Finite element simulations of static and sliding contact between a human fingertip and textured surfaces

Shao, Fei; Childs, T.H.C.; Barnes, Cathy; Henson, Brian

doi:10.1016/j.triboint.2010.08.003

Cited by 55 publications

(50 citation statements)

References 25 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This concept of neuromechanical coupling has since been adopted by a number of researchers using more complex finite-element models of the finger pad, e.g. Maeno et al [43] and Shao et al [44] or closed-form solutions [45]. Such work should lead to a more quantitative understanding of tactile perception and grip function based on the principles of contact mechanics and the critical neurophysiological factors.…”

Section: Introductionmentioning

confidence: 99%

Finger pad friction and its role in grip and touch

Adams

Johnson

Lefèvre

et al. 2013

J. R. Soc. Interface.

224

201

View full text Add to dashboard Cite

Many aspects of both grip function and tactile perception depend on complex frictional interactions occurring in the contact zone of the finger pad, which is the subject of the current review. While it is well established that friction plays a crucial role in grip function, its exact contribution for discriminatory touch involving the sliding of a finger pad is more elusive. For texture discrimination, it is clear that vibrotaction plays an important role in the discriminatory mechanisms. Among other factors, friction impacts the nature of the vibrations generated by the relative movement of the fingertip skin against a probed object. Friction also has a major influence on the perceived tactile pleasantness of a surface. The contact mechanics of a finger pad is governed by the fingerprint ridges and the sweat that is exuded from pores located on these ridges. Counterintuitively, the coefficient of friction can increase by an order of magnitude in a period of tens of seconds when in contact with an impermeably smooth surface, such as glass. In contrast, the value will decrease for a porous surface, such as paper. The increase in friction is attributed to an occlusion mechanism and can be described by first-order kinetics. Surprisingly, the sensitivity of the coefficient of friction to the normal load and sliding velocity is comparatively of second order, yet these dependencies provide the main basis of theoretical models which, to-date, largely ignore the time evolution of the frictional dynamics. One well-known effect on taction is the possibility of inducing stick -slip if the friction decreases with increasing sliding velocity. Moreover, the initial slip of a finger pad occurs by the propagation of an annulus of failure from the perimeter of the contact zone and this phenomenon could be important in tactile perception and grip function.

show abstract

Section: Introductionmentioning

confidence: 99%

Finger pad friction and its role in grip and touch

Adams

Johnson

Lefèvre

et al. 2013

J. R. Soc. Interface.

224

201

View full text Add to dashboard Cite

show abstract

“…[25] Others FE model have also been developed in order to study the interaction of the hand, more specially the fingertip, with objects. [26][27][28][29][30][31] Finally, many FE models have been developed in different context and for different type of loading. Many have been developed in the context of loading transmission into the wrist, or in order to investigate the behavior of a bone after its fracture fixation, or also to investigate vibration's transmission.…”

Section: Introductionmentioning

confidence: 99%

A first step in finite-element simulation of a grasping task

Chamoret

Bodo

Roth

2016

Computer Assisted Surgery

View full text Add to dashboard Cite

This paper investigates a biomechanical aspect of human hand during grasping, using the finiteelement method. A realistic three-dimensional finite-element (FE) model of a human hand is developed, including wrist bones, phalanges, soft tissues and skin, reconstructed from medical computed tomography (CT) scan images. Material laws of the literature have been implemented in the model, in order to be able to simulate a simple activity of grasping. In a human design context, this model allows an interesting biomechanical study, which simulates the grasping task in a biofidelic manner. This model is a first step in the modeling of the human hand that can lead to future studies dealing with the interaction of the hand with its environment for the improvement of safety requirements of future products development.

show abstract

“…From the analytical approach, the pillar (Z003) also showed lower values of COF compared to the other samples, which was consistent with the experimental results. Table 2 Table 3 Parameters from literature were used to calculate the pressure ratios and COF of textured samples [6,14,28,33] Furthermore, the influence of orientation effect was insignificant for pillar (Z003) textures due to the geometrical advantage. However, the sliding directions affected other samples, especially the perpendicular sliding for the grooved channel (Z001) and stochastic surface (Z000).…”

Section: Discussionmentioning

confidence: 99%

“…(8) with the reported values of the Young's modulus and the Poisson ratios of skin and stainless steel ( [6,14,28,33]; refer to Table 3). The radius of fingertip in contact was measured to be 8 mm.…”

Section: The Geometric Effect Of the Contact Areamentioning

confidence: 99%

Texture Design for Reducing Tactile Friction Independent of Sliding Orientation on Stainless Steel Sheet

et al. 2017

View full text Add to dashboard Cite

Surface texture is important for contact mechanical and tribological phenomena such as the contact area and friction. In this research, three different types of geometrical microstructures were designed and fabricated by pulsed laser surface texturing as semi-symmetric (grooved channel), asymmetric fractal (Hilbert curve), and symmetric patterns (grid). A conventionally finished surface as a reference sample from the same stainless steel sheet material was compared. From the experimental approach, a multiaxis force/torque transducer was used to investigate the functionality of surface texture based on measuring the tactile friction in three different sliding directions: perpendicular, parallel, and 45°to the textures. According to the dynamic friction measurements, the grid texture was indeed orientation independent. The other samples showed orientation-dependent frictional behavior, especially the grooved channel texture and reference sample. Furthermore, an analytical approach was applied to estimate the values of the friction coefficient by the pressure distribution method. From both the experimental and analytical approaches, the grid pattern was validated to be the optimal texture design in the concern of friction reduction and orientation-independent behavior.

show abstract

Finite element simulations of static and sliding contact between a human fingertip and textured surfaces

Cited by 55 publications

References 25 publications

Finger pad friction and its role in grip and touch

Finger pad friction and its role in grip and touch

A first step in finite-element simulation of a grasping task

Texture Design for Reducing Tactile Friction Independent of Sliding Orientation on Stainless Steel Sheet

Contact Info

Product

Resources

About