چکیده مقاله
A probabilistic analysis of the fatigue crack growth for estimation of reliability degradation on the critical mechanical component of high speed machine tools is presented on the basis of fracture mechanics and theory of random process The loading is postulated to be stationary, narrow band random Gaussian process and consequently, randomized Paris Erdogan law is applicable As a mechanical model that is representative of critical component of the machine, a thin plate having a central crack is analyzed by two analytical methods “stochastic averaging SA ” and “linear fatigue damage accumulation LFDA ’’ The aforementioned plate is being analyzed by probabilistic finite element method PFEM on the basis of Monte Carlo simulation It is shown that SA method presents the most conservative results for brittle materials comparing with FEM and LFDA We also show the more reliable component of machine tools degrades very fast in uncontrolled environmental and operating conditions
کلیدواژهها
نویسندگان
M Aslanimanesh
PhD Student; Reliability Engineering specialist in Aerospace Faculty, Malek Ashtar University of Technology Tehran
شیوه ارجاع
Aslanimanesh, M,1384,Estimation of Catastrophic Failure in Brittle Mechanical Components of Machine Tools,01st Tehran International Congress on Manufacturing Engineering (TICME2005),Tehran
ارائهشده در
مجموعه مقالات اولین کنفرانس بین المللی و هفتمین کنفرانس ملی مهندسی ساخت و تولید1 فروردین 1384 · تهران