 publications

(5 citation statements)

References 53 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…indentation compared to what would happen for a non-timedependent rheology: indeed, both in the full-size graph and in the zoom frames, we observe that, when a region is locally indented, once the contact has been released, the viscoelastic substrate keeps on showing there the shape assumed during the indentation. This memory effect is typical for a viscoelastic contact [49] and, crucially, is preserved also at the rough scales during the indentation cycle: as we will later see, this is intrinsically related to the work hysteretically dissipated in the indentation cycle. To this extent, in Fig.…”

Section: Resultsmentioning

confidence: 67%

See 2 more Smart Citations

On the Role of Roughness in the Indentation of Viscoelastic Solids

Putignano

Carbone

2022

Tribol Lett

View full text Add to dashboard Cite

A numerical boundary element methodology is employed to understand how fractality intervenes when a 1D rigid rough profile indents a linear viscoelastic half-plane. The focus is, in particular, on the viscoelastic dissipation and how this is influenced by the profile statistical parameters, namely, the mean square roughness $$h_{\rm rms}$$ h rms of the profile, the mean square slope $$m_{2}$$ m 2 and the Hurst exponent H. Our numerical investigation, properly supported by a dimensional analysis, reveals that, in the one-dimensional case under investigation, the leading role is played by $$h_{\rm rms}$$ h rms and, thus, mainly by the large scales of the rough spectrum. Clearly, on an experimental level, this implies that a simple measure of the roughness parameter $$h_{\rm rms}$$ h rms is sufficient to determine the viscoelastic dissipation.

show abstract

Section: Resultsmentioning

confidence: 67%

“…As suggested in Ref. [49], to approach Eq. ( 4), it is necessary to further develop the Green's term G(x) .…”

Section: Methodologiesmentioning

confidence: 99%

See 1 more Smart Citation

On the Role of Roughness in the Indentation of Viscoelastic Solids

Putignano

Carbone

2022

Tribol Lett

View full text Add to dashboard Cite

show abstract

“…Eccentricity induces a radial reciprocating motion at the lip of the seal, subjecting the lip to alternating loads and periodic contact with the shaft surface. Putignano (2021) conducted a numerical study on the issue of periodic contact of material surfaces during motion. Their work emphasized that the viscoelastic behavior of soft materials in such a state is significant and should not be overlooked.…”

Section: Introductionmentioning

confidence: 99%

The lip motion trajectory of eccentric oil seal considering material viscoelasticity

Zhai,

Li,

Xing

2023

ILT

View full text Add to dashboard Cite

Purpose This paper aims to study the motion trajectory of the oil seal for shaft in eccentric state and derive equation of lip motion trajectory. Design/methodology/approach This paper analyzes the force during the motion of the eccentric lip by considering the material viscoelasticity, and a cam-plate mechanism is established as an equivalent model for the motion between the shaft and the lip; according to this, the equation of lip motion trajectory is derived. Findings The trajectory of the lip lags that of the shaft in the eccentric state because the viscoelasticity-affected lip recovery velocity is lower than the shaft recovery speed. The lip trajectory enters the lag phase earlier and the lag phase’s duration is longer with the increase of the eccentricity and rotational speed, because the deviation of the recovery velocities between the lip and the shaft will be exacerbated. Originality/value Innovatively, by considering the viscoelasticity of the material, the cam-plate mechanism is used to equivalent the motion of the shaft-lip to derive the equation for the radial motion trajectory of the eccentric lip. The regularity of lip motion is the key to determining the performance of oil seals, and the eccentric lip trajectory research method revealed in this paper provides a research basis for the performance research and optimization of eccentric oil seals. Peer review The peer review history for this article is available at: https://publons.com/publon/10.1108/ILT-06-2023-0161/

show abstract

“…Within this context, this work is aimed towards the characterization of material pairs able to provide high static frictional resistance and low wear, under both quasistatic and fast-transient contact loading solicitations, under dry contact conditions. In fact, reinforced polymers are useful for several tribological applications where the loading can be either quasistatic (sliders, joints, clips, and switches) or oscillating [23,24] with fast variations of both normal and tangential contact solicitations (gear teeth, pillars [25][26][27], brake groan noise [28], stick-slip microdrives [29], acoustic motors, cams, and joints under fretting solicitations). When considering fast-transient variation of the contact status, the frictional resistance of polymeric materials can be affected as well by the time intercurred between successive sticking, sliding, or detachment phases [30,31], affecting the time for the establishment of adhesive joints between asperities at the interface.…”

Section: Introductionmentioning

confidence: 99%

Frictional Response of Reinforced Polymers under Quasistatic and Fast-Transient Dry Contact Conditions

et al. 2023

View full text Add to dashboard Cite

Reinforced polymers have recently gained interest because of their high stiffness associated with the classical features and cost-effectiveness of polymers. A further characteristic, suitable for several applications, is the possibility to provide high frictional and wear resistance. The frictional response of commercially available reinforced materials was here investigated in a wide range of contact boundary conditions. Experimental tests were performed on different test benches, to investigate the material frictional response under either quasistatic or fast-dynamic contact solicitations. While carbon-fiber-reinforced material exhibits a stable but low friction coefficient, the glass-fiber-reinforced material leads to the suitable combination of high friction and low wear. The PPS material, 40% (wt) glass-reinforced polymer, sliding against the Ti6Al4V titanium alloy, provided high static friction coefficients (>0.4). The same material pair was then tested in endurance under fast-dynamic contact solicitations, highlighting their resistance to wear.

show abstract

Oscillating viscoelastic periodic contacts: A numerical approach

Cited by 17 publications

References 53 publications

On the Role of Roughness in the Indentation of Viscoelastic Solids

On the Role of Roughness in the Indentation of Viscoelastic Solids

The lip motion trajectory of eccentric oil seal considering material viscoelasticity

Frictional Response of Reinforced Polymers under Quasistatic and Fast-Transient Dry Contact Conditions

Contact Info

Product

Resources

About