Tomas S. Profile

5,0

(1 avaliação)

Você está agora seguindo

Erro seguindo usuário.

Esse usuários não permite que o sigam.

Você já está seguindo esse usuário.

Seu plano permite apenas 0 seguidas. Aprimore-o aqui.

Deixou de seguir com sucesso

Ocorreu um erro ao deixar de seguir o usuário.

Você recomendou com sucesso

Ocorreu um erro ao recomendar o usuário.

Algo deu errado. Por favor, atualize a página e tente novamente.

E-mail verificado com sucesso

$40 USD / hora

aalborg,

denmark

$40 USD / hora

Atualmente, está 1:03 AM aqui

Ingressou em setembro 24, 2006

0 Recomendações

Tomas S.

@sabaz

5,0

(1 avaliação)

1,9

100%

$40 USD / hora

aalborg,

denmark

$40 USD / hora

100%

Trabalhos Concluídos

100%

Dentro do Orçamento

100%

No Prazo

Não se aplica

Taxa de Recontratação

Civil engineering Post Doc - with extreme ambition

My day job is "egineer for unique structures". A consultant. I design various things based on various standards. Things like 15t lifting winches, elevator shafts, frames, foundations, heavy lifting truck attachments...It feels too easy... Apparently I'm very good at it - a one man band engineering department... doing alone in 2 weeks, what a team of 3 fails to do in 3 months. All of the things I've made so far - work VERY good in real life... 14 years without fails to find a solution. So, I come here once in a while find extra work. 3D CAD work is just... fun.

Ver todos CAD/CAM Designers em Denmark

Contate Tomas S. sobre seu trabalho

Faça login para discutir quaisquer detalhes via chat.

Portfólio

ASTM allows to certify them with nothing more than pressure testing. Which is great, because using numerical simulations I can make them extremely reliable. Within all the safety factors ASTM and Eurocodes ask for.

High pressure barrel

Always wanted to test a jet engine / turbine propeller. Was expecting it to hold near 12k rpm... It seems, if made from titanium alloy, it could hold up to 120000 rpm.
Still need to add pressure, maybe temperature, but... looks pretty cool already. Just the centripetal force in this one, but still interesting

Jet engine components

Wood is a crazy material. It's a polimer. It behaves differently depending on which direction it's loaded. It acts like a sandwich of thin alluminum plates glued with soft ruppber. Very strong when pulled and compressed along the grain. Very soft when the grain is squeezed together.

It's not too hard to model, though ir requires advanced simulation tools. Here's an example :)

Wood simulations. Advanced Orthotropic 3D

An example of overloaded locking mechanism, that holds a linear guide rod in place.
The plate is held by two bolts, pre-tensioned to 30kN force. And the plate is loaded in two direction. During loading it gets permanently deformed slightly. But the deformation is safe. The joint doesn't fall apart. The joint is failsafe.

Also, fatigue tests were done on the part. And it shows only surface damage. There is enough metal working within the endurance limits to survive near infinite loading cycles :)

Sliding rod locking plate - plastic simulation

A fun example of components interacting. LEGO components, test of the strength of ABS plastic.

There is no limit how many components can be simulated at once, as they interact with each other. And no limits on complexity of the geometry.

Often times simple simulations are enough. But if you wish to know how the part will "fail" in detail - then the failure will require advanced simulations.

So, that's a simple explanation. Most things are designed to never cross "maximum strength". That is achieved using simple FEM (linear elastic).

If you wish to design something that will fail safely (like a roll cage, or some sacrificial piece, safety feature), then you will need more advanced FEM, with plasticity, thermal gradients, fatigue, etc... all available :)

Advanced simulations

It can be quite a challange to model heat distribution.

Only "steady state" - is fast and easy. If you have a constant temperature on input and output, it is plausible to quickly estimate how the temperature will move...

But as soon as your input is fluctuating - you enter a temporal domain. Suddenly, heat storage and heat distribution kicks into action. And the simulation becomes long and relatively complicated.

I can take it to the next level for you if you'd like to. I can apply fluctuating temperatures on your components - multiple components interacting with each other. Then look at how the components expand / contract. And how that can change their dimensions, loads. Fatigue... permanent deformations due to temperature, etc...

Anything from heat distribution within molds for plastic injection - to heat storage in geothermal setups. Cooling of microchips... etc... etc... etc...

Thermal properties

Avaliações

Mudanças salvas

Mostrando 1 - 1 de 1 avaliações

Filtrar avaliações por:

5,0

€83,00 EUR

Tachometer scale's irregular shape as DXF

Superfast and very professional, superb contact. Easy to communicate the details, until everything was done well.

CAD/CAM

Computer Graphics

Reiner H.

@ReinerHil

•

há 1 ano

Experiência

TopTeam A/S

out. 2022 - Atual

A consultant, for unique structures. I have a Post Doc in engineering. Meaning - a deep understanding of simulations, modelling of physical material properties. Which empowers to find unique solutions for a wide range of problems. Doing 3D drawings and technical sketches. Designing things according to standards. Etc.

Aalborg University

jan. 2018 - out. 2022 (4 anos, 9 meses)

While "studying" I was working. They hired me in the lab. Designed and built heavy equipment. Did maintanance and operated of hydraulics. Built, designed and coded 3t tobots, that push with 20t force... The diploma says "geotechnician", ignoring I built the very equipment used for testing foundation strength... I threw my thesis into the trashcan on my way out. And baught 3D CAD software. For that's what I "really did", "truly learned".