Normal and tangential contact of layered spheres as models of joint contact

A. W. Eberhardt; J. L. Lewis; L. M. Keer

Normal and tangential contact of layered spheres as models of joint contact

A. W. Eberhardt^*, J. L. Lewis, L. M. Keer

^*Corresponding author for this work

Civil and Environmental Engineering

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Abstract

The causes of cracking in degenerating cartilage are examined using analytical models of layered elastic spheres in normal and tangential contact. Vertical surface and deep radial cracks as well as interfacial separation between cartilage and bone are observed in osteoarthritic joints. Blunt trauma experiments show vertical cracking in the underlying bone and calcified cartilage, and at the cartilage surface for higher loads. The single layer model shows that normal loading induces tensile stresses at the surface for small contact radius to layer thickness (a/h) values. Significant shear stress is predicted at the cartilage-bone interface.

Original language	English (US)
Title of host publication	Mechanics Computing in 1990's and Beyond
Editors	Hojjat Adeli, Robert L. Sierakowski
Publisher	Publ by ASCE
Pages	589-593
Number of pages	5
ISBN (Print)	0872628043
State	Published - Jan 1 1991
Event	ASCE Engineering Mechanics Specialty Conference - Columbus, OH, USA Duration: May 20 1991 → May 22 1991

Other

Other	ASCE Engineering Mechanics Specialty Conference
City	Columbus, OH, USA
Period	5/20/91 → 5/22/91

ASJC Scopus subject areas

Engineering(all)

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title = "Normal and tangential contact of layered spheres as models of joint contact",

abstract = "The causes of cracking in degenerating cartilage are examined using analytical models of layered elastic spheres in normal and tangential contact. Vertical surface and deep radial cracks as well as interfacial separation between cartilage and bone are observed in osteoarthritic joints. Blunt trauma experiments show vertical cracking in the underlying bone and calcified cartilage, and at the cartilage surface for higher loads. The single layer model shows that normal loading induces tensile stresses at the surface for small contact radius to layer thickness (a/h) values. Significant shear stress is predicted at the cartilage-bone interface.",

author = "Eberhardt, {A. W.} and Lewis, {J. L.} and Keer, {L. M.}",

year = "1991",

month = jan,

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language = "English (US)",

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pages = "589--593",

editor = "Hojjat Adeli and Sierakowski, {Robert L.}",

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note = "ASCE Engineering Mechanics Specialty Conference ; Conference date: 20-05-1991 Through 22-05-1991",

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T1 - Normal and tangential contact of layered spheres as models of joint contact

AU - Eberhardt, A. W.

AU - Lewis, J. L.

AU - Keer, L. M.

PY - 1991/1/1

Y1 - 1991/1/1

N2 - The causes of cracking in degenerating cartilage are examined using analytical models of layered elastic spheres in normal and tangential contact. Vertical surface and deep radial cracks as well as interfacial separation between cartilage and bone are observed in osteoarthritic joints. Blunt trauma experiments show vertical cracking in the underlying bone and calcified cartilage, and at the cartilage surface for higher loads. The single layer model shows that normal loading induces tensile stresses at the surface for small contact radius to layer thickness (a/h) values. Significant shear stress is predicted at the cartilage-bone interface.

AB - The causes of cracking in degenerating cartilage are examined using analytical models of layered elastic spheres in normal and tangential contact. Vertical surface and deep radial cracks as well as interfacial separation between cartilage and bone are observed in osteoarthritic joints. Blunt trauma experiments show vertical cracking in the underlying bone and calcified cartilage, and at the cartilage surface for higher loads. The single layer model shows that normal loading induces tensile stresses at the surface for small contact radius to layer thickness (a/h) values. Significant shear stress is predicted at the cartilage-bone interface.

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UR - http://www.scopus.com/inward/citedby.url?scp=0025897689&partnerID=8YFLogxK

M3 - Conference contribution

AN - SCOPUS:0025897689

SN - 0872628043

SP - 589

EP - 593

BT - Mechanics Computing in 1990's and Beyond

A2 - Adeli, Hojjat

A2 - Sierakowski, Robert L.

PB - Publ by ASCE

T2 - ASCE Engineering Mechanics Specialty Conference

Y2 - 20 May 1991 through 22 May 1991

ER -