Fatigue Life Estimation of Welded joint with different approaches usingIIW guidelines and FEA techniques MTU India Pvt, Limited

Format:

Book

Conference/Event

Author/Creator:

Wadagaonkar, Surajit Sopan, author.

Contributor:

Kale, Rohit

Schilling, Frank

Ugale, Vipul

Conference Name:

Symposium on International Automotive Technology (2021-09-29 : Pune, India)

Language:

English

Physical Description:

1 online resource cm

Place of Publication:

Warrendale, PA SAE International 2021

Summary:

Fatigue Life Estimation of Welded joint with different approaches usingIIW guidelines and FEA techniques.Surajit Wadagaonkar, Frank Schilling, Rohit Kale, Vipul UgaleThe fatigue issue of welded joints is very complex because its mechanism and manyinfluence factors are still not fully understood. Fatigue life estimation of welded jointsin engineering is mainly based on the stress state of the welded joints and the stressconcentration at the weld toe and root. Different approaches have been used for thefatigue analysis of welded joints, such as the nominal stress approach, the hot spotstress (HSS) approach, and the local notch stress approach.The nominal stress approach is relatively simple and has been adopted in manycodes. However, the form of a welded structure is generally complicated and thedetermination of a nominal stress is difficult. In addition not every weld detail isdescribed by fatigue classes in literature. It has been discovered that the fatigueprocess has a local character that cannot be comprehensively described by thenominal stresses concept. The HSS approach has been widely used in engineeringdesigns at present. This approach utilized for standard types of welded joints and it'smore popular due to simplicity in application than the nominal stress approach. On theother hand, it does not consider the local stress concentration caused by the weld toeitself and, hence, avoids the difficulty of determining the local geometry of the weldtoe, as required in the notch stress approach. The notch stress approach takes intoaccount the effect of the weld toe / root, and has been considered to be more accuratethan other approaches for fatigue life assessment. However, this approach needsdetailed modelling of the weld geometry. Notch stress approach can be applied to anytype of standard and non-standard welded joints. It does not require any classificationof welded joints based on geometry and loading.This paper recommends and suggests an appropriate finite element modellingapproach to predict the fatigue life for non-standard welded joints. In this study, a GearBox mounting bracket is analysed for operating loads. In this work a nominal stressapproach along with FEMFAT is used for evaluation of standard weld seams and notchstress approach is used for non-standard weld seams where empirical relations, weldseam database for such weld seams is not available. Because of standard and nonstandardwelds, just one approach of fatigue analysis does not give satisfactory resultsdue to its limitations of either estimation or application point of view. Notch stressapproach gives more visibility into weld seam evaluation not only from detailedgeometry perspective but also effect of surrounding indirect boundary conditions onsafety factors

Notes:

Vendor supplied data

Publisher Number:

2021-26-0339

Access Restriction:

Restricted for use by site license