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Delete simulators/fenics_simulation.py
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simulators/fenics_simulation.py
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from fenics import *
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import numpy as np
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def run_fenics_simulation(simulation_type, **kwargs):
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"""
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Run FEniCS simulation for the selected use case.
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Parameters:
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simulation_type (str): 'plate' or 'beam'.
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kwargs: Input parameters such as length, width, thickness, force/load.
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Returns:
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stress (float): Calculated maximum stress (approx).
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deformation (float): Total deformation (approx).
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"""
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# Mesh setup
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if simulation_type == "plate":
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length, width, thickness = kwargs["length"], kwargs["width"], kwargs["thickness"]
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mesh = BoxMesh(Point(0, 0, 0), Point(length, width, thickness), 10, 10, 2)
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load = kwargs["force"]
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elif simulation_type == "beam":
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length, width, thickness = kwargs["length"], kwargs["width"], kwargs["thickness"]
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mesh = BoxMesh(Point(0, 0, 0), Point(length, width, thickness), 10, 10, 2)
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load = kwargs["load"]
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else:
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raise ValueError("Invalid simulation type selected.")
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# Function space
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V = VectorFunctionSpace(mesh, "P", 1)
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# Trial and test functions
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u = TrialFunction(V)
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v = TestFunction(V)
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# Material properties
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E, nu = 2e11, 0.3 # Elastic modulus and Poisson's ratio
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mu = E / (2.0 * (1.0 + nu))
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lmbda = E * nu / ((1.0 + nu) * (1.0 - 2.0 * nu))
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# Stress-strain relationship
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def sigma(v):
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return lmbda * nabla_div(v) * Identity(3) + 2 * mu * sym(grad(v))
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# Load
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f = Constant((-load, 0, 0))
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# Variational form
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a = inner(sigma(u), sym(grad(v))) * dx
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L = dot(f, v) * dx
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# Boundary conditions
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def boundary(x, on_boundary):
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return on_boundary and near(x[0], 0)
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bc = DirichletBC(V, Constant((0, 0, 0)), boundary)
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# Solve
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u = Function(V)
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solve(a == L, u, bc)
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# Post-processing
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stress = np.max(u.vector().get_local()) # Approximate stress
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deformation = u.vector().norm("l2") # Approximate deformation
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return stress, deformation
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