Hertz time (equation reference)

Submitted by clarence91 on Tue, 09/15/2015 - 23:46

Hi,

If possible can anyone provide the reference of hertz time provided in the LIGGGHTS manual?

dt_h = 2.87*(m_eff^2/(r_eff*Y_eff^2*v_max))^0.2.

Thank you.

Forums:

NTT1508 | Thu, 09/24/2015 - 07:14

Hi Omid,

I have looked into Johnson, 1985 but not seen clearly a direct derivation of critical time dt_h there. Do we need to carry out more mathematical implementation based on the Hertz contact theory discussed in such a book to get dt_h ? Pleas clarify.

Thank you,

Regards,

NTT1508 | Mon, 09/28/2015 - 02:31

Thank very much my friends. These documents are very helpful. Sometimes I see a number of unclear equations (without relevant references) in the Manual of LIGGGHTS. This causes a significant trouble for users.