Three-dimensional Stress Fields of Laser Damaged Fused Silica

Shaowei Sun; Naijie Qi; Yan Kong; Cheng Liu; Shumei Gao

doi:10.3788/CJL202148.0101001

Journals >Chinese Journal of Lasers >Volume 48 >Issue 1 >Page 0101001 > Article

Chinese Journal of Lasers
Vol. 48, Issue 1, 0101001 (2021)

Three-dimensional Stress Fields of Laser Damaged Fused Silica

Shaowei Sun¹, Naijie Qi¹, Yan Kong¹, Cheng Liu^1、2, and Shumei Gao^1、*

Author Affiliations

¹School of Science, Jiangnan University, Wu Xi, Jiangsu 214122, China

²Key Laboratory of High Power Laser and Physics, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, China

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DOI: 10.3788/CJL202148.0101001 Cite this Article Set citation alerts

Shaowei Sun, Naijie Qi, Yan Kong, Cheng Liu, Shumei Gao. Three-dimensional Stress Fields of Laser Damaged Fused Silica[J]. Chinese Journal of Lasers, 2021, 48(1): 0101001 Copy Citation Text

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Schematic of interaction between CO2 laser and fused silica glass. (a) Three-dimensional numerical model; (b) flow chart

Fig. 1. Schematic of interaction between CO₂ laser and fused silica glass. (a) Three-dimensional numerical model; (b) flow chart

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Temperature distributions inside sample and initial surface damage morphologies under irradiation with different pulse energies. (a)(d) 1 J; (b)(e) 2.5 J; (c)(f) 5.3 J

Fig. 2. Temperature distributions inside sample and initial surface damage morphologies under irradiation with different pulse energies. (a)(d) 1 J; (b)(e) 2.5 J; (c)(f) 5.3 J

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Fig. 3. Two- and three-dimensional stress distributions under different pulse energies. (a)(b) 1J; (c)(d) 2.5J; (e)(f) 5.3J

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Fig. 4. Three-dimensional stress distributions under CO₂ laser damage. (a)Experimental result; (b) simulation result

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Fig. 5. Radial stress and hoop stress distributions at different sample depths under different laser energies. (a)(b) 1 J;(c)(d) 2.5 J; (e)(f)5.3 J

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Parameter	Value	Unit
Density ρ	2201	kg·m^-3
Heat capacity C	-120+4.56×T-7.38×10^-3×T²+6.59×10^-6×T³-3.05×10^-9×T⁴+5.72×10^-13×T⁵	J·(kg·K)^-1
Thermal conductivity k	1.12418+7.31454×10^-4×T+4.41871×10^-7×T²	W·(m·K)^-1
Imaginary part of refractive index n_i	1.82×10^-2+10.1×10^-5×(T-273)
Surface emissivity f	0.8
Young modulus E	7.2×10¹⁰	N·m^-2
Poisson ratio ν	0.17
Thermal expansion coefficient α	5×10^-7	K^-1
Shear modulus G	31.3	GPa
Strain reference temperature T_ref	293.15	K
Standard atmospheric pressure P₀	10⁵	Pa
Molar mass M	40×10^-3	kg·mol^-1
Perfect gas constant R	8.31	J·(K·mol)^-1
Latent heat of evaporation U_e	425	kJ·mol^-1

Table 1. Thermodynamic parameters of fused silica glass

Shaowei Sun, Naijie Qi, Yan Kong, Cheng Liu, Shumei Gao. Three-dimensional Stress Fields of Laser Damaged Fused Silica[J]. Chinese Journal of Lasers, 2021, 48(1): 0101001

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