Analysis of an unsteadily propagating crack under mode I and II loading |
| |
Authors: | Kwang Ho Lee Gap Su Ban |
| |
Affiliation: | (1) Department of Automotive Engineering, Sangju National University, 742-711 Kyungbuk, Korea |
| |
Abstract: | Stress and displacement fields for an unsteadily propagating crack under mode I and II loading are developed through an asymptotic
analysis. Dynamic equilibrium equations for the unsteady state are developed and the solution to the displacement fields and
the stress fields for a crack propagating with high crack tip acceleration, deceleration and rapidly varying stress intensity
factor. The influence of transients on the higher order terms of the stress fields are explicitly revealed. Using these stress
components, isochromatic fringes around the propagating crack are generated for different crack speeds, crack tip accelerations
and the time rate of change of stress intensity factor, and the effects of the transients on these fringes are discussed.
The effects of the transients on the dynamic stress intensity factor are discussed when a crack propagates with high acceleration
and deceleration. The effect of transient on the time rate of change of dynamic stress intensity factor below Rayleigh wave
speed in an infinite body is also studied. |
| |
Keywords: | Unsteady crack propagation Dynamic stress intensity factor Stress and displacement fields Isochromatic fringes Acceleration and deceleration crack Time rate of change of dynamic stress intensity factor |
本文献已被 SpringerLink 等数据库收录! |
|