j-factor

基本解释

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] 潘利剑，张博明，戴福洪。简谐激励下共固化复合材料黏弹阻尼结构的损耗因子研究[J]。振动与冲击，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;
对于组合汽缸、压力容器、焊接结构及大型旋转构件，我们采用应力强度因子K，裂纹张开位移（COD）和J积分理论用于分析和计算；
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.
通过进一步试验，总结形成了翅片板散热器空气侧换热系数计算的传热因子与气侧雷诺数的函数关系式。

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