On the Errors Induced by the Hookean Modeling of Nominal Stresses in the eN Method Mechanical Engineering Department Pontifical Catholic University of Rio de Janeiro (PUC-Rio)

Format:

Conference/Event

Author/Creator:

Meggiolaro, Marco Antonio, author.

Conference Name:

SAE Brasil International Conference on Fatigue (2001-12-12 : Sao Paulo, Brazil)

Language:

English

Physical Description:

1 online resource

Place of Publication:

Warrendale, PA SAE International 2001

Summary:

The traditional εN procedures are inconsistent when modeling nominal stresses by Hooke's law and the stresses and strains at the critical notch root by Ramberg-Osgood's equation, since the material is the same at both regions. When the nominal stresses are not substantially smaller than the yielding strength SY, the predicted hysteresis loops at the notch root can be significantly non-conservative. In fact, when the nominal stresses are in the order of SY, the Hookean model can predict stresses and strains at the notch root that are smaller than the nominal ones, a clear non-sense. To avoid this problem, it is mandatory to use Ramberg-Osgood to model both the nominal and the critical stresses and strains. However, this approach is not trivial to implement, especially when complex loads are involved. In this work, the methodology required to warrant correct numerical predictions of the critical loops under high nominal loads are discussed

Notes:

Vendor supplied data

Publisher Number:

2001-01-4067

Access Restriction:

Restricted for use by site license