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angle_style cosine/squared command

Syntax:

angle_style cosine/squared 

Examples:

angle_style cosine/squared
angle_coeff 2*4 75.0 100.0 

Description:

The cosine/squared angle style uses the potential

where theta0 is the equilibrium value of the angle, and K is a prefactor. Note that the usual 1/2 factor is included in K.

The following coefficients must be defined for each angle type via the angle_coeff command as in the example above, or in the data file or restart files read by the read_data or read_restart commands:

Theta0 is specified in degrees, but LAMMPS converts it to radians internally.

Restrictions: none

Related commands:

angle_coeff

Default: none