A MULTIFRACTAL ANALYSIS OF SIZE EFFECT ON FATIGUE CRACK GROWTH

摘要：

Strength of materials is influenced by both the specimen (or structure) size and the materialmicrostructure. In particular, several experimental tests have shown a decrease of the materialstrength under static or fatigue loading by increasing the structure size with respect to the sizeof the material microstructure. As far as fatigue crack growth is concerned, limitedinformation on size effect is available in the literature. In the present paper, by exploitingsome concepts of fractal geometry, a definition of stress intensity factor based on physicaldimensions different from the classical ones is discussed. Then, a multifractal size-dependentfatigue crack growth law (expressing crack growth rate against stress intensity factor range) isproposed. Finally, such a law is used to interpret relevant experimental data related toconcrete.

作者: A.Carpinteri A.Spagnoli S.Vantadori

作者单位: Dept of Civil and Environmental Engineering & Architecture,University of Parma,Italy

会议类型: 国际会议

会议名称: 1st International Conference on Microstructure Related Durability of Cementitious Composites(首届与水泥基复合材料耐久性相关的微观结构国际会议)

会议地点: 南京

会议语种:英文

页码: 881-889

在线出版日期: 2008-10-13（万方平台首次上网日期，不代表论文的发表时间）