## 1 Introduction  
The last few decades have seen rapid development in high-power laser technology, and the laser-induced thermal and mechanical problems have received much attention [1]. From the perspective of laser-matter interaction, the laser with an energy density higher than \(10^{3}\) W/cm\({}^{2}\) on the target is defined as a high-power laser, and otherwise is a low-power laser [2]. The mainstream researches have had a significant contribution to laser applications such as laser-based manufacturing, dynamic high-pressure issues in nuclear engineering, laser heat effect, and laser safety [3]. The heat effect of high-power lasers on solid materials is manifested by thermal effect and ablation-induced mechanical effect, exhibiting temperature rise, expansion, melting, vaporization, scattering, breakdown, and spallation [4]. Irradiation of varying laser power levels would cause different thermal stresses and thermal impacts correspondingly. In general, low-power lasers cause thermal-force coupling effects such as local temperature rise, thermal stress and even melting of the solid material targets; high-power lasers induce the target to generate plasma and cause high-amplitude shock waves yielding impact effects, and the anisotropic non-metallic material would show kinetic damages such as interlaminar cracking, superficial peeling, and cone-shaped perforation [4, 5]. [PERSON] et al. [6, 7] established a similarity criterion equation of the steel cylinder with inner pressure under laser irradiation by usingthe similarity analysis theory and Finite Element Method (FEM). [PERSON] et al. [8] experimented with a high-power laser beam directed onto thin aluminum sheets to demonstrate that airflow produces a strong enhancement of the interaction. According to the experiment, the airflow-induced pressure difference between front and rear faces causes the metal to bulge into the beam. [PERSON] et al. [9] studied the heat effect of the pulse-pulse composited laser, which is composed of a microsecond and a nanosecond pulsed laser. It found that when only a long-pulse laser is applied, there was a partial melting trace on the surface of the 2024 aluminum alloy plate, and when only a short-pulse laser is applied, the surface of the aluminum plate had obvious melting marks. Under the composited laser, the average power density of the facula area on the target surface is about the arithmetic superposition of the long-pulse laser and short-pulse laser, and the surface melting is stronger than that of single long-pulse laser applied. It remarked that the increment of the heat effect on the target is the result of the increasing of the laser power density. [PERSON] et al. [10] has carried out research on the damage effect of the composite laser on the flat window. According to the experimental results, the composite laser can effectively reduce the damage threshold of the flat window. [PERSON] et al. [11] irradiated metal samples with a continuous wave (CW) laser beam at a power of 1 kW and a wavelength of 1.07 \(\upmu\)m. Using high-speed video sequences yields expansion velocities of the vapor plume of samples. The experiment results indicate that the metal vapor is partially ionized and that there is a significant contribution of inverse bremsstrahlung to the absorption of laser energy in the partially ionized vapor plume. [PERSON] et al. [12] experimentally studied the thermodynamics process of steel sheets irradiated by a 1.07 \(\upmu\)m laser using a non-contact measuring method. Based on the experimental results, a criterion for the onset of the perforation explaining the observed local minimum in the perforation time versus beam radius curve is presented. [PERSON] et al. [13] simulated the composite laser irradiation on aluminum sheet. A finite element method was purposed to model the thermodynamic characteristics of aluminum sheet irradiated by a composite laser, which is coaxially combined by a 1064 nm pulse laser and a 1064 nm continuous laser.