sfepy.terms.terms_contact module¶

class sfepy.terms.terms_contact.ContactIPCTerm(*args, **kwargs)[source]¶

Contact term based on IPC Toolkit.

This term has a dynamic connectivity of DOFs in its region.

Definition:

$\int_{\Gamma_{c}} \sum_{k \in C} \nabla b(d_k, \ul{u})$

Call signature:

dw_contact_ipc

(material_m, material_k, material_d, material_p, virtual, state)

Arguments:

material_m : $m$
material_k : $k$
material_d : $\hat{d}$
material_p : PSDProjectionMethod
virtual : $\ul{v}$
state : $\ul{u}$

arg_shapes = {'material_d': '.: 1', 'material_k': '.: 1', 'material_m': '.: 1', 'material_p': '.: str', 'state': 'D', 'virtual': ('D', 'state')}¶

arg_types = ('material_m', 'material_k', 'material_d', 'material_p', 'virtual', 'state')¶

call_function(out, fargs)[source]¶

eval_real(shape, fargs, mode='eval', term_mode=None, diff_var=None, **kwargs)[source]¶

static function(out, fun, *args)[source]¶

static function_weak(out, out_cc)[source]¶

geometries = ['3_4', '3_8']¶

get_contact_info(state)[source]¶

get_fargs(avg_mass, stiffness, dhat, spd_projection, virtual, state, mode=None, term_mode=None, diff_var=None, ci=None, **kwargs)[source]¶

integration = 'facet'¶

name = 'dw_contact_ipc'¶

class sfepy.terms.terms_contact.ContactInfo(region, integral, geo, state)[source]¶

Various contact-related data of contact terms.

update(xx)[source]¶: A dict-like update for Struct attributes.

class sfepy.terms.terms_contact.ContactTerm(*args, **kwargs)[source]¶

Contact term with a penalty function.

The penalty function is defined as $\varepsilon_N \langle g_N(\ul{u}) \rangle$ , where $\varepsilon_N$ is the normal penalty parameter and $\langle g_N(\ul{u}) \rangle$ are the Macaulay’s brackets of the gap function $g_N(\ul{u})$ .