PSI - Issue 81

Dhanies Wahyu Ardyrizky et al. / Procedia Structural Integrity 81 (2026) 458–464

460

applied to prevent shear stress separation between the core and plates. Both the face plates and the core were modeled using shell elements to simplify the Abaqus CAE model and analysis.

Table 1. Material properties of AH32 steel Yield strength (MPa) Elastic modulus (GPa)

Poisson’s ratio (-)

Density (kg/m 3 )

Specific heat capacity (J/kg K)

Thermal conductivity (W/m K)

Coefficient of thermal expansion (10 -5 )

315

215

0.3

7850

465

52

13.2

(b)

(a)

Fig. 1. Sandwich panel geometry model (a) detail geometry of core (Klanac et al); and (b) overall dimensions of the sandwich panel.

(a)

(b)

Fig. 2. Temperature dependence of material behavior: (a) yield strength variations with temperature (Nurcholis et al., 2023); and (b) temperature-dependent stress – strain behavior (Nurcholis et al., 2023).

The material used in this research is AH32 steel, a carbon steel commonly used as the primary material for ship structures. Its mechanical properties are listed in Table 1. At the same time, the temperature-dependent material strength behavior is illustrated in Fig. 2. The reduction in yield strength with increasing temperature is evident in Fig. 2(a). At the same time, Fig. 2(b) shows a decrease in the slope of the stress – strain curve and the yield point, indicating material softening and reduced stiffness at elevated temperatures.

Fig. 3. Thermal loading scenario.

The applied loading combined both mechanical and thermal components. A dead load of 4250 N/m was converted into a total force of 23587.5 N and subsequently distributed over the surface of the sandwich panel to represent an equivalent surface load. For thermal loading, a transient thermal load was applied on the top plate surface, accounting for both convection and radiation