Take a look at this:
http://www.google.it/url?sa=t&rct=j&q=&esrc=s&source=web&cd=1&cad=rja&uact=8&ved=0CCYQFjAA&url=http%3A%2F%2Fwww.kps.or.kr%2Fjkps%2FdownloadPdf.asp%3Farticleuid%3D%257B77FA91F1-6145-4890-9037-FC0F7BAA8B48%257D&ei=vCWIVZPVGuj-ywOY-aWwAQ&usg=AFQjCNEMhZH14jR4Lyepx_uRbsjOee5sKw
Hi
A loss factor can refer to a multitude of things in dynamics. Most often, it refers to the conversion of vibration energy into heat. This process is (nearly) irreversible, which is why the energy is thought of as 'lost', hence, the phrase a damping loss factor.
You find a discussion on the topic of damping here
http://qringtech.com/2014/06/22/designed-damping-types-mechanisms-application-limitation/
Sincerely
Claes
Hi
I advice you to see these documents. You will find what you need.
I hope that I helped you, let us know if you have another questions or you need more details.
Best regards
http://files.hanser.de/hanser/docs/20041012_2411215439-82_3-446-22673-7.pdf
http://sem-proceedings.com/16i/sem.org-IMAC-XVI-16th-Int-161802-The-Loss-Factor-as-Measure-Mechanical-Damping.pdf
The loss factor could be linked to damping ratio i.e. dissipation energy!
Loss factor represents damping charactristics when using histeretic damping model instead the viscous damping model
Loss factor or specific damping factor is defined as the energy dissipated per radian to the peak potential energy is the cycle. This is a very useful method to compare the damping capacity of different materials. It has to be pointed out that this method is used for materials with very light damping. For more information, please have a look at the book "Dynamic of Structure", written by Anil K Chopra.
Is loss Factor a property of the material ? - ResearchGate. Available from: https://www.researchgate.net/post/Is_loss_Factor_a_property_of_the_material#56e4b824ed99e1961120368f [accessed Mar 13, 2016].
Hai, Is there a relation between loss factor and modal damping
Yes, but not direct.
Loss factor is a material characteristic (usually know as Tangent of delta for those working with polymers and often defined by \eta symbol).
Modal damping is a characteristic of the response of a damped dynamic system when represented by a modal model (eigenvalues/natural frequencies vector, eigenvectors/mode shapes matrix, and modal damping vector).
If the materials of the dynamic system have a large loss factor, then the modal damping vector representing the response of the system will have larger values and the frequency response model will present a large damping effect.
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