EURODYMAT 1997 - 5th International Conference on Mechanical and Physical Behaviour of Materials under Dynamic Loading

J. Phys. IV France 07 (1997) C3-295-C3-299
DOI: 10.1051/jp4:1997352

Dynamic Stress Concentration Factor in the Strip Plate with Fillet

N. Nakayama¹, M. Ohashi¹, T. Sano², S. Horikoshi³ and H. Takeishi<sup>4

1</sup>  Department of Precision Engineering, Graduate School, Chiba Institute of Technology, 2-17-1 Tudanuma, Narashino City, Chiba Prefecture 275, Japan
²  Mechanical Engineering Laboratory, A.I.S.T., M.I.T.I., 1-2 Namiki, Tsukuba City, Ibaraki Prefecture 305, Japan
³  A.E.S., 1-6-1 Takezono, Tukuba City, Ibaraki Prefecture 305, Japan
⁴  Department of Precision Engineering, Chiba Institute of Technology, 2-17-1 Tudanuma, Narashino City, Chiba Prefecture 275, Japan

Abstract
Dynamic and static stress concentration factors α_Dmax and αS generated at a fillet part are observed by photoelastic method, and the comparison between two different factors is carried out. Next, the reflection coefficient A is calculated using the height of incident and reflected waves measured by the strain gauge. As the result, following relationship α_Dmax=(1+A)αs is derived experimentally. The equation shows that the maximum dynamic stress concentration factor α_Dmaxis easily calculated using the static stress concentration factor α and the the reflection coefficient A.

Résumé
Les facteurs de concentration de contrainte dynamique α_Dmax et statique αs dans un épaulement sont observés photoélastiquement. Ensuite, le coefficient de réflexion A est calculé en utilisant les hauteurs de vagues incidentes et réfléchies mesurées par jauge à fil résistant. La relation α_Dmax=(1+A)αs est obtenue expérimentalement. Cette équation montre que le facteur dynamique de concentration de contrainte est facilement calculé en utilisant le facteur statique et le coefficient de réflexion A.

© EDP Sciences 1997