The front Class

The front class holds information about rupture time output. Rupture times are found by recording the earliest time at which a given field (slip or slip rate) exceeds a threshold value.

An instance of front is automatically generated for all problems, so the user should not use this directly, but rather modify the front for the problem using the provided interfaces in the problem class.

class fdfault.front

Class holding information regarding rupture front output.

Relevant internal variables include:

Variables:

• out – Boolean indicating if front output is on/off (Default False)
• field – Field to use for determining rupture time (rupture time is earliest time this field exceeds the threshold). Default is 'V' (scalar slip velocity), can also be 'U' (slip).
• value – Threshold value (default is 0.001)

__init__()

Initializes rupture front

Create a new instance of the front class with default properties (output is False, output field is 'V', and output threshold value is 0.001).

Returns:New rupture front class: Return type:front

get_field()

Returns front field

Returns:Rupture front field (string, “U” denotes slip and “V” denotes slip velocity) Return type:str

get_output()

Returns status of front output (boolean)

Returns:Status of front output Return type:bool

get_value()

Returns front threshold value. Front output is the earliest time at which the given field exceeds this value

Returns:Threshold value for rupture front output Return type:float

set_field(field)

Sets rupture front field

Sets new value of rupture front field field. field must be a string (slip ('U') or slip velocity ('V')). Other choices will raise an error.

Parameters:field (str) – New rupture front field Returns:None

set_output(newoutput)

Sets front output to be on or off

Sets rupture front output to be the specified value (boolean). Will raise an error if the provided value cannot be converted into a boolean.

Parameters:newoutput (bool) – New value of output Returns:None

set_value(value)

Sets front threshold value

Changes value of rupture front threshold. The rupture time is the earliest time at which the chosen field exceeds this value. value is the new value (must be a positive number).

Parameters:value (float) – New values of the threshold for rupture front times. Returns:None

write_input(f)

Writes front information to input file

Method writes the current state of a front to an input file.

Input argument the input file f (file handle).

Parameters:f (file) – file handle for text input file Returns:None