Fatigue of shaft flange bolted joints under preload force and dynamic response

The bolted joints are used for flange connections which are subjected to preload forces and dynamic loads. This combination of static and dynamic loads in threaded joints result with complex interaction of high mean stresses, high notch effect, thread flanks contact forces and moments, and contact surfaces slippage which leads to fatigue damage. The Multi-body system dynamic model of shaft was used for assessment of dynamic behavior. Finite element model of shaft flange connection, with detailed thread joints made of heat treatable steel 30CrNiMo8 under preload condition and nonlinear thread flanks contact, was created. The Rainflow cycle counting was used as a cycle count method for describing the load cycle with local stress-strain hysteresis loop. Influences of mean stresses, bolt diameter, and stress gradients were taken into account according to FKM guidelines. The most critical fatigue locations were obtained at thread roots.

[1]  A. J. Mcevily.  Atlas of Stress Corrosion and Corrosion Fatigue Curves , 1990 .

[2]  Khlefa A. Esaklul,et al.  Prevention of failures of high strength fasteners in use in offshore and subsea applications , 2009 .

[3]  Amir Reza Shahani,et al.  Contact stress analysis and calculation of stress concentration factors at the tool joint of a drill pipe , 2009 .

[4]  F. Morel,et al.  Comparison between defects and micro-notches in multiaxial fatigue – The size effect and the gradient effect , 2009 .

[5]  D. Kozak,et al.  Influence of stress gradients on bolted joint fatigue behaviour under different preloads and cyclic loads ratio , 2014 .

[6]  D. L. McDiarmid,et al.  A SHEAR STRESS BASED CRITICAL‐PLANE CRITERION OF MULTIAXIAL FATIGUE FAILURE FOR DESIGN AND LIFE PREDICTION , 1994 .

[7]  Luca Susmel,et al.  A stress‐based method to predict lifetime under multiaxial fatigue loadings , 2003 .

[8]  Feargal Brennan,et al.  Fatigue Analysis of Drillstring Threaded Connections , 2003 .

[9]  Vassilis P. Panoskaltsis,et al.  INVARIANT FORMULATION OF A GRADIENT DEPENDENT MULTIAXIAL HIGH-CYCLE FATIGUE CRITERION , 1996 .

[10]  Wei Duan,et al.  Failure analysis of threaded connections in large-scale steel tie rods , 2011 .

[11]  Gholam Hossein Farrahi,et al.  Experimental evaluation of the effect of thread pitch on fatigue life of bolts , 2005 .

[12]  Hoon Chang,et al.  Dependence of fatigue limit of high-tension bolts on mean stress and ultimate tensile strength , 2009 .

[13]  Alain Daidié,et al.  Determining the life cycle of bolts using a local approach and the Dang Van criterion , 2006 .

[14]  B Kenny,et al.  A modification to the theory for the load distribution in conventional nuts and bolts , 1986 .

[15]  Christina Berger,et al.  Örtliche Bewertung der Schwingfestigkeit von Gewindeverbindungen. –Fatigue analysis of threaded connections using the local strain approach , 2010 .

[16]  Yan-Shin Shih,et al.  A study of the helical effect on the thread connection by three dimensional finite element analysis , 1999 .

[17]  Re Link,et al.  An Introduction to the Design and Behavior of Bolted Joints , 1991 .

[18]  Jinxiang Liu,et al.  Applicability of damage models for failure analysis of threaded bolts , 2011 .

[19]  Dario Croccolo,et al.  A contribution to the selection and calculation of screws in high duty bolted joints , 2012 .

[20]  Luca Susmel,et al.  Estimating fatigue damage under variable amplitude multiaxial fatigue loading , 2011 .