PSI - Issue 5

Chmelko Vladimír et al. / Procedia Structural Integrity 5 (2017) 825–831 Chmelko, V., Margetin, M./ Structural Integrity Procedia 00 (2017) 000 – 000

830 6

 i+1

 S

G

i 

+1

i  ] s(t)

i

[

s(t)

 i+2

 n

i+1

 n

i+2

t

i 

+2

i  ] s(t)

i

[

s(t)

 i+2

 i+1

i

[ ,0]  i

Fig. 4. Principle of nominal loading process transformation step by step into root of the notch

4. The verification of proposed algorithm and conclusions

The above-mentioned computational transformation procedure was performed on a cylindrical specimen with the V shape notch of the semicircular by Fig. 5. On the specimen loaded by the random loading process by Fig. 3, was measured nominal stress by three circumferentially deployed strain gauges, as well as the stress in the root of the notch by an identical deployment of the strain gauge sensors.

Fig. 5. Comparison of the strain process measured in root of notch and the process obtained by computational transformation according the proposed method (two specimens of material C55)