夹杂、温度和远场应力是影响粉末高温合金材料断裂性能的重要因素.本文建立了考虑裂纹面接触的含夹杂裂纹体有限元模型,计算了夹杂、温度和远场应力对裂纹闭合的影响.计算结果分析表明:当夹杂与基体未脱开时,夹杂对裂纹的张开应力几乎没有影响,而裂开的夹杂可显著提高裂纹的张开应力;均匀的温度场能显著降低裂纹的张开应力;远场应力越大,裂纹张开应力越大.
参考文献
| [1] | 宋迎东.粉末冶金涡轮盘的应用及寿命研究[J].航空动力学报,1996(03):294. |
| [2] | 国为民.FGH95镍基粉末高温合金中夹杂对低周疲劳性能的影响[J].金属学报,1999(02):35. |
| [3] | Elber W .Fatigue Crack Closure Under Cyclic Tension[J].Engineering Fracture Mechanics,1970,2:37-45. |
| [4] | McClung,R.C.Finite Element Analysis of Fatigue Crack Closure:A Historical and Critical Review[A].北京,1999 |
| [5] | Newman J C Jr.A Finite-Element Analysis of Fatigue Crack Closure[M].Mechanics of Crack Growth,ASTM STP 590,American Society for Testing and Materials,1976:281-301. |
| [6] | McClung R;C,Sehitoglu,H .On the Finite Element Analysis of Fatigue Crack Closure-1.Basisc Modeling Issues[J].Engineering Fracture Mechanics,1989,33(02):237-252. |
| [7] | Dougherty J D;Padovan,J;Srivatsan,T.S .Fatigue Crack Propagation and Closure Behavior of Modified 1070 Steel:Finite Element Study[J].Engineering Fracture Mechanics,1997,50(02):189-212. |
| [8] | Chermahini R G;Palmberg,B;Blom,A.F .Fatigue Crack Growth and Closure Behaviour of Semicircular and Semi-Elliptical Surface Flaws[J].International Journal of Fatigue,1993,15(04):259-263. |
| [9] | J. Z. Zhang;P. Bowen .On the finite element simulation of three-dimensional semi-circular fatigue crack growth and closure[J].Engineering Fracture Mechanics,1998(3):341-360. |
| [10] | 宋迎东 .粉末冶金涡轮盘强度与寿命研究[D].南京航空航天大学,1997. |
| [11] | 张宏图 .陶瓷-金属界面的垂直微裂纹问题[J].青岛大学学报(自然科学版),1994,7(01):7. |
| [12] | McClung R C .Crack Closure and Plastic Zone Sizes in Fatigue[J].Fatigue & Fracture of Engineering Material & Structure,1991,14(04):455-468. |
上一张
下一张
上一张
下一张
计量
- 下载量()
- 访问量()
文章评分
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%