The FF life of the plates is approximately 60% lower than the plain fatigue life of the plates with fr.

Considering the expenditure of the material fatigue constant achieved through experiment and fatigue problem researched with finite element method,this paper has adopted high precision quadratic element to build the finite element model,has conducted singular degeneration on the crack tip and mesh detailing on part crack tip.

This paper divides labor into conventional labor and innovative labor.

This paper discusses the innovative labor from its historical evolvement, its measurement, its investment and returns, and its laborer s salary and reward by comparing it with conventional labor.

Research on Fatigue Property of Annular Specimen of ABS/SBS under Different Stress by Extrapolation Method;

Fracture Damage Behavior of Wood/Plastics Composite under Mutual Action of Fatigue and Creep;

Progressive fatigue damage analysis method of laminated composites;

It is an effective method and measure to improve the whole results of training,to delay the tiredness,promote the recov.

This paper theoretically analyzes the relations between tiredness and nutrition, also discusses the tiredness of the athletes, its prevention and the nutrition supply.