Some rendering work for a friend

A small rendering projects for a friend of mine's hotel. That he was face lifting his hotel in Mutrah, Sultanate of Oman. Place called Mutrah Hotel which is the oldest hotel in Sultanate of Oman. Face lift project was only phase of the many that will be continued on the future. Rework of the hotel has been done around the lobby and restaurant exteriors.

WIP Render evening

19:00 15th June evening time in Muscat

11:00 15th June morning time in Muscat (filtered)

10:00 15th June morning time in Muscat

18:40 15th June evening time in Muscat

10:00 15th June morning time in Muscat (higher iso number)

P49 Main Frame FEA Update and Rear Frame Preliminary Data

 Main Frame Update:

Comparison of old and updated chassis (deflection wise) under 30000 Nm (22126.86 lbf*ft) torsional load (below). Previous deflection value in degree was 1.08 degrees, now it is 0.861 degree and there is no weight gain on the chassis a part from modification of the beams and some additional mini gussets on some weld points. Current calculated torsional stiffness is ~34480 Nm/degree, previous value was 27540Nm/degree (~20% stiffer chassis). Stress concentration on chassis beams and welds are also less.

Updated chassis from March 2015 (tested in May 2015)

Chassis from late 2014

 Rear Frame 1st FEA Test Obtained Data:

Another FEA study for the rear frame which was done in Autodesk Inventor, Rear Frame is quite similar to Galmer GT rear frame (due to same power and gear train) with some differences and this one is symmetric. Torque range varies from 15000Nm to 80000Nm and torsional stiffness 79225.5221 Nm/degree which is mathematically achievable but failure occurs on some beams (eg. gearbox frame diagonal brace) beyond 50000Nm Torsional load. yet model is not perfect there are some residual stresses due to CAD design of the beam which the don't contact perfectly. calculation was done with 847676 elements (1635684 nodes). Detail of beams increases close to where torsional load was applied. Calculation to about 27 hours on incremental loads and computer crashed 5 times. otherwise calculation would have been less. Material used: 4130 Chrome-Molybdenum alloy steel which has a yield point at 460 MPa.

Safety factor map

Safety factor map

Von Mises stresses

Von Mises stresses

Resultant displacement

 

Displacement in Y direction

P49 Chassis as 3-22-2015

Chassis for FEA is almost complete as of 3-22-2015. Remaining job for the my thesis are FEA test of the complete chassis and CFD test of the preliminary bodywork. I have been trying to find a license for a CFD program I wasn't able to but then suddenly I have found SimScale (https://simscale.com/_en/), a cloud based analysis program which offers 1000 hours/year educational license, perfect for my thesis project since I have been living on fumes of my past savings.

My Target, till May 2015, is to finish the FEA test of the Complete chassis and at least complete 2 CFD test for bodywork in order to finish my thesis project then I can concentrate on the car more after I graduate from the university. Yet there are lots of things to do such as suspensions, uprights, rear trans-axle (which is probably going to be attached to Galmer designed rear hub). So far I have been progressing really slow due to real life conditions, going back to study from work life definitely drains my economy and couple when you made couple bad deals and don't get paid, you end up wasting time (in this case 2 months) and money.

Additional notes on chassis: weight so far is 112.3 kg, survival cell torsional rigidity is 27540 N-m/degree (earlier version had 25430N-m/degree), roll cage compiles with FIA safety standards and maximum deflection is not more than 9 mm on roll cage test according to FIA Appendix J to the International Sporting Code - Article 253 Safety Equipment 2015, FIA Appendix K to the International Sporting Code 2015. Soon I will be releasing more data on the car April will be a really busy month for me with exams and a mandatory medical examination which is basically 15 days of wasted time.

P49 more renderings

Final batch of P49 renderings of the early preliminary bodywork.

P49 Version 1; Preview Renderings

Some Preview Renderings of P49 Version 1

P49 Preliminary design tchnical sketches

P49 Technical Sketch

First version of P49 and will appear on my thesis project as it is.

P49 Preliminary Renderings

It is still a work in progress but I am close to complete the general design of the car. Next comes the chassis completion probably in next 2 months time. I will be running some CFD test on the bodywork I have so far 3 different models and 4 different rear wings to try.