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--- visual3d:documentation:modeling:segments:segment_mass [2024/07/16 16:57] – removed sgranger
+++ visual3d:documentation:modeling:segments:segment_mass [2026/06/12 17:55] (current) – Updated link for Dempster's equations to handle. wikisysop
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+====== Segment Mass ======
+Every [[visual3d:documentation:modeling:segments:segment_overview|segment]] in a Visual3D model has a mass, which is used to calculate kinetic quantities.
+=====Default Segment Mass=====
+The default segment masses defined in Visual3D are based on Dempster's 1955 regression equations((Dempster, W. T. (1955). Space requirements of the seated operator, geometrical, kinematic, and mechanical aspects of the body with special reference to the limbs (No. WADCTR55159).)) ([[https://hdl.handle.net/2027.42/4540|link]]) and are:
+^ Segment ^ Mass (% body mass) ^
+|**Foot**          |0.0145|
+|**Shank**         |0.0465|
+|**Thigh**         |0.10  |
+|**Hand**          |0.006 |
+|**Forearm**       |0.016 |
+|**Upper arm**     |0.028 |
+|**Pelvis**        |0.142 |
+|**Thorax/abdomen**|0.355 |
+|**Head**          |0.081 |
+|**Trunk**         |0.497 |
+===== Modifying Segment Mass =====
+Users can modify Segment Mass under the [[visual3d:documentation:modeling:segments:segment_properties|segment properties]] tab in Visual3D's model builder.
+{{:visual3d:documentation:modeling:segments:segmentMass.png}}
+===== See Also =====
+Visual3D also supports the [[visual3d:documentation:definitions:adjusted_zatsiorsky-seluyanov_s_segment_inertia_parameters|Adjusted Zatsiorsky-Seluyanov]] parameters((De Leva, P. (1996). Adjustments to Zatsiorsky-Seluyanov's segment inertia parameters. Journal of biomechanics, 29(9), 1223-1230.)).
+Go back to the [[visual3d:documentation:modeling:segments:segment_overview|Segment Overview]] for more information about segments in Visual3D.