Issue 59

A. Houari et alii, Frattura ed Integrità Strutturale, 59 (2022) 212-231; DOI: 10.3221/IGF-ESIS.59.16

Because of these numerous advantages, the typical gradation of FGMs in tubular systems is widely used; it becomes important to study their behavior elasto-plastic in the presence of defects under internal pressure. These defects by their location, combine both effects the location itself and the gradation of FGM; hence, the main problem in our work is to identify the effect of default in different cases. Our study is conducted by three locations following the thickness (Fig.5). The quality defect is a void which always remains trapped in the thickness. This numerical computation modality gave us the reliable advantage of creating defects in complex geometrical and loading situations without having a problem of convergence.

Plan A-A

Figure 5: Details of the mesh around the cavity.

Figure 6: Presentation of the algorithm for the integration of stresses in the FGM (UMAT and HARD).

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