CAJ | 학술논문

为了改善波纹膜片实心激光冲击成形时膜片的中心部位容易产生反向塑性变形，甚至发生破裂的问题，采用数值模拟的方法探索了波纹膜片中空激光冲击成形，通过分析膜片成形后的截面轮廓以及厚度分布研究了中空激光光斑对波形膜片成形性能的影响。研究结果表明：在进行波纹膜片中空激光冲击成形时合适的光斑内径可以有效地减小膜片中心区域的反向塑性变形，使膜片和凹模底部贴合更紧密；并且合适的光斑内径可以有效地改善波纹膜片冲击成形后的厚度分布，避免膜片中心部位厚度严重减薄造成的破裂失效。
위료개선파문막편실심격광충격성형시막편적중심부위용역산생반향소성변형，심지발생파렬적문제，채용수치모의적방법탐색료파문막편중공격광충격성형，통과분석막편성형후적절면륜곽이급후도분포연구료중공격광광반대파형막편성형성능적영향。연구결과표명：재진행파문막편중공격광충격성형시합괄적광반내경가이유효지감소막편중심구역적반향소성변형，사막편화요모저부첩합경긴밀；병차합괄적광반내경가이유효지개선파문막편충격성형후적후도분포，피면막편중심부위후도엄중감박조성적파렬실효。
In solid laser shock forming of corrugated diaphragm,there are several problems in central part of the dia-phragm,such as producing reverse plastic deformation and even occurring fracture.To solve those problems,numerical simulation is applied to explore hollow laser shock forming of the diaphragm.Effect of hollow laser spot on diaphragm formability is researched through analyzing section contour and thickness distribution of the diaphragm after shock forming.The result shows that when conducting hollow laser shock forming of corrugated diaphragm,reverse plastic de-formation in central part of the diaphragm can be effectively reduced by adopting appropriate inner diameter of hollow laser,which makes the diaphragm fit die more tightly.Thickness distribution of the diaphragm after shock forming can also be improved with appropriate inner diameter,which avoids facture in central part of the diaphragm as a result of severe thinning.