Study on the Damage Tolerance of a Stiffened Panel with a Skin Pad
During the development of an aircraft structure design, designers draw out a skin-stringer panel with a skin pad on the basis of a conventional skin-stringer panel(skin is directly connected with stringer by rivets or there was a sheet betweeen skin and stringers) to reduce the manufacturing cost. In this paper, we calculated the SIF of three kinds of skin-stringer panels by FE. And then, we analyze the damage tolerance of these structures by fortran program. Especially we carried out a crack propagation experiment of a skin-stringer panel with a skin pad and compared it with the results of a static analysis. Finally we researched the influence of the thickness of a skin pad on the damage tolerance. According to the researches above we concluded the advantages of the skin-stringer panel with a skin pad on the damage tolerance, and presented some suggestions about the thickness of a skin pad.
Wei Yang, Mamtimin Geni, Tiejun Wang and Zhuo Zhuang
Y. Li and S. N. Wang, "Study on the Damage Tolerance of a Stiffened Panel with a Skin Pad", Advanced Materials Research, Vols. 33-37, pp. 297-300, 2008