Quantitative description of infrared radiation characteristics for solid materials subjected to external loading

Abstract

Based on the thermodynamics theory and physical micro-properties of solid materials subjected to external loading at room temperature, a formula of calculating temperature difference of infrared radiation in terms of the sum of three principal strains was deduced to quantitatively investigate the infrared radiation characteristics in test. Two typical specimens, the three-point bending beam and the disc pressed in diameter, were tested and their principal strains were calculated by finite element method in order to obtain the temperature differences of infrared radiation. Numerical results are in a good agreement with test results, which verifies the validity of the formula of calculating temperature differences of infrared radiation and the model of quantitatively describing the infrared radiation characteristics of solid materials, and reveals the corresponding inner physical mechanism.

Keywords

Infrared radiation characteristics / thermodynamics analysis / numerical simulation / strain tensor

References

[1] LIU Shan-jun, YANG Dong-ping, MA Bao-dong, WU Li-xin, LI Jin-ping, DONG Yan-qing. On the features and mechanism of satellite infrared anomaly before earthquakes in Taiwan region[C]//Geoscience and Remote Sensing Symposium. Barcelona, 2001: 3719–3722.

[2] GornyiV. I., SalmanA. G., TroninA. A., ShilinB. B.. The earth outgoing IR radiation as an indicator of seismic activity[J]. Proc Acad Sci USSR, 1988, 30(1): 67-69

[3] LUONG M P. Fatigue evaluation of metals infrared thermography[C]//The Second International Conference on Experimental Mechanics. Singapore, 2001: 297–302.

[4] WU Li-xin, ZHONG Sheng, WU Yu-hua. Fundamental research on remote sensing the strain and catastrophe of concrete under uniaxial compression[J]. International Geoscience and Remote Sensing Symposium, 2005(3): 1760–1763.

[5] WuL.-x., LiuS.-j., WuY.-h., WuH.-ping.. Changes in infrared radiation with rock deformation[J]. International Journal of Rock Mechanics and Mining Science, 2002, 39: 825-831

[6] ZhangD.-s., AnL.-q., ZhangY.-jun.. IR thermograph characteristics of photoelastical material in loading[J]. Journal of Experimental Mechanics, 2001, 16: 444-449

[7] WuL.-x., ZhongS., WuY.-h., WangC.-ying.. Precursors for rock fracturing and failure. Part I: IRR image abnormalities[J]. International Journal of Rock Mechanics and Mining Sciences, 2006, 43: 473-482

[8] ShiW.-z., WuY.-h., WuL.-xin.. Quantitative analysis of projectile impact on rock using infrared thermography[J]. International Journal of Impact Engineering, 2007, 34: 990-1002

[9] WuL.-x., ZhongS., WuY.-h., WangC.-y., ZhangLing.. Time dependent features of thermal infrared radiation temperature of rock impacted by free-falling steel ball[J]. Journal of China University of Mining and Technology, 2005, 34(5): 557-563

[10] PandeyK. N., ChandS.. Deformation based temperature rise: A review[J]. International Journal of Pressure Vessels and Piping, 2003, 80: 673-687

[11] AN Li-qian, ZHANG Dong-sheng. Quantitative analysis between infrared temperature field and photo-elastic stress field[C]//Proceedings of the 21st International Symposium on Computer Application in Minerals Industries. Beijing, 2001: 689–692.

[12] LuoW. B., YangT. Q., LiZ. D., YuanL. W.. Experimental studies on the temperature fluctuations in deformed thermoplastics with defects[J]. International Journal of Solid and Structure, 2000, 37: 887-897

[13] ZhangY.-jun.Study on IR radiation regular pattern pattern of photoelastic material under loading and correlative studies[D], 2003, Beijing, China University of Mining and Technology (Beijing)

[14] ZhangD.-sheng.Study on infrared temperature field and isochromatics of the photoelastic material loaded[D], 2000, Beijing, China University of Mining and Technology (Beijing)

[15] EbertM. M., RannessH. C.Thermodynamics theory and exercises[M], 1976, Beijing, Chemical Industry Press: 47-113

[16] ChenHeng.Infrared physics[M], 1985, Beijing, National Defense Industry Press