| 引用本文: | 刘存， 李健， 赵谋周.喷丸处理对机翼加筋壁板压缩强度的影响[J].中国表面工程,2016,29(1):111~117 |
| LIU Cun, LI Jian, ZHAO Mouzhou.Influences of Shot Peening on Compressive Strength of Wing Stiffened Panel[J].China Surface Engineering,2016,29(1):111~117 |
|
| 摘要: |
| 现代大型飞机机翼壁板广泛采用喷丸成形和强化工艺，但喷丸处理对加筋壁板静强度性能的影响研究较少，目前工程上还难以定量评估。通过对壁板失效模式的分析，梳理了喷丸处理影响机翼壁板压缩强度的主要因素，即剖面压损强度以及压缩模量，规划了典型机翼上壁板喷丸试件和未喷丸试件的压损对比试验，研究了喷丸处理对压损强度和局部屈曲载荷的影响。试验结果表明：喷丸后壁板的压损强度和局部屈曲载荷均有所降低。根据试验结果提出了采用基于喷丸处理前后压损应力下降幅度确定的喷丸影响系数κ1，以及压缩模量下降幅度确定的喷丸影响系数κ2修正JOHNSONEULER方程的方法。该方法客观准确地将喷丸处理影响计入到加筋壁板的压缩强度设计中，实现了对喷丸处理影响的定量评估，工程应用简便易行。 |
| 关键词: 喷丸处理 加筋壁板 压损 修正 影响系数 |
| DOI：10.11933/j.issn.1007-9289.2016.01.016 |
| 分类号: |
| 基金项目: |
|
| Influences of Shot Peening on Compressive Strength of Wing Stiffened Panel |
|
LIU Cun, LI Jian, ZHAO Mouzhou
|
|
AVIC The First Aircraft Institute, Xi’an 710089
|
| Abstract: |
| Shot peening forming and strengthening is widely taken in modern large aircraft wing stiffened panels, however, the influence of shot peening on staticstrength properties is studied scarcely, and can not be quantitatively assessed in the engineering presently. The main factors that affect the compressive strength of wing stiffened panels were combed by analyzing failure mode of stiffened panels, including crippling strength and compressive modulus. Crippling comparison test were carried out on shot peened and unpeened specimens of typical stiffened panels. The effects of shot peening on crippling strength and local buckling load were studied. The results show that the crippling strength and local buckling load of shot peened specimens are reduced. Therefore, a new JohnsonEuler formula amendment methodology is developed to consider the shot peening influence coefficient κ1 based on the fall range of crippling stress and κ2 based on the fall range of compressive modulus. In this way, the influences of shot peening are included in the stiffened panels compressive strength design objectively and accurately, and the quantitative evaluation of shot peening can be simply and feasibly applied in the engineering. |
| Key words: shot peening stiffened panel crippling amendment influence coefficient |
