Search found 407 matches

Go to advanced search

by Mark Szlazak
Sat Nov 30, 2019 11:15 pm
Forum: Assembly
Topic: Reimplementing constraint solver [all solvers implemented]
Replies: 49
Views: 2935

Re: Reimplementing constraint solver [BFGS solver is up!]

I have this one. Might help. https://drive.google.com/file/d/1Z_rX5Eci1E3PHQXJWbswlOtjp_RH63MU Thank you, now I got it. Unfortunately, it isn't the exact book I was after. The book I found was "Numerical Optimization" by Jorge Nocedal and Stephen J. Wright. The one you sent me is "Numerical-Methods...
by Mark Szlazak
Sat Nov 30, 2019 6:29 am
Forum: Assembly
Topic: Reimplementing constraint solver [all solvers implemented]
Replies: 49
Views: 2935

Re: Reimplementing constraint solver [dogleg solver is up!]

back in the days when I implemented dogleg and LM solvers I closely followed a paper (or excerpt of a bock, not sure anymore). This one, maybe? https://link.springer.com/chapter/10.1007%2F0-387-22742-3_18 I have this one. Might help. https://drive.google.com/file/d/1Z_rX5Eci1E3PHQXJWbswlOtjp_RH63MU
by Mark Szlazak
Tue Nov 05, 2019 9:37 pm
Forum: Assembly
Topic: Reimplementing constraint solver [all solvers implemented]
Replies: 49
Views: 2935

Re: Call for team! Reimplementing constraint solver

In case you missed it, Ben Kenwright, the author of the Dual Quaternion papers people have posted, has authored a paper on programming rigid body constraint and physics solvers. Maybe the approaches are similar for constraints solvers alone or they could be made compatible with a future solvers that...
by Mark Szlazak
Thu Oct 31, 2019 9:50 pm
Forum: Developers corner
Topic: Adventure of fixing sketcher solver for large sketches
Replies: 16
Views: 869

Re: Adventure of fixing sketcher solver for large sketches

Back then when I tried to write a 3d solver for assemblies I failed for that very reason: standard numeric solvers are unable to cope with the fact that rotational and transitional degrees of freedom have different sensitivities, a unit change in the parameter leads to to massively different change...
by Mark Szlazak
Mon Aug 19, 2019 11:02 pm
Forum: Announcements & Features
Topic: Merge of Link3 branch into master
Replies: 29
Views: 3450

Re: Merge of Link3 branch into master

Sorry, I know this sounds dumb but is this merge part of FreeCAD 0.19 Daily?
by Mark Szlazak
Sat Aug 17, 2019 9:34 pm
Forum: Announcements & Features
Topic: Merge of Link3 branch into master
Replies: 29
Views: 3450

Re: Merge of Link3 branch into master

Thank you Realthunder, Wmayer and all others involved in this step towards a stronger FreeCAD with an assembly.
by Mark Szlazak
Tue Jul 23, 2019 4:35 pm
Forum: FEM
Topic: FEA for additive manufacturing.
Replies: 24
Views: 1216

Re: FEA for additive manufacturing.

The "Material Point Method" may hold more promise for this type of analysis: Nice! Thanks. Also, I have been in contact with one author from this paper https://www.researchgate.net/publication/322688604_A_Computationally_Efficient_Finite_Element_Framework_to_Simulate_Additive_Manufacturing_Processe...
by Mark Szlazak
Sat Jul 20, 2019 5:52 am
Forum: FEM
Topic: FEA for additive manufacturing.
Replies: 24
Views: 1216

Re: FEA for additive manufacturing.

I send requests to two sources and have received nothing back even after reminders. Maybe something will show up next week but I doubt it.
by Mark Szlazak
Tue Jul 16, 2019 4:19 am
Forum: FEM
Topic: FEA for additive manufacturing.
Replies: 24
Views: 1216

Re: FEA for additive manufacturing.

Not heard back yet but found some recent and relevant papers. https://onlinelibrary.wiley.com/doi/pdf/10.1002/mdp2.28 https://www.researchgate.net/profile/Shiyan_Jayanath/publication/322688604_A_Computationally_Efficient_Finite_Element_Framework_to_Simulate_Additive_Manufacturing_Processes/links/5ba...
by Mark Szlazak
Sat Jul 13, 2019 8:56 pm
Forum: FEM
Topic: FEA for additive manufacturing.
Replies: 24
Views: 1216

Re: FEA for additive manufacturing.

Just try a demo of genoa export the inp file and try it/ share it ... We can see what happens This would have to be done at De Anza Colleges DMT lab in Cupertino or possibly at Hawkridge Systems in San Jose to access their industrial printers. Currently, I am in Canada and will not be able to use t...

Go to advanced search