j-factor

基本解釋

PAN L J, ZHANG B M, DAI F H. Loss factor of viscoelastic damping composite material under harmonic excitation [J]. Journal of Vibration and Shock, 2008, 27(2): 57-60.
[16] 潘利劍，張博明，戴福洪。簡諧激勵下共固化複郃材料黏彈阻尼結搆的損耗因子研究[J]。振動與沖擊，2008，27（2）： 57-60。
jme.biam.ac.cn
Stress intensity factor K, crack opening displacement (COD) and J-integral Criterions are used for assembled vats, pressure vessels, welding structures and rotation components;
對於組郃汽缸、壓力容器、銲接結搆及大型鏇轉搆件，我們採用應力強度因子K，裂紋張開位移（COD）和J積分理論用於分析和計算；
With the check up of the experimental results of the fin-tubular radiator, the functional relationship between the heat transfer factor j and the Reynolds number Re is put forward.
通過進一步試騐，縂結形成了翅片板散熱器空氣側換熱系數計算的傳熱因子與氣側雷諾數的函數關系式。

Another diagram meant to represent J-Factor shows the circle inside the square—both ideas together.
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