Issue 77

V. Antonchenko et alii, Fracture and Structural Integrity, 77 (2026) 247-264; DOI: 10.3221/IGF-ESIS.77.15

଴ ଵ ଶ ଷ 0.5329 0.4321

Size, %

5

0.6823 0.6903 0.6996 0.7010 0.7060 0.6987 0.7066 0.7157 0.7165 0.7213 0.6150 0.6213 0.6256 0.6301 0.6161 0.6256 0.6319 0.6370 0.6402

0.3600 0.3456 3.3154 0.3351 0.3343 0.3640 0.3490 0.3457 0.3378 0.3372

ଵ ଶ ൗ ൌ 1

7.5

0.5244 0.5238 0.5180 0.5181 0.5426 0.5333 0.5322 0.5257 0.5258

0.4187 0.4158 0.4083 0.4076 0.4381 0.4239 0.4206 0.4127 0.4121

10

12.5

15

5

ଵ ଶ ൗ ൌ 0.7

7.5

10

12.5

15

Table 4: Shape factors for UCC with axis ratios of 0.3. Size, % ଴ ଵ ଶ 5 0.6054 0.4779

ଷ

0.3910 0.3819 0.3767 0.3728 0.3710 0.3946 0.3850 0.3795 0.3757 0.3734

0.3282 0.3183 0.3128 0.3087 0.3068 0.3305 0.3202 0.3145 0.3105 0.3082

ଵ ଶ ൗ ൌ 1

7.5

0.4731 0.4702 0.4678 0.4672 0.4839 0.4786 0.4753 0.4733 0.4718

10

12.5

15

5

ଵ ଶ ൗ ൌ 0.7

7.5

10

12.5

15

Table 5: Shape factors for UCC with axis ratios of 0.7.

Validation of the obtained coefficients To validate the obtained coefficients, several practically important cases were studied: internal pressure, temperature gradient, the combined effect of the above factors. Fig. 6 shows the stress distribution graph for the combined pressure and temperature load case. The left figure shows the stress for the case E clad /E BM =1, and the right figure shows the case E clad /E BM =0.7. The right figure shows the stress polynomial function for the base metal, with stresses separated into those in the base metal and those in the cladding.

Figure 6: Stress distribution and polynomial for combined loading: left - E clad /E BM =1; right E clad /E BM =0.7.

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