铝锂合金喷丸强化数值模拟及试验

发布时间：2018-01-22 12:27

本文关键词： 铝锂合金喷丸强化有限元模拟残余应力弹丸模型　出处：《航空动力学报》2015年03期 　论文类型：期刊论文

【摘要】：根据喷丸强化工艺过程的特点,利用ABAQUS有限元计算软件建立了模拟喷丸残余应力场的三维有限元模型.在此模型基础上研究了喷丸速度、弹丸直径及弹丸数量等因素对铝锂合金喷丸残余应力场的影响规律,进而对比了单弹丸模型、均布式阵列弹丸模型和随机弹丸模型下残余应力场的分布规律.采用X射线残余应力仪和电解抛光法得到喷丸强化后沿铝锂合金试件厚度方向的残余应力分布规律.残余应力层深度约为0.24mm,最大残余应力出现在距表面深度为0.08mm处,验证了有限元模型的有效性.
[Abstract]:According to the characteristics of shot peening strengthening process, a three-dimensional finite element model was established to simulate the residual stress field of shot peening by using ABAQUS finite element calculation software, and the shot peening velocity was studied on the basis of the model. The influence of the diameter and quantity of projectile on the residual stress field of Al-Li alloy shot peening was studied, and the single projectile model was compared. The distribution rule of residual stress field in uniform array projectile model and random projectile model was obtained by using X-ray residual stress meter and electrolytic polishing method. The residual stress distribution gauge along the thickness direction of Al-Li alloy specimen after shot peening was obtained by means of X-ray residual stress meter and electrolytic polishing method. The depth of residual stress layer is about 0.24mm. The maximum residual stress occurs at a depth of 0.08mm from the surface, which verifies the validity of the finite element model.
【作者单位】：西北工业大学机电学院;中国航空工业集团公司中航飞机股份有限公司西安飞机分公司;
【基金】：国家自然科学基金(51275420)
【分类号】：TG668
【正文快照】： 铝锂合金是一种新型的航空航天结构材料,在铝合金中加入锂之后,可以减少铝合金的质量,增加刚度,同时仍然保持较高的强度、较好的抗腐蚀性和抗疲劳性以及适宜的延展性.在铝合金中每加入1%(质量分数)的锂,可使铝合金的密度降低约3%的同时使铝合金的弹性模量增加约6%,与普通铝合

【相似文献】