## 2 Material Properties and Calculation Model
### Structure and Finite Element Models of a Composite Reinforced Panel  
The size of the composite reinforced panel is 500 \(\times\) 250 mm, with the height and width of the T stripper 38 and 50 mm, respectively. The reinforced core is filled with a mixture of fiber and resin, an adhesive of J-I16B-80.15 is used to glue the benchmark skin and T stripper. The cross-section is shown in Figure 1, 24 layers of which are in the benchmark skin and the thickness of each layer is 0.15 mm, with a total thickness 3.6 mm and stacking sequence \([45^{\circ}/0^{\circ}/-45^{\circ}/90^{\circ}/-45^{\circ}/0^{\circ}/45^{\circ}/0 ^{\circ}/45^{\circ}/90^{\circ}/-45^{\circ}/0^{\circ}]\)s. Stacking sequence of the left side in the T stripper is \([45^{\circ}/0^{\circ}/-45^{\circ}/0^{\circ}/90^{\circ}/0^{\circ}/-45^{\circ}/ 0^{\circ}/90^{\circ}/0^{\circ}/45^{\circ}/0^{\circ}]\) and the right side is \([-45^{\circ}/0^{\circ}/45^{\circ}/0^{\circ}/90^{\circ}/0^{\circ}/45^{\circ}/0 ^{\circ}/90^{\circ}/0^{\circ}/-45^{\circ}/0^{\circ}]\), with a thickness of 1.8 mm, respectively. Stacking sequence of the bottom layer in the T stripper is \([45^{\circ}/0^{\circ}]\), with a thickness of 0.3 mm. Stacking sequences in each component of the composite reinforced panel are given in Table 5. \begin{table}
\begin{tabular}{c c c c c} \hline \hline \multirow{2}{*}{**Temperature/\({}^{\circ}\)C**} & \multicolumn{3}{c}{**Thermal Conductivity/W\(\cdot\)m\({}^{-1}\)\({}^{,\circ}\)C\({}^{-1}\)**} & \multirow{2}{*}{**Specific**} \\ \cline{2-2} \cline{4-4}  & **Longitudinal** & **Transverse** & **Thickness** \\ \hline
25 & 11.8 & 0.609 & 1065 & \\
330 & 6.02 & 0.31 & 2050 & \\
360 & 5.46 & 0.28 & 4250 & \\
500 & 2.8 & 0.14 & 4200 & \\
525 & 2.33 & 0.12 & 1800 & \\
815 & 1.4 & 0.072 & 1850 & \\
3316 & 1.4 & 0.072 & 2300 & \\ \hline \hline \end{tabular}
\end{table} 
Table 4: Thermal conductivity, specific heat, and density of IM600/133 composite material [29; 30]. \begin{table}
\begin{tabular}{c c c} \hline \hline \multirow{2}{*}{**Temperature/\({}^{\circ}\)C**} & \multicolumn{3}{c}{**Electric Resistances/\(\Omega\)-m**} \\ \cline{2-3}  & **Longitudinal** & **Transverse** & **Thickness** \\ \hline
27 & 6.224 \(\times\) 10\({}^{-5}\) & 0.3558 \\
127 & 5.948 \(\times\) 10\({}^{-5}\) & 0.3362 \\
227 & 5.676 \(\times\) 10\({}^{-5}\) & 0.3195 \\
327 & 5.429 \(\times\) 10\({}^{-5}\) & 0.3043 \\
427 & 5.2 \(\times\) 10\({}^{-5}\) & 0.2906 \\
457 & 5.139 \(\times\) 10\({}^{-5}\) & \\
527 & 4.994 \(\times\) 10\({}^{-5}\) & \\
627 & 4.801 \(\times\) 10\({}^{-5}\) & \\
727 & 4.627 \(\times\) 10\({}^{-5}\) & \\
827 & 4.459 \(\times\) 10\({}^{-5}\) & \\
3316 & 13.442 \(\times\) 10\({}^{-5}\) & \\ \hline \hline \end{tabular}
\end{table} 
Table 2: Electric resistances of IM600/133 composite material [12; 27; 28]. \begin{table}
\begin{tabular}{c c c} \hline \hline \multirow{2}{*}{**Temperature/\({}^{\circ}\)C**} & \multicolumn{3}{c}{**Thermal Expansion Coefficients/\({}^{\circ}\)C\({}^{-1}\)**} \\ \cline{2-3}  & **Longitudinal** & **Transverse** & **Thickness** \\ \hline
25 & 1.8 \(\times\) 10\({}^{-8}\) & 2.16 \(\times\) 10\({}^{-5}\) \\
200 & 5.4 \(\times\) 10\({}^{-8}\) & 3.78 \(\times\) 10\({}^{-5}\) \\
260 & 5.4 \(\times\) 10\({}^{-8}\) & 3.78 \(\times\) 10\({}^{-5}\) \\
600 & 5.4 \(\times\) 10\({}^{This research is studied in ANSYS software and is divided into two modules. Namely, an electric-thermal coupling module and blow-off impulse module. Firstly, electric-thermal coupling analysis is performed and the temperature distribution in the composite reinforced panel is obtained. Blow-off impulse elements are then selected according to the temperature distribution. Finally, blow-off impulse analysis is performed according to the distribution of blow-off impulse elements. Electric-thermal element SOLID69 is adopted in the electric-thermal coupling module, this element type has 8 nodes and 2 degrees of freedom per node. Therefore, the model can be divided into hexahedral elements.