## On this page

  

 

 # Material

 Last update: 16.07.2026 

<a id="compolyx.Material"></a>

### *class* compolyx.Material(graph, obj, parent=None)

Represents a material.

Provides access to all material properties defined in the loaded finite element model.

### Access

```pycon
>>> import compolyx
>>> db = compolyx.DB()
>>> model = db.models['class40.1']
>>> materials = model.material_data.materials
>>> mat_UD300 = materials['UD300_GLAS']
>>> print mat_UD300.property_names

```

\[‘density’, ‘engineering\_constants’, ‘larc\_constants’, ‘puck\_constants’, ‘strain\_limits’, ‘stress\_limits’, ‘thermal\_expansion\_coefficients’, ‘tsai\_wu\_constants’, ‘woven\_characterization’, ‘woven\_puck\_constants\_1’, ‘woven\_puck\_constants\_2’, ‘woven\_stress\_limits\_1’, ‘woven\_stress\_limits\_2’\]

```pycon
>>> property_set_eng_const = mat_UD300['engineering_constants']

```

### Attributes

NameDescription[`Material.active`](compolyx.Material.active.md#compolyx.Material.active)Active status of the object.[`Material.active_properties`](compolyx.Material.active_properties.md#compolyx.Material.active_properties)List of the active properties for the underlying material.[`Material.enabled`](compolyx.Material.enabled.md#compolyx.Material.enabled)Indicates whether the object is enabled.[`Material.ext_id`](compolyx.Material.ext_id.md#compolyx.Material.ext_id)ID of corresponding Material in external source.[`Material.id`](compolyx.Material.id.md#compolyx.Material.id)ID of the object.[`Material.is_constant`](compolyx.Material.is_constant.md#compolyx.Material.is_constant)True if engineering constants are constant.[`Material.is_dict_item`](compolyx.Material.is_dict_item.md#compolyx.Material.is_dict_item)Indicates whether the object is an item in a dictionary.[`Material.is_isotropic`](compolyx.Material.is_isotropic.md#compolyx.Material.is_isotropic)True if ply\_type is isotropic or isotropic\_homogeneous\_core.[`Material.is_list_item`](compolyx.Material.is_list_item.md#compolyx.Material.is_list_item)Indicates whether the object is an item of a list.[`Material.link_path`](compolyx.Material.link_path.md#compolyx.Material.link_path)Root path of the current node in the tree for links to this object.[`Material.locked`](compolyx.Material.locked.md#compolyx.Material.locked)Material is generated from an external source and cannot be changed.[`Material.name`](compolyx.Material.name.md#compolyx.Material.name)Name of the object.[`Material.parent`](compolyx.Material.parent.md#compolyx.Material.parent)Parent object in the tree.[`Material.ply_type`](compolyx.Material.ply_type.md#compolyx.Material.ply_type)Ply type.[`Material.property_names`](compolyx.Material.property_names.md#compolyx.Material.property_names)List with all available property keys.[`Material.root_path`](compolyx.Material.root_path.md#compolyx.Material.root_path)Root path of the current node in the tree.[`Material.status`](compolyx.Material.status.md#compolyx.Material.status)Status of the object.[`Material.status_changed`](compolyx.Material.status_changed.md#compolyx.Material.status_changed)Boolean flag which is set to true in C++ when up-to-date status of object changes.[`Material.uid`](compolyx.Material.uid.md#compolyx.Material.uid)UID of the object.[`Material.vertex`](compolyx.Material.vertex.md#compolyx.Material.vertex)Raises an error if the object has been removed from the graph.### Methods

NameDescription[`Material.create_property_set`](compolyx.Material.create_property_set.md#compolyx.Material.create_property_set)(property\_name, ...)Function to create a specific property set.[`Material.delete_property_set`](compolyx.Material.delete_property_set.md#compolyx.Material.delete_property_set)(property\_name)Function to delete a specific property set.[`Material.find_parent`](compolyx.Material.find_parent.md#compolyx.Material.find_parent)(type)Steps up the tree and returns the first parent with given type.[`Material.obj_exists`](compolyx.Material.obj_exists.md#compolyx.Material.obj_exists)()Checks if \_\_obj still references the c++ object (has not been reset to None by self.\_delete) and exists in the graph.[`Material.serialize`](compolyx.Material.serialize.md#compolyx.Material.serialize)()Serialize to Python string.[`Material.serialize_name_and_id`](compolyx.Material.serialize_name_and_id.md#compolyx.Material.serialize_name_and_id)()Serializes the name and ID.[`Material.update`](compolyx.Material.update.md#compolyx.Material.update)()[`Material.visit`](compolyx.Material.visit.md#compolyx.Material.visit)(visitor)Walk through the tree and let the visitor perform action on every descendant node.