Characterization of temperature and strain fields during cyclic laser shocks

Charbal Ali; Vincent Ludovic; Hild Francois; Poncelet Martin; Dufour John-Eric; Roux Stephane; Farcage Daniel

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Characterization of temperature and strain fields during cyclic laser shocks

机译：周期性激光冲击过程中温度和应变场的表征

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Thermal shocks are applied to a 304L austenitic stainless steel plate with a pulsed laser. A stroboscopic reconstruction is used for infrared (IR) and visible light camera measurements. The displacement fields are measured with a digital image correlation (DIC) technique. Different IR devices are used to measure the temperature variations (i.e. medium wave camera and short wave pyrometry). Several ways of determining the emissivity or absorptivity are discussed. The complete 3D thermal loading is numerically determined by minimising the difference between experimental measurements and finite element analyses of thermal fields. An elastoplastic model is then used to compute mechanical fields that are compared with DIC measurements.

机译：热冲击通过脉冲激光施加到304L奥氏体不锈钢板上。频闪重建用于红外（IR）和可见光摄像机的测量。位移场通过数字图像相关（DIC）技术进行测量。使用不同的红外设备来测量温度变化（即中波相机和短波高温计）。讨论了确定发射率或吸收率的几种方法。通过最小化实验测量值与热场的有限元分析之间的差异，以数字方式确定完整的3D热负荷。然后，将弹塑性模型用于计算与DIC测量结果进行比较的机械场。

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《Quantitative Infra Red Thermography Journal》 |2016年第1期|共18页
作者
Charbal Ali; Vincent Ludovic; Hild Francois; Poncelet Martin; Dufour John-Eric; Roux Stephane; Farcage Daniel;
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正文语种 eng
中图分类光学;
关键词
digital image correlation; infrared thermography; emissivity; finite element analysis; laser shocks;

机译：数字图像相关;红外热成像;发射率;有限元分析;激光冲击;

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1. Characterization of temperature and strain fields during cyclic laser shocks [J] . Charbal Ali, Vincent Ludovic, Hild Francois, Quantitative Infra Red Thermography Journal . 2016,第1期

机译：周期性激光冲击过程中温度和应变场的表征
2. Notch Root Biaxial Cyclic Strain Behavior of Type 304 Stainless Steel at Elevated Temperature Using Laser Speckle Strain/Displacement Gauge [J] . Hiroyuki Waki, Keiji Ogura, Izuru Nishikawa JSME International Journal. Series A . 2001,第3期

机译：304型不锈钢在高温下的缺口根双轴循环应变特性，采用激光散斑应变/位移计
3. Proposition of an uncoupled approach for the identification of cyclic heat sources from temperature fields in the presence of large strains [J] . Glanowski Thomas, Le Saux Vincent, Doudard Cedric, Continuum mechanics and thermodynamics . 2017,第5期

机译：在大菌株存在下鉴定循环热源循环热源的解释
4. Residual stress state and cyclic deformation behaviour of deep rolled and laser-shock peened AISI 304 stainless steel at elevated temperatures [C] . I. Nikitin, I. Altenberger, B. Scholtes International Symposium on Residual Stresses . 2005

机译：深层轧制和激光冲击喷丸的残余应力状态和循环变形行为升高温度下的不锈钢
5. Experimental study and constitutive modelling of cyclic behaviour at small strains of unsaturated silt at various temperatures [D] . Zhou, Chao 2014

机译：不同温度下不饱和粉土小应变循环行为的试验研究和本构模型
6. Improvement in Fatigue Performance of Aluminium Alloy Welded Joints by Laser Shock Peening in a Dynamic Strain Aging Temperature Regime [O] . Chun Su, Jianzhong Zhou, Xiankai Meng, 2016

机译：动态应变时效温度下激光冲击喷丸改善铝合金焊接接头的疲劳性能
7. Characterization of temperature and strain fields during cyclic laser shocks [O] . Charbal, Ali, Vincent, Ludovic, Hild, François, 2016

机译：周期性激光冲击过程中温度和应变场的表征
8. Noncontacting Laser Diffraction Strain Extensometer for Material Properties Characterization at High Temperatures. [R] . Liu, K. C., Pih, H. 1989

机译：非接触式激光衍射应变引伸计在高温下的材料特性表征。

Characterization of temperature and strain fields during cyclic laser shocks

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