采用屈服强度在138～878 MPa之间的几种材料的试验数据,考查了前人提出的材料性能对伸张区宽度与裂尖张开位移比值(WSZ/δ)的影响规律.结果表明:Prantl提出WSZ/δ的值与材料的应变硬化指数和屈服强度之间的关系与试验结果吻合较差,根本原因在于其推导过程中采用的假设前后矛盾.WSZ/δ值与流变应力呈近似线性关系,而不是呈正比关系.
参考文献
| [1] | Landes J D .The blunting line in elastic-plastic fracture[J].Fatigue & Fracture of Engineering Material & Structure,1995,18(11):1289-1297. |
| [2] | Cao W D;Lu X P .On the relationship between the geometry of deformed crack tip and crack parameters[J].International Journal of Fracture,1984,25:33-52. |
| [3] | Hopkins P;Jolley G.The significance of crack tip blunting (stretch zones) in fracture toughness specimens[A].London:Chameleon Press,1982:3-10. |
| [4] | Luis Rogerion de o Hein;Ammann J J;Ana Maria M Nazar .Boundary identification criteria and geometry analysis of Al7050 stretch zone from election profiles[J].Materials Characterization,1999,43:21-26. |
| [5] | Mills W J .On the relationship between stretch zone formation and the J integral for high strain-hardening materials[J].Journal of Testing and Evaluation,1981,9(01):56-62. |
| [6] | Sreenivasan P R;Ray S K;Vaidyanathan S et al.Measurement of stretch zone height and its relationship to crack tip opening displacement and initiation J-value in an AISAI 316stainless steel[J].Fatigue & Fracture of Engineering Material & Structure,1996,19(07):855-868. |
| [7] | Kolednik O;Stuwe H P .An extensive analysis of a J1c-test[J].Engineering Fracture Mechanics,1986,24(02):277-290. |
| [8] | Otsuka A;Miyata T;Nishimura S.Crack initiation from a sharp notch and stretched zone[J].Engineering Fracture Mechanics,1975(07):419-428. |
| [9] | Yin S W;Gerbrands R A;Hartevelt M .An investigation of the blunting line[J].Engineering Fracture Mechanics,1983,18(05):1025-1036. |
| [10] | Pandey R K;Sundaram P;Kumar A N .A stretched zone method for CTOD evaluation[J].International Journal of Fracture,1991,47:R29-R32. |
| [11] | Prantl G .Equations for COD blunting lines[J].International Journal of Fracture,1986,32(01):R7-R10. |
| [12] | 杨宗发;陈正新;王文彬 等.J1c测试中伸张区的测定[J].清华大学学报(自然科学版),1983,23(01):39-47. |
| [13] | Schwalbe K H;Heerens J.Suggestions for a modification of ASTM E813[A].Philadelphia,PA:American Society for Testing and Materials,1985:411-416. |
| [14] | Heerens J;Schwalbe K H;Cornec A.Modifications of ASTM E813-81 standard test method for an improved definition of J1c using new blunting-line equation[A].Philadelphia,PA:American Society for Testing and Materials,1988:374-389. |
| [15] | Shih C F .Relationships between the J-integral and the crack opening displacement for stationary and extending cracks[J].Journal of the Mechanics and Physics of Solids,1981,29(04):305-326. |
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%