M = 2 #vehicle mass [Mg]
L = 10e3 # beam length [mm]
w1 = 3.5e3 #wheelbase length [mm]
w2 = 2.5e3 #wheelbase B [mm]
g = 9810 #mm/s^2

H = 250 #mm
B = 500 #mm

F = M * g / 4
a = (L - w1)/2

safety_factor = 3

no_mat = {"name": "Air", "units": "MPa-mm-Mg", "type": "None", "fiber": "None",
     "Vf": 1e-10, "rho": 1e-10,
     "description": "Air",
     "E1": 1e-10, "E2": 1e-10, "v12": 1e-10, "v23": 1e-10, "G12": 1e-10,
     "a1": 1e-10, "a2": 1e-10,
     "XT": 1e10, "YT": 1e10, "XC": 1e10, "YC": 1e10,
     "S12": 1e-10, "S23": 1e-10, "f12": 1e-10}

m = {"name": "Carbon/Epoxy(a)", "units": "MPa-mm-Mg", "type": "UD", "fiber": "Carbon",
     "Vf": 0.50, "rho": 1600E-12,
     "description": "UDFC Carbon/Epoxy",
     "E1": 130000, "E2": 10000, "v12": 0.28, "v23": 0.5, "G12": 4500,
     "a1": 8e-06, "a2": 25e-06,
     "XT": 1800, "YT": 40, "XC": 1200, "YC": 180,
     "S12": 70, "S23": 40}