0003167: FEM - Materials dialogue - Units conversion problem - FreeCAD Tracker

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ID	Project	Category	View Status	Date Submitted	Last Update

0003167	FEM	Bug	public	2017-08-23 08:59	2018-01-04 09:50

Reporter	HoWil	Assigned To	HoWil
Priority	high	Severity	major	Reproducibility	always
Status	closed	Resolution	fixed
Product Version	0.17
Target Version	0.17	Fixed in Version	0.17

Summary	0003167: FEM - Materials dialogue - Units conversion problem
Description	Values change in the dialogue boxes of a FluidMaterial and SolidMaterial in FEM-wb after one confirms with OK. When checking the values in python console (see below) or when reopening the material-dialogue one sees that the values are not the one entered (see also the two screenshots below). Some values are scaled (maybe converted wrongly) others are resetted to e.g. 1m^2/s. A similar but slightly different behavior can be observed with the SolidMaterial dialogue (see steps to reproduce).
Steps To Reproduce	* Open FEM-wb and add an analysis and add a Solid-Material object * Edit the Solid-Material and change the Expansion Coefficient of e.g. Calculix-Stell from 12,00 µm/m/K to 12,5 µm/m/K * presses OK * reopen the dialogue and look for the changed value of 125 µm/m/K.
Additional Information	The values are not only displayed this way... they are also stored as can be seen in the python-console: `App.ActiveDocument.SolidMaterial.Material {'Name': u'CalculiX-Steel', 'Density': u'7850.0 kg/m^3', 'ThermalExpansionCoefficient': u'125.0 um/m/K', 'YoungsModulus': u'21000000.0 kPa', 'Father': u'Metal', 'SpecificHeat': u'590.0 J/kg/K', 'ThermalConductivity': u'43.0 W/m/K', 'PoissonRatio': u'0.32', 'Description': u'Standard steel material for CalculiX sample calculations'}`
Tags	conversion, FEM, material, units

FreeCAD Information

Date Modified	Username	Field	Change
2017-08-23 08:59	HoWil	New Issue
2017-08-23 08:59	HoWil	File Added: FC_units_problem.fcstd
2017-08-23 08:59	HoWil	File Added: Screenshots_material_dialogue.svg.png
2017-08-23 08:59	HoWil	Tag Attached: FEM
2017-08-23 09:01	HoWil	Note Added: 0009996
2017-08-23 09:02	HoWil	Tag Attached: material
2017-08-23 09:02	HoWil	Tag Attached: units
2017-08-23 09:02	HoWil	Tag Attached: conversion
2017-09-04 14:44	HoWil	Note Added: 0010065
2018-01-03 10:38	berndhahnebach	Summary	Materials dialogue - Units conversion problem => FEM: Materials dialogue - Units conversion problem
2018-01-03 10:39	berndhahnebach	Summary	FEM: Materials dialogue - Units conversion problem => FEM - Materials dialogue - Units conversion problem
2018-01-04 09:50	wmayer	Assigned To	=> HoWil
2018-01-04 09:50	wmayer	Status	new => closed
2018-01-04 09:50	wmayer	Resolution	open => fixed
2018-01-04 09:50	wmayer	Fixed in Version	=> 0.17
2018-01-04 09:50	wmayer	Note Added: 0010698