In the present paper, the fatigue strength estimation capabilities of the modified C-S (Carpinteri-Spagnoli) criterion are improved by employing the Maximum Rectangular Hull (MRH) method proposed by the first author. The C–S criterion is a multiaxial high-cycle fatigue criterion based on the critical plane approach and takes into account both shear stress (Mode II) and normal stress (Mode I)mechanisms to evaluate the orientation of the critical plane. The fatigue damage parameter used is given by a nonlinear combination of the equivalent normal stress amplitude,Na,eq, and the shear stress amplitude, Ca, acting on the critical plane. In the present paper, the shear stress amplitude is evaluated through the MRH method. Some experimental data available in the literature are compared with the theoretical estimations, concluding that the multiaxial fatigue strength evaluations provided by the C–S criterion are improved when Ca is computed applying theMRHmethod instead of the Minimum Bounding Circle (MBC) method.

An alternative definition of the shear stress amplitude based on the Maximum Rectangular Hull method and application to the C-S (Carpinteri-Spagnoli) criterion / José Alexander Araújo; Andrea Carpinteri; Camilla Ronchei; Andrea Spagnoli; Sabrina Vantadori. - In: FATIGUE & FRACTURE OF ENGINEERING MATERIALS & STRUCTURES. - ISSN 8756-758X. - 37:7(2014), pp. 764-771. [10.1111/ffe.12180]

An alternative definition of the shear stress amplitude based on the Maximum Rectangular Hull method and application to the C-S (Carpinteri-Spagnoli) criterion

CARPINTERI, Andrea;RONCHEI, Camilla;SPAGNOLI, Andrea;VANTADORI, Sabrina
2014

Abstract

In the present paper, the fatigue strength estimation capabilities of the modified C-S (Carpinteri-Spagnoli) criterion are improved by employing the Maximum Rectangular Hull (MRH) method proposed by the first author. The C–S criterion is a multiaxial high-cycle fatigue criterion based on the critical plane approach and takes into account both shear stress (Mode II) and normal stress (Mode I)mechanisms to evaluate the orientation of the critical plane. The fatigue damage parameter used is given by a nonlinear combination of the equivalent normal stress amplitude,Na,eq, and the shear stress amplitude, Ca, acting on the critical plane. In the present paper, the shear stress amplitude is evaluated through the MRH method. Some experimental data available in the literature are compared with the theoretical estimations, concluding that the multiaxial fatigue strength evaluations provided by the C–S criterion are improved when Ca is computed applying theMRHmethod instead of the Minimum Bounding Circle (MBC) method.
An alternative definition of the shear stress amplitude based on the Maximum Rectangular Hull method and application to the C-S (Carpinteri-Spagnoli) criterion / José Alexander Araújo; Andrea Carpinteri; Camilla Ronchei; Andrea Spagnoli; Sabrina Vantadori. - In: FATIGUE & FRACTURE OF ENGINEERING MATERIALS & STRUCTURES. - ISSN 8756-758X. - 37:7(2014), pp. 764-771. [10.1111/ffe.12180]
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/11381/2743302
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