97FTM14-1997

Refinements in Root Stress Predications for Edges of Helical Gear Teeth

97FTM14-1997 发布历史

Industry demands for higher power density gearboxes to improve product performance require utilization of the load carrying capability of every inch of available face width. As a result@ load distributions and the resulting root stresses are of considerable importance. Current analytical methods include three dimensional finite element analysis (FEA) and combinations of Wellauer and Seireg's moment image method with two dimensional boundary element analysis or beam bending formulas. Three dimensional FEA@ although reliable@ is time consuming and of great expense in comparison to the use of classical techniques and approximations. In helical gears these approximations give reasonable estimates of root stress distributions along the face width but lack the accuracy to design to engineering limits. Based upon finite element and experimental results@ a discrepancy in the approximate methods is the stiffness change in the normal plane associated with the ends of helical gear teeth. Tooth stiffness is lower at the acute edge@ where the normal force associated with tooth contact protrudes beyond the transverse edge of the gearon the back side of the tooth. The opposite result occurs at the obtuse edge@ where the normal force is not producing beyond the transverse edge of the tooth. Analytical and experimental studies for a limited number of cases have been completed. The experimental results are used to verify the simplified three dimensional FEAparametric study on the effect of helix angle. The parametric study results@ when completed@ will be used to determine a root stress correction factor. The focus of this paper is on the initial parametric results and experimental studies@ with an introduction to possible correction techniques. The correction factors are currently being researched and will be the topic of future publications.

97FTM14-1997由AGMA - American Gear Manufacturers Association 发布于 1997-11-01，并于 2001-08-17 实施。

97FTM14-1997的历代版本如下：

• 1997年11月01日 97FTM14-1997

非常抱歉，我们暂时无法提供预览，您可以试试： 免费下载 97FTM14-1997 前三页，或者稍后再访问。

注意： 点击下载后，生成下载文件时间比较长，请耐心等待......

标准号

97FTM14-1997

发布日期

1997年11月01日

实施日期

2001年08月17日

废止日期

无

中国标准分类号

/

国际标准分类号

/

发布单位

AGMA - American Gear Manufacturers Association

引用标准

11

适用范围

Industry demands for higher power density gearboxes to improve product performance require utilization of the load carrying capability of every inch of available face width. As a result@ load distributions and the resulting root stresses are of considerable importance. Current analytical methods include three dimensional finite element analysis (FEA) and combinations of Wellauer and Seireg's moment image method with two dimensional boundary element analysis or beam bending formulas. Three dimensional FEA@ although reliable@ is time consuming and of great expense in comparison to the use of classical techniques and approximations. In helical gears these approximations give reasonable estimates of root stress distributions along the face width but lack the accuracy to design to engineering limits. Based upon finite element and experimental results@ a discrepancy in the approximate methods is the stiffness change in the normal plane associated with the ends of helical gear teeth. Tooth stiffness is lower at the acute edge@ where the normal force associated with tooth contact protrudes beyond the transverse edge of the gearon the back side of the tooth. The opposite result occurs at the obtuse edge@ where the normal force is not producing beyond the transverse edge of the tooth. Analytical and experimental studies for a limited number of cases have been completed. The experimental results are used to verify the simplified three dimensional FEAparametric study on the effect of helix angle. The parametric study results@ when completed@ will be used to determine a root stress correction factor. The focus of this paper is on the initial parametric results and experimental studies@ with an introduction to possible correction techniques. The correction factors are currently being researched and will be the topic of future publications.