Shot peening for fatigue life improvement of aerospace strutures

喷丸强化提高航空航天结构的疲劳寿命

• 批准号: 435539-2012
• 负责人: Lévesque, Martin
• 金额: $ 15万
• 依托单位: École Polytechnique de Montréal
• 依托单位国家: 加拿大
• 项目类别: Collaborative Research and Development Grants
• 财政年份: 2014
• 资助国家: 加拿大
• 起止时间: 2014-01-01 至 2015-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=552796
• 关键词: Shot; peening; fatigue; life; improvement

Shot peening is a cold working process widely used to improve the fatigue life of metal components in the aerospace industry. This process is accomplished by bombarding the surface of a metallic component with shots at a high velocity that induce a plastic deformation layer near the surface. This plastic deformation leads to a residual compressive stress field in the peened surface that reduces the likelihood of premature failure under cyclic loading conditions and therefore improves the fatigue life of the peened component.

喷丸强化是一种广泛用于提高航空航天工业金属部件疲劳寿命的冷加工工艺。这个过程是通过用高速弹丸轰击金属部件的表面来完成的，这些弹丸在表面附近引起塑性变形层。这种塑性变形导致喷丸表面中的残余压缩应力场，这降低了在循环载荷条件下过早失效的可能性，因此提高了喷丸部件的疲劳寿命。