Adhesion to skin

Andrews, E. H.; Khan, T. A.; Majid, H. A.

doi:10.1007/bf01113769

Cited by 31 publications

(8 citation statements)

References 17 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This superposition is illustrated in Fig. 1, which shows the regions of instability wherein an accelerating crack reaching some critical velocity, v c , will jump from 2 This is dependent on the sign of the change in fracture energy with rate, however, as opposite trends have been reported in some situations [41]. 3 This appears to be the case for the material system studied herein, as prominent stress whitened zones appeared at the crack arrest sites, while propagation during slip events resulted in rather featureless fracture surfaces.…”

Section: Stick-slip Behaviormentioning

confidence: 93%

On the Use of a Driven Wedge Test to Acquire Dynamic Fracture Energies of Bonded Beam Specimens

Dillard

Pohlit

Jacob

et al. 2011

The Journal of Adhesion

View full text Add to dashboard Cite

A driven wedge test is used to characterize the mode I fracture resistance of adhesively bonded composite beam specimens over a range of crosshead rates up to 1 m=s. The shorter moment arms (between wedge contact and crack tip) significantly reduce inertial effects and stored energy in the debonded adherends, when compared with conventional means of testing double cantilever beam (DCB) specimens. This permitted collecting an order of magnitude more crack initiation events per specimen than could be obtained with end-loaded DCB specimens bonded with an epoxy exhibiting significant stick-slip behavior. The localized contact of the wedge with the adherends limits the amount of both elastic and kinetic energy, significantly reduces crack advance during slip events, and facilitates higher resolution imaging of the fracture zone with high speed imaging. The method appears to work well under both quasi-static and high rate loading, consistently providing substantially more discrete fracture events for specimens exhibiting pronounced stick-slip failures. Deflections associated with beam transverse shear and root rotation for the shorter beams were not negligible, so simple beam theory was inadequate for obtaining qualitative fracture energies. Finite element analysis of the specimens, however, showed that fracture energies were in good agreement with values obtained from traditional DCB tests. The method holds promise for use in dynamic testing and for characterizing bonded or laminated materials exhibiting significant stick slip behavior, reducing the number of specimens required to characterize a sufficient number of fracture events.

show abstract

Section: Stick-slip Behaviormentioning

confidence: 93%

On the Use of a Driven Wedge Test to Acquire Dynamic Fracture Energies of Bonded Beam Specimens

Dillard

Pohlit

Jacob

et al. 2011

The Journal of Adhesion

View full text Add to dashboard Cite

show abstract

“…Several studies have attempted to explore the perturbation of the adhesion measurement caused by the compliance inherent in tape adhesion 12 and contact adhesion experiments, 13 however, little attention has been paid to the influence of the compliant load cell in the probe tack measurements. The current study examines the experimental and analytic considerations that apply to a model probe tack test measurement, with broader implications for other compliant tensile tests.…”

Section: Introductionmentioning

confidence: 99%

Apparatus-specific analysis of fluid adhesion measurements

Francis

Horn

2001

Journal of Applied Physics

View full text Add to dashboard Cite

A thin film of viscous liquid between two solids acts as an adhesive due to the large force resisting separation of the solids. This effect is exploited in pressure-sensitive adhesive bonds. One method of investigating such bonds is to use a probe tack test in which a rigid probe is indented into a thin adhesive layer coating a rigid flat base. These experiments are characterized by two quantities: the total work of separation, that is, the work done in extracting the rigid punch from the adhesive film, and the peak adhesive force, otherwise known as the adhesive strength. Little effort, however, has been spent on understanding the connection between these quantities and the apparatus used to measure them. In this article we shall study the simplest case of fluid adhesion where a spherical probe and flat are bound by a high viscosity Newtonian polymer melt ͑polydimethylsiloxane or polybutene͒ and examine the role of apparatus-specific parameters in determining the measured adhesive strength and work of separation. We shall show how a dimensionless master-curve can be derived to capture the dependence of the adhesive strength on the testing regime. Specific attention is paid to the effect of system compliance on the adhesion, as introduced by the presence of a compliant load cell used to measure the adhesive force. A relationship linking the adhesive strength of a Newtonian film and the work of separation is also presented.

show abstract

“…Fuller details will be found in the literature.' The experimental arrangement is shown in is obtained directly from the peel force P and the width b of the peel strip using the formula 8 = ( P / b ) (1 -cos 4 ) (1) where 4 is the peel angle and the formula assumes that the peeled portion of the strip is inextensible.…”

Section: Soft-machine Peel Testingmentioning

confidence: 99%