PSI - Issue 42

Sebastian Henschel et al. / Procedia Structural Integrity 42 (2022) 110–117 S. Henschel and L. Kru¨ger / Procedia Structural Integrity 00 (2019) 000–000

117

8

Table 2. Summary of similarities and di ff erences of di ff erent calibration methods. Method bars apart (2 × ) bars together

proposed method

Assumptions

momentum conservation

none

Input Setup

SG voltages, striker velocity, wave speed

SG voltages, displacements bars are not rearranged

rearrange bars 2 × rectangular (with plateau) expected vs. measured strains separate, without specimen

Pulse shape

any shape

calculated vs. measured displacements

Calibration

during actual test possible

Eqs. 1, 4

Eq. 6

Eqs. 10, 11

K ε, I U I , ε R = K ε, I U R

ε I = K 1 U I , ε R = K 1 U R

ε I =

Calculation

ε ′ T = K ε, T U T

ε T = K σ ε ′ T

ε T = K 2 U T

Acknowledgment

The authors thank the German Research Foundation (DFG) for the financial support in the subproject C05 of the Collaborative Research Center 920 – Project-ID 169148856.

References

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