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Mostafa-Nakhaei / PyMastic

Multi-layer Elastic Program in Python
Apache License 2.0
15 stars 7 forks source link

Axel road load #2

Open crfaccin opened 3 years ago

crfaccin commented 3 years ago

Dear Mostafa, i didn't understand how the axel road load is consired. Can you help me?

Mostafa-Nakhaei commented 3 years ago

Hi, there is no axle load. The program only take into account the single tire as the original method developed based on a single tire.

PeteTam-js commented 1 year ago

Dear Mostafa, i didn't understand how the axel road load is consired. Can you help me?

**Here you go @crfaccin : If 18 kips (80kN) is the axle load for single axle single tire configuration, then the load on the each tire is 9 kips (40 kN).

If the tire pressure is 80 psi (552 kPa), and assumed that the contact area between the tire and pavement surface is circular, then the circular contact area =9000 lb/80 psi = 112.5 sq in. = the circle with the radius 6 in (150 mm).

Then, you will use q = 80 (note that it is pressure in psi, not load @Mostafa-Nakhaei - you may update this ) and a= 6 (radius in inch) in the code**