Hi sir,

There is no exact rule for this, but you can start from millisecond orther.

Hi,

As you know Abaqus implicit solver tries to find a suitable time increment for your analysis and after every unsuccessful attempt it reduces the time increment so that the solution may converge (This reduction of the time increment is done up to 5 times and then the divergence occurs)

As Hamidreza has stated above, this is a trial and error process rather than a systematic approach to find the suitable time increment for your model,

You may reduce the initial time increment so that the Abaqus does not get to that 5 time attempt.

Hi Braj,

In case of abaqus/explicit, time step will be computed by abaqus based on characteristic element length and sound speed in the material. Sound speed depends upon modulus of elasticity and density of the material. Thus, if you want to control the timestep in abaqus/explicit, you need to play with element size for a given material. In some quasi-static simulations, density of the material can also be increased to increase the initial time-step.

In case of abaqus/implicit, you can refer to earlier answer by Alireza.

Regards,

Chandrashekhar