结构学习基础篇之损伤描述

木棉花儿

机务老庄 发表于 2018-10-26 12:20
楼主   请问对于一个损伤属于什么类型     手册中的定义在哪一章

51-10-02第四段Damage Classification  自己看吧，不过主要还是看经验，多问问师傅
D. You must decide what type of damage has occurred to a structural member or to a structural
material. The definitions of the different types of damage that can occur to the external skin of the
airplane panels are given in the paragraphs that follow:
(1) Abrasion: A damaged area that is the result of scuffing, rubbing, or other surface erosion. This
type of damage is usually rough and has an irregular shape.
(2) Corrosion: Damage that is the result of a complex electro-chemical action, and gives a
cross-sectional area change. The depth of this damage must be determined by a cleanup or a
removal operation. This type of damage occurs on the surfaces, hole bores, or edges of
structural elements.
(3) Crack: A partial fracture or a full brake in the material that causes a significant cross-sectional
area change. This damage usually has an irregular line and is often the result of fatigue in the
material.
(4) Crease: A damaged area that is depressed or folded back so that its boundaries are sharp or
with well defined lines or ridges. Consider a crease to be equal to a crack.
(5) Delamination: A type of disbond that occurs between adjacent plies of material. If an allowable
damage section or repair section does not give limits for disbonds, then use the limits specified
for delaminations.
(6) Dent: A damaged area that is pushed in from its normal contour with no change in the
cross-sectional area of the material. The edges of the damaged area are smooth. This damage
is usually caused by a hit from a smoothly contoured object. The length of the dent is the
longest distance from one end to the other end. The width of the dent is the second longest
distance across the dent, measured at 90 degrees to the direction of the length.。。。。