Design of Structure Corners Restraining Tribological Failures: Part I - Development of Design Formula

• Journal title : Tribology and Lubricants
• Volume 31, Issue 4,  2015, pp.163-169
• Publisher : The Korean Society of Tribologists and Lubrication Engineers
• DOI : 10.9725/kstle.2015.31.4.163
Title & Authors
Design of Structure Corners Restraining Tribological Failures: Part I - Development of Design Formula
Kim, Hyung-Kyu;

Abstract
This paper describes a design method for the corner radius of a contacting body using the theoretical approach of contact mechanics. A complete contact, as in the case of a sharp-cornered punch, produces singular contact traction: whereas, in an incomplete contact, the singular contact traction disappears because of the rounded corners, and the contact edges are within the rounded regions. The design method aims to determine the conditions of the contact force as well as the material properties in an incomplete contact. The incomplete contact changes into the complete contact again when the contact edges exceed the rounded regions owing to either an increased contact force or the compliance of the materials. The contact length of a rounded punch is used as a parameter to derive the required conditions. As a result, a design formula is obtained, which provides a minimum allowable radius when the materials, normal contact force, and the length of a flat region of the punch are predetermined. This work consists of two parts: Part I includes a theoretical background, design method, and formula, and Part II describes the actual process with the investigation of design parameters.
Keywords
structure corner;corner radius;contact mechanics;complete contact;incomplete contact;contact length;
Language
Korean
Cited by
1.
트라이볼로지 손상을 억제하기 위한 구조물 모서리부 설계: 제2부 - 설계인자 분석 및 예,김형규;

한국윤활학회지, 2015. vol.31. 4, pp.170-176
2.
MD 시뮬레이션을 이용한 실린더 형태 나노와이어의 접촉면적에 관한 연구,김현준;

한국윤활학회지, 2016. vol.32. 1, pp.9-17
References
1.
Hills, D. A., Nowell, D., Sackfield, A., Mechanics of Elastic Contacts, Chap. 2, Butterworth-Heinemann, Oxford, UK, 1993 (ISBN 0-7506-0540-5).

2.
Dundurs, J., “Discussion of edge-bonded dissimilar orthogonal elastic wedges under normal and shear loading”, J. Appl. Mech., Vol. 36, pp. 650-652, 1969.

3.
Goodman, L. E., “Contact stress analysis of normally loaded rough spheres,” J. Appl. Mech., Vol. 29, No. 3, pp. 515-522, 1962.

4.
Nowell, D., Hills, D. A., Sackfield, A., “Contact of dissimilar elastic cylinders under normal and tangential loading”, J. Mech. Phys. Solids, Vol. 36, No. 1, pp. 59-75, 1988.

5.
Kim, H.-K., Hills, D. A., Nowell, D., “Partial slip between contacting cylinders under transverse and axial shear”, Int. J. Mech. Sci., Vol. 42, pp. 199-212, 2000.

6.
Kim, H.-K., SHEARCONTAC, Registered Program No. 2001-01-12-7084, Korea, 2001.

7.
Johnson, K. L., Contact Mechanics, Chap. 2, Cambridge University Press, Cambridge, UK, 1985 (ISBN 0-521-34796-3).

8.
Ciavarella, M., Hills, D. A., Monno, G., “The Influence of Rounded Edges on Indentation by a Flat Punch”, Proc. Instn. Mech. Engrs., Vol. 212, pp. 319-328, 1998.