摘要
本文根据锯条不对称弯曲(或脉动)循环交变应力的持久极限,提出带锯条安全容许的高张紧力公式,并与日本木材工业手册(1982)的张紧力计算式和瑞典Kockums集团公司的高张紧力上限线作了对比。分析研究证明,作用于带锯条并转化成等效脉动循环容许的最大变应力大约为250N/mm^2。要提高张紧应力,必须使用较薄的锯条,以降低弯曲应力来补偿张紧应力的提高,保持总应力状态大致不变。
A Safety and allowable high-strain formula for band Saw-blades is proposed, according to the endurance limit of alternating stress in unsymmetrical bending (or pulsating) circulation, and comparisons with those formula given in the Japanese Hand-Book of wood Industry(1982)and with high-strain upper limit curve in Kockums Group (sweden) were also observed. The investigation revealed that an allowable maximum fluctuating stress, converted to iso-effective pulsating circulation, acting on the sawblade, is approximately 250N/mm^2. when the tensile stress increases, it is necessary to use a thinner saw-blade in order to decrease the bending stress to compensate the increased tensile stress rendering the total stress maintaining approximacely unchanged.
出处
《林业科学》
EI
CAS
CSCD
北大核心
1990年第1期67-73,共7页
Scientia Silvae Sinicae
关键词
锯条
容许高张紧力
计算
Safety and allowable high-strain
Endurance limit of alternating stress
Unsymmerical bending circulation of saw-blade
Iso-effective pulsating circulation
