Laser Cutting of Functional Materials by Twin Laser Beam and Thermal Stress Analysis

双激光束激光切割功能材料和热应力分析

基本信息

批准号：
16360050
负责人：
MUTOH Yoshiharu
金额：
$ 9.66万
依托单位：
Nagaoka University of Technology
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (B)
财政年份：
2004
资助国家：
日本
起止时间：
2004 至 2006
项目状态：
已结题

项目摘要

1.According to the laser cutting experiment, crack growth direction was going to out of the laser scanning line when the direction of the laser changed regardless of the angle.2.Crack growth direction was predicted by FEM analysis with the maximum tangential stress theory. Result of the analysis showed good agreement with that of the experiment.3.It could be possible to control crack growth direction by controlling laser scanning direction according to the result of FEM analysis. However, control of laser scanning direction is complicate and it is difficult to predict a crack growth direction.4.Appling a twin laser beam placed forward and following of the crack tip with in parallel to the laser scanning line is effective to control the crack growth direction according to the result of FEM analysis. Crack growth direction could change by the beam intensity ratio between two beams and the position of the following beam.5.Twin laser beam head was developed by using a prism to sprit a laser beam. This method is simple and easy way to obtain twin laser beam. By adding the control system for the position of a prism in the laser head, it could be possible to cut the complicated shape based on the result of FEM analysis.6.Crack initiation behavior was studied by using the specimen without a starter notch. Crack may earlier initiates when the defocusing distance is small.7.Stress distribution was steep in case of defocusing distance is small according to the results of FEM analysis. Crack unstably propagated with the condition.

1.根据激光切割实验，当激光方向改变时，无论角度如何，裂纹扩展方向都会偏离激光扫描线。2.利用最大切向应力理论，通过有限元分析预测裂纹扩展方向。分析结果与实验结果吻合较好。3.根据有限元分析结果控制激光扫描方向可以控制裂纹扩展方向。但激光扫描方向的控制比较复杂，难以预测裂纹扩展方向。4.采用平行于激光扫描线放置在裂纹尖端前后的双激光束，可有效控制裂纹扩展。根据FEM分析的结果确定方向。裂纹扩展方向可以通过两束光束的强度比和后续光束的位置来改变。5.采用棱镜发射激光束，开发了双激光束头。该方法是获得双激光束的简单易行的方法。通过在激光头中添加棱镜位置控制系统，可以根据有限元分析的结果切割复杂的形状。6.使用没有起始切口的试样研究裂纹萌生行为。当离焦距离较小时，裂纹可能较早萌生。7.根据有限元分析的结果，当离焦距离较小时，应力分布较陡。裂纹随条件不稳定扩展。

项目成果

期刊论文数量（26）

专著数量（0）

科研奖励数量（0）

会议论文数量（0）

专利数量（0）

Effect of roughness at the edge part of the specimen on laser cutting of a glass

样品边缘部分粗糙度对玻璃激光切割的影响

DOI：
发表时间：
2007
期刊：
Proceedings of JSME Hokuriku-Shinetsu Branch GAKUSEIKAI 36^<th> GAKUSEIIN SOTUSGYO-KENKYU HAPPYOUKAI
影响因子：
0
作者：
K.Hirahara;Y.Miyashita;T.Kondoh;S.Supamard;R.Borrisutthekul;Y.Mutoh
通讯作者：
Y.Mutoh

ガラスのレーザ割断におけるき裂発生挙動に及ぼす試験片端部粗さの影響

玻璃激光切割过程中试样边缘粗糙度对裂纹萌生行为的影响