Multiaxial cycle counting method based on path-dependent line integral

doi:10.1016/j.ijfatigue.2023.108009

Multiaxial cycle counting method based on path-dependent line integral

2024-01-01

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DOI：10.1016/j.ijfatigue.2023.108009

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A multiaxial cycle counting method was proposed by path-dependent line integral (PDLI). In the proposed PDLI multiaxial cycle counting method, the length increment of loading path is assigned a positive or negative sign in the strain space, and the interval from zero to the maximum value of PDLI is defined as a half-cycle. A very concise recursive algorithm is provided to implement the proposed multiaxial cycle counting method. The experimental verification showed that the proposed multiaxal cycle counting method was used to count multi-axial cycle, which can obtain satisfactory life prediction results under multiaxial variable amplitude loading. In addition, the PDLI multiaxial cycle counting method can be reduced to a uniaxial rainflow counting form.

Keywords:

Multiaxial fatigue

Cycle counting

Path -dependent line integral

Variable amplitude loading

Life prediction

Multiaxial cycle counting method based on path-dependent line integral

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