Structural design optimization of CFRP chopper disks

详细信息    查看全文

• 作者：Matthias Weinzierl ; ^{matthias.weinzierl@tum.de" class="auth_mail" title="E-mail the corresponding author} ; ; Markus Schatz ; Valeria Antonelli ; Horst Baier
• 关键词：Composite design ; Chopper disk ; CFRP ; Numerical optimization
• 刊名：Composite Structures
• 出版年：2016
• 出版时间：15 April 2016
• 年：2016
• 卷：140
• 期：Complete
• 页码：351-359
• 全文大小：2068 K

文摘

Chopper disks are commonly used in neutron Time-of-Flight (TOF) spectroscopy. Such disks have one or more cut-outs and rotate around an axis parallel to the neutron beam, reaching operational speeds of up to class="mathmlsrc">title="View the MathML source" class="mathImg" data-mathURL="/science?_ob=MathURL&_method=retrieve&_eid=1-s2.0-S026382231501106X&_mathId=si68.gif&_user=111111111&_pii=S026382231501106X&_rdoc=1&_issn=02638223&md5=d46bdcb7b379aad6142153ede635d237">class="imgLazyJSB inlineImage" height="14" width="54" alt="View the MathML source" style="margin-top: -5px; vertical-align: middle" title="View the MathML source" src="/sd/grey_pxl.gif" data-inlimgeid="1-s2.0-S026382231501106X-si68.gif">class="mathContainer hidden">class="mathCode">$380\mathrm{Hz}$. In order to achieve an increase in rotational speed, three aspects were investigated. First, the impact of mass distribution on the dynamical behavior of the disk was studied. Second, the radial displacement of the disk was analysed and the disk was afterwards numerically optimized for lower widening around the central drilling. Finally, stress concentrations around the bottom of the cut-outs were calculated and the shape of the cut-outs was optimized in order to lower failure indices. Dynamic and strength tests were performed, which confirmed the numerically determined results. Due to all numerical optimizations being made, the maximum rotational speed of the chopper disk could in total be increased by 25%.