采用数值模拟的方法研究了试样尺寸对Al2O3陶瓷和Nb钎焊接头残余应力场分布的影响,研究发现试样尺寸变化会对接头的残余应力场产生一定的影响.当试样尺寸在高度H方向上不断增加时,残余应力分布趋势基本不变,只是应力峰值有所增加,且当高度H增加到一定值时(在本研究中H=10 mm),其变化不再影响残余应力的分布,应力峰值不再增加.当试样尺寸在宽度W方向上增加时,残余应力也是呈现不断增加的趋势,当试样宽度W增加到25 mm后,残余应力峰值开始下降.所以适当增加试样尺寸可有效降低试样中残余应力分布,对接头设计有益.
参考文献
| [1] | B H Rabin;Williamson R L;Suresh S.Fundamentals of Residual Stresses in Joints Between Dissimilar Materials[J].MRS Bulletin,1995(01):37-39. |
| [2] | Neilsen M K;Stephens J J.Residual Stress in Metal-toCeramic Brazing Joints: Advanced Braze Alloy Constitutive Model[A].New Mexico,2000:411-418. |
| [3] | Selverian J H Kang S.Ceramic-to-metal Joints:Part Ⅱ Performance and Strength Prediction[J].American Ceramic Society Bulletin,1992(10):71. |
| [4] | 吴铭方,于治水,蒋成禹,祁凯,程晓农.反应层厚度对Al2O3/AgCuTi/Ti-6Al-4V接头强度的影响[J].稀有金属材料与工程,2000(06):419-422. |
| [5] | Wang X L;Hubbard C R;Spooner S et al.Mapping of the Residual Stress Distribution in a Brazed Zirconia-iron Joint[J].Materials Science and Engineering,1996,A211:45-53. |
| [6] | 顾钰熹.特种工程材料焊接[M].沈阳:辽宁科学技术出版社,1998 |
| [7] | Lee S-B;Kim J-H .Finite-element Analysis and X-ray Measurement of the Residual Stresses of Ceramic/metal Joints[J].Journal of Materials Processing Technology,1997,67:167-172. |
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