PSI - Issue 64

Hamid Dahaghin et al. / Procedia Structural Integrity 64 (2024) 1192–1199 Author name / Structural Integrity Procedia 00 (2019) 000 – 000

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Fig. 4(a) shows the temperature distribution of the strengthened plate at the end of the deposition of the last layer (before cooling). Fig. 4(b) and 4(c) illustrate the temperature history at point A (a point in the plate) and point B (a point in the last layer), as shown in Fig. 4(a).

. B

A .

2 mm

Deposition direction

Deposited WAAM

Steel plate

(a)

(b) (c) Fig. 4. (a) Temperature distribution at the end of layer deposition (in degree delicious); (b) Temperature history for point A (2 mm away from the interface of the plate and deposited WAAM); (c) Temperature history for point B The mechanical model employed the same mesh as the thermal model, but the element types were adjusted to C3D8R for the mechanical analysis. Fig. 5 presents the longitudinal RS distribution for the steel plate repaired with deposited WAAM after the clamps were removed. As shown in Fig. 5, tensile RS were generated in deposited WAAM while compressive RS were generated in the plate.

Deposition direction

A

A-A Compressive RS

A

Fig. 5. Longitudinal RS for the steel plate repaired with deposited WAAM (in Pa)

Fig. 6 displays the stress distribution under external loading for the reference plate (without strengthening), including the crack opening under maximum applied load. In contrast, Fig. 7 shows the stress distribution in the plate after the application of WAAM deposition. As illustrated in Fig. 7(a), compressive stress is generated around the crack