110- مقاله انگلیسی- Continuum Damage Mechanics for hysteresis and fatigue
مقاله انگلیسی- Continuum Damage Mechanics for hysteresis and fatigue
شماره فایل : 110
Continuum Damage Mechanics for hysteresis and fatigue of quasi-brittle materials and structures
SUMMARY:
For material exhibiting hysteresis such as quasi-brittle materials, it is natural to consider that hysteresis and fatigue are related to each other. One shows in the present work that damage, from the Continuum Damage Mechanics point of view, may be seen as the link between both phenomenon. One attempts hence to set up a unified modeling of hysteresis and damage. Numerical examples are given for concrete and validate the proposed model of internal sliding and friction coupled with damage. The problem of a proper phenomenological modeling of the micro-defects closure effect leading to a dissymetric tension/compression response and to stiffness recovery in compression is also adressed. Cyclic and fatigue applications are in mind but also random fatigue and seismic responses.
key words: damage, fatigue, hysteresis, concrete, unilateral conditions