基于有限元法研究含盲孔缺陷构件的应力集中系数 Kt 随盲孔深度 h和盲孔直径φ的变化规律。利用锁相热像法的热弹性分析模式（E‐Mode）研究盲孔附近的应力分布，预测不同深度盲孔的 Kt ，与有限元结果相比较发现吻合良好。通过Altair Li软件中的耗散模式（D‐Mode）和Altair软件分别研究构件在疲劳过程中的固有耗散量和温度信号的变化规律，以评估疲劳损伤的演化过程。以固有耗散和温度信号的变化规律作为疲劳损伤的指标，快速预测带盲孔试件的疲劳极限，进而预测试件的疲劳缺口系数 Kf 。理论计算的结果证明了锁相热像法的有效性。
The relationships between the stress concentration factor Kt with the depth h and diameterφof the blind hole were investigated based on the FEM .The thermo‐elastic analysis mode (E‐Mode) built‐in the lock‐in thermography was utilized to study the stress distribution around the blind hole , and to predict the variation of Kt of different depth .Good predictions were achieved between the ther‐mography and FEM .The variations of the intrinsic dissipation and the temperature signal during fa‐tigue process were studied respectively using the dissipation mode (D‐Mode) of Altair Li and Altair software ,to evaluate fatigue damage evolution .These two signals were considered as fatigue damage markers to rapidly predict the fatigue limit and the fatigue notch factor Kf of the component with blind hole .T he theoretical result validates the capability of the lock‐in thermography .
参考文献
| [1] | PETERSON R E;PLUNKETT R .Stress concentration factors[J].Journal of Applied Mechanics,1975,42(01):248. |
| [2] | 王喜丰 .基于红外热像技术的应力分析关键技术研究[D].哈尔滨工业大学,2008. |
| [3] | 刘勋 .基于红外锁相热像的复合结构件应力分析及其实验研究[D].哈尔滨工业大学,2012. |
| [4] | Maldague X.;Marinetti S. .PULSE PHASE INFRARED THERMOGRAPHY[J].Journal of Applied Physics,1996(5):2694-2698. |
| [5] | Yanguang Zhao;Xinglin Guo;Mingfa Ren .Lock-In Infrared Thermography for Non-Destructive Testing of Grid Stiffened Composite Structure[J].Advanced Science Letters,2012(2):593-596. |
| [6] | Offermann S.;Bissieux C.;Frick H.;Beaudoin JL. .THERMOELASTIC STRESS ANALYSIS UNDER NONADIABATIC CONDITIONS[J].Experimental Mechanics,1997(4):409-413. |
| [7] | B. YANG;P.K. LIAW;M. MORRISON .Temperature evolution during fatigue damage[J].Intermetallics,2005(3/4):419-428. |
| [8] | Carosena Meola;Giovanni M Carlomagno .Recent advances in the use of infrared thermography[J].Measurement Science & Technology,2004(9):R27-R58. |
| [9] | Thomas Ummenhofer;Justus Medgenberg .On the use of infrared thermography for the analysis of fatigue damage processes in welded joints[J].International Journal of Fatigue,2009(1):130-137. |
| [10] | Fan, J.L.;Guo, X.L.;Wu, C.W.;Zhao, Y.G. .Research on fatigue behavior evaluation and fatigue fracture mechanisms of cruciform welded joints[J].Materials Science & Engineering, A. Structural Materials: Properties, Misrostructure and Processing,2011(29/30):8417-8427. |
| [11] | 闫志峰,张红霞,王文先,王凯,裴飞飞.基于红外热像法的AZ31B镁合金温度演化与疲劳寿命预测[J].中国有色金属学报（英文版）,2013(07):1942-1948. |
| [12] | L. Zhang;X. S. Liu;S. H. Wu;Z. Q. Ma;H. Y. Fang.Rapid determination of fatigue life based on temperature evolution[J].International Journal of Fatigue,2013:1-6. |
| [13] | G Pitarresi;E A Patterson .A review of the general theory of thermoelastic stress analysis[J].The Journal of Strain Analysis for Engineering Design,2003(5):405-417. |
| [14] | BRéMOND P;POTET P.Lock-in thermography:a tool to ana-lyze and locate thermomechanical mechanisms in materials and structures[A].Orlando:SPIE Press,2001:560-566. |
| [15] | KRAPEZ J C;PACOU D.Thermography detection of damage initiation during fatigue tests[A].Orlando:SPIE Press,2002:534-449. |
| [16] | Minh Phong Luong .Fatigue limit evaluation of metals using an infrared thermographic technique[J].Mechanics of materials,1998(1/4):155-163. |
| [17] | F. Cura;G. Curti;R. Sesana .A new iteration method for the thermographic determination of fatigue limit in steels[J].International Journal of Fatigue,2005(4):453-459. |
| [18] | 李萌,李旭东,张辉,吴东流,刘勋,刘俊岩.基于锁相红外热成像技术对铝合金铆接结构件疲劳极限的快速测定[J].工程力学,2012(12):28-33. |
| [19] | 郭杏林,王晓钢.基于锁相热象法的金属疲劳特性评估方法研究[J].机械强度,2010(02):305-309. |
| [20] | 石亦平;周玉蓉.ABAQUS 有限元分析实例详解[M].北京:机械工业出版社,2007 |
| [21] | Junling Fan;Xinglin Guo;Chengwei Wu.A new application of the infrared thermography for fatigue evaluation and damage assessment[J].International Journal of Fatigue,2012:1-7. |
| [22] | RISITANO A;RISITANO G .Cumulative damage evaluation in multiple cycle fatigue tests taking into account energy parameters[J].International Journal of Fatigue,2012,48:214-222. |
| [23] | 李光铎;乔务本 .盲孔对应力分布影响的三维有限元分析[J].焊接学报,1989,10(02):111-118. |
| [24] | 李旭东,刘勋,马渊,刘俊岩,吴东流.锁相红外热成像技术测量结构的应力分布[J].工程力学,2011(11):218-224. |
| [25] | 王永茂,郭兴旺,李日华.红外检测中缺陷大小和深度的测量[J].激光与红外,2002(06):404-406. |
| [26] | 刘俊岩,戴景民,王扬.红外锁相法热波检测技术及缺陷深度测量[J].光学精密工程,2010(01):37-44. |
| [27] | 樊俊铃,郭杏林,赵延广,吴承伟.定量热像法预测焊接接头的S-N曲线和残余寿命[J].材料工程,2011(12):29-33. |
| [28] | 王凯,闫志峰,王文先,张红霞,裴飞飞.循环载荷作用下镁合金温度演化及高周疲劳性能预测[J].材料工程,2014(01):85-89. |
| [29] | 樊俊铃,郭杏林,吴承伟,邓德伟.热像法和能量法快速评估Q235钢的疲劳性能[J].材料工程,2012(12):71-76. |
| [30] | 赵延广,郭杏林,任明法.含缺陷疲劳试件的锁相红外热成像无损检测[J].光学学报,2010(10):2776-2781. |
| [31] | 胡本润,刘建中,陈剑峰.疲劳缺口系数Kf与理论应力集中系数Kt之间的关系[J].材料工程,2007(07):70-73. |
| [32] | 姚卫星.结构疲劳寿命分析[M].北京:国防工业出版社,2003 |
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