Modeling of the Interaction of 10.6 pm Laser Radiation with Reinforced Plastics

Abstract

The objective of this work was to develop a phenomenological model of pulsed CO 2 laser interaction with reinforced composite materials. Experimental observation has shown that the multilayer composite material delaminates under pulsed CO 2 laser irradiation. This is a consequence of the energy storage mechanism arising out of a finite absorption depth to the laser radiation. A heat transfer model was developed to describe the observed delamination behavior of the composite materials. Good agreement was obtained between the model predictions ami experimental data. The model has been used to extrapolate to high average power irradiation. Nomenclaturec -specific heat E R = residual fluence E R() = residual fluence for surface at ambient temperature E v = heat of varporization h = laminate thickness R = pulse repetition frequency t = time T = absolute temperature T 0 = ambient temperature x = distance from target surface a. -thermal diffusivity A = laminate displacement Aw = velocity differential across laminate Ap = differential pressure d = constant in Eq. (5) p = material density X = conduction depth X a = absorption depth for laser radiation 8 = temperature, = T-T 0 r -shear stress in laminate li = glass viscosity i] = heat transfer parameter, = x/ (2^fai) £ = heat transfer parameter, =E RQ R/[pcaQ v ] f = mass removal parameter in Eq. (19) o) = Vctf/X Subscripts D = delamination V = vaporization R = removal

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“…[11][12][13][14][15][16][17][18] The new phenomena and effects in the interaction of strong laser radiation with materials include an in-depth understanding of the causes and process rules and exploring its possible applications in developing optical modulators, saturable absorbers, solar cells, supercapacitors, and other optical devices. [19][20][21][22][23][24] Studying nonlinear optics is vital to developing laser technology, spectroscopy, and material structure analysis. [25][26][27][28] Recently, nanosheets have shown new optical properties.…”

An Organic Double-Layer Coating on Aluminum and Steel Substrates for Anti-Laser Protection

“…Research on anti-laser properties of various materials is significant in laser material processing and in developing laser protective materials. In general, thermo, force and radiation are the main detriments that take place when laser interacts with materials [1,2], especially for high-energy laser, which is claimed to be a crucial threat in modern and future combats. Lots of researches have shown that there are two main approaches to protect items from high-energy laser radiation.…”