飞机结构件在当量环境谱下加速腐蚀试验和日历寿命估算方法

 首次成功地进行了构件在当量环境谱下的加速腐蚀试验,取得了防护层日历有效期和基体腐蚀扩展速率;建立了一套由试验数据估算日历首翻期、日历翻修间隔、日历总寿命的方法和公式;提出了由使用中真实的腐蚀损伤数据来估算日历首翻期的方法;在构件加速腐蚀试验和使用中真实腐蚀损伤数据统计处理的基础上,给出了 HX型机群日历寿命。

ACCELERATED CORROSION TEST OF THE AIRCRAFT STRUCTURE UNDER EQUIVALENT ENVIRONMENT SPECTRUM AND THE COMPUTING METHOD FOR THE CALENDAR LIFE

It has been first successfully completed on the accelerated corrosion test of the aircraft structure under equivalent environment spectrum,and the calendar effective time of protection coating systems ( y_o) and corrosion propagation rate( v ) of the body are obtained. A set of method and formula for the computation of calendar first D check, calendar time since overhaul and total calendar life is presented by using tests data. It is obtained that the calendar first D check y1=y_o +y_c , calendar time since overhaul y_N =y₁-(y_oy_O ), and the total calendar life Y_T =y_o (1+R+…+R^N)+(N+1)Y_C+NY_S.Using aircraft service corrosion damage date, the computed method of calendar first D check is found. Based on components accelerated corrosion test and statistical data of service corrosion damage, the calendar life for the aircraft of HX type is given out.