Damage tolerance optimization method for rib integral panel

An integral wallboard and damage tolerance technology, applied in design optimization/simulation, special data processing applications, instruments, etc., can solve problems such as lack of processes and methods, achieve slow crack growth speed, clear analysis steps, and correct theoretical basis Effect
CN113190923APending Publication Date: 2021-07-30XIAN AIRCRAFT DESIGN INST OF AVIATION IND OF CHINA
5 Cites 0 Cited by

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
XIAN AIRCRAFT DESIGN INST OF AVIATION IND OF CHINA
Publication Date
2021-07-30

Smart Images

  • Figure 1
    Figure 1
  • Figure 2
    Figure 2
  • Figure 3
    Figure 3
Patent Text Reader

Abstract

The invention belongs to the field of aircraft structure damage tolerance design, and discloses a rib integral panel damage tolerance optimization method, which comprises the steps of integral panel reinforcement ratio determination, rib sensitive parameter identification, structure size optimization matrix establishment, crack-containing integral panel finite element model establishment, stress intensity factor k calculation and crack propagation life calculation, and determining optimal structural parameters by comparing the crack propagation lives under different sizes.
Need to check novelty before this filing date? Find Prior Art

Description

technical field

[0001] The invention belongs to the field of damage tolerance design of aircraft structures, and in particular relates to a method for optimizing the damage tolerance of rib overall wall plates. Background technique

[0002] Due to the advantages of good fatigue performance, simple manufacture and light structure weight, the integral panel has been applied in many medium and large aircraft structures. However, compared with the traditional riveted siding, the integral siding lacks the natural crack arresting element—the rivet connecting the stringer and the skin, which makes the damage tolerance performance poor. The damage tolerance characteristics of the panels are an important design point for integral panels used in aircraft structures. In the past few years, when the structural design of the integral wall panel generally focused on the static strength performance, if the requirements were met, only a passive check was performed on whether the wall panel...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More