4.5.1 Introduction 过程设备设计 4.5 Fatigue Analysis 4.5.1 Introduction Causes for the increase of fatigue failure of pressure vessels: I (1) Increase of fatigue loadings; (2) Use of high strength materials Characteristics of fatigue failure: (1) No obvious plastic deformation; (2) Low stress level )Originating from the high stressed zone4 4.5.1 Introduction
 4.5 Fatigue Analysis 4.5.1 Introduction Causes for the increase of fatigue failure of pressure vessels: (1) Increase of fatigue loadings; (2) Use of high strength materials Characteristics of fatigue failure: (1) No obvious plastic deformation; (2) Low stress level; (3) Originating from the high stressed zone