Application of Dang Van Model Based on Critical Plane Approach for Rolling Contact Problems

Area of Science:

• Mechanical Engineering
• Materials Science

Background:

• Rolling contact fatigue (RCF) analysis necessitates multiaxial fatigue criteria for complex stress states.
• The Dang Van criterion is widely used but criticized for overestimating compressive stress influence, underestimating fatigue strength.

Purpose of the Study:

• To compare modifications of the Dang Van criterion using the critical plane approach for RCF problems.
• To introduce and validate a new modification where compressive hydrostatic stresses are considered as detrimental as tensile stresses.

Main Methods:

• Comparison of modified Dang Van criteria with experimental data for out-of-phase compression and torsion.
• Validation against the Papadopoulos criterion, known for its accuracy in RCF.
• Application to a practical RCF analysis of a roller bearing.

Main Results:

• The original Dang Van criterion is unsuitable for RCF.
• Simply omitting compressive hydrostatic stresses is insufficient.
• The proposed modification, equating detrimental effects of compressive and tensile hydrostatic stresses, achieved the highest accuracy (0.77% error for experiments, 5.8% for Papadopoulos, 1.1% for roller bearing).

Conclusions:

• The proposed modification of the Dang Van criterion offers superior accuracy for rolling contact fatigue analysis.
• This enhanced criterion provides a more reliable method for predicting fatigue life under complex stress conditions in RCF scenarios.