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首页> 外文期刊>Proceedings of the institution of mechanical engineers >Influence of multiple laser impacts on thin leading edges of turbine blade
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Influence of multiple laser impacts on thin leading edges of turbine blade

机译：多次激光冲击对涡轮叶片薄前缘的影响

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摘要

Laser shock peening is a mechanical surface improvement treatment used to enhance the fatigue life of critical components. This paper investigates the influence of multiple square laser impacts to study their special effect on the diverse mechanical behaviours of the thin leading edge surface of turbine blades. Most works existing in the literature have presented experimental investigations. The originality of our paper is to validate and numerically simulate the proposed model. Indeed, a 3D finite element method of a thin leading edge specimen, Ti-6Al-4V, of a turbine blade is numerically simulated using the ABAQUS software. The mechanical surface modifications (residual stresses, equivalent plastic strains and Johnson-Cook superficial damage) induced by the multiple square laser impact are examined in detail. The main purpose of this investigation is to determine the effects of single-sided and double-sided laser shock peening.
机译：激光冲击喷丸是一种机械表面改进处理，用于延长关键部件的疲劳寿命。本文研究了多个方形激光冲击的影响，以研究它们对涡轮叶片前缘薄表面的多种力学行为的特殊影响。文献中存在的大多数作品都提出了实验研究。本文的独创性是对所提出的模型进行验证和数值模拟。实际上，使用ABAQUS软件对涡轮叶片的薄前缘试样Ti-6Al-4V的3D有限元方法进行了数值模拟。详细检查了由多平方激光冲击引起的机械表面改性（残余应力，等效塑性应变和Johnson-Cook表面损伤）。这项研究的主要目的是确定单面和双面激光冲击喷丸的效果。

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