PSI - Issue 80

Miroslav Hrstka et al. / Procedia Structural Integrity 80 (2026) 471–492 M. Hrstka et al./ Structural Integrity Procedia 00 (2025) 000 – 000

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piezoelectric layer was clamped in the normal direction on the right side and normal load of σ 2 appl = 20 MPa was prescribed. Temperature change ΔT = –160 °C was considered in order to induce initial thermal strains due to the cooling from poling temperature to the room temperature. The deformed shape and displacements are shown in Fig. 4.

Fig. 2. The exponent δ dependence on the notch angle ω 1 of the PZT-5H/SiO 2 bi-material notch. The poling direction of the material 2 is α 1 = 90° .

Fig 3. Geometry, boundary conditions, loading and the finite element mesh of the studies interface crack.

Fig. 4. Displacements (scaled by factor 250) of the FEM model loaded by σ 2

appl = 20 MPa and ΔT = –160 °C.