Update app.py

app.py

@@ -1,99 +1,95 @@
-from fenics import *
-import matplotlib.pyplot as plt
-import numpy as np
-import gradio as gr
+import gmsh
+import os
 
-def simulate_beam(length, height, E, nu, force):
+def generate_apdl_script(cad_file, material_e, material_nu, mesh_size, load_value):
     """
-    Simulate a beam under uniform load using FEniCS.
+    Generate an APDL script from a CAD file using GMSH.
     Parameters:
-        length: Length of the beam (m)
-        height: Height of the beam (m)
-        E: Young's modulus (Pa)
-        nu: Poisson's ratio
-        force: Uniform load (N/m^2)
+        cad_file: Path to the CAD file (e.g., STEP, IGES).
+        material_e: Young's modulus (Pa).
+        material_nu: Poisson's ratio.
+        mesh_size: Element size for meshing.
+        load_value: Load to apply (N).
     Returns:
-        Displacement plot and stress plot as PNG images
+        APDL script as a string.
     """
-    # Create mesh and define function space
-    mesh = RectangleMesh(Point(0, 0), Point(length, height), 50, 10)
-    V = VectorFunctionSpace(mesh, "P", 1)
-
-    # Boundary conditions
-    def left_boundary(x, on_boundary):
-        return on_boundary and near(x[0], 0)
-
-    bc = DirichletBC(V, Constant((0, 0)), left_boundary)
-
-    # Define strain and stress
-    def epsilon(u):
-        return sym(grad(u))
-
-    def sigma(u):
-        mu = E / (2 * (1 + nu))
-        lmbda = E * nu / ((1 + nu) * (1 - 2 * nu))
-        return lmbda * div(u) * Identity(2) + 2 * mu * epsilon(u)
-
-    # Define variational problem
-    u = TrialFunction(V)
-    v = TestFunction(V)
-    f = Constant((0, -force))  # Downward force
-    a = inner(sigma(u), epsilon(v)) * dx
-    L = dot(f, v) * dx
-
-    # Solve the problem
-    u = Function(V)
-    solve(a == L, u, bc)
-
-    # Plot displacement
-    displacement_fig, ax1 = plt.subplots()
-    plot(u, mode="displacement", title="Displacement", axes=ax1)
-    ax1.set_xlabel("X")
-    ax1.set_ylabel("Y")
-    plt.tight_layout()
-
-    # Save displacement plot
-    displacement_file = "displacement.png"
-    plt.savefig(displacement_file)
-    plt.close(displacement_fig)
-
-    # Compute stress
-    W = TensorFunctionSpace(mesh, "P", 1)
-    stress = project(sigma(u), W)
-
-    # Plot stress
-    stress_fig, ax2 = plt.subplots()
-    plot(stress, title="Stress", axes=ax2)
-    ax2.set_xlabel("X")
-    ax2.set_ylabel("Y")
-    plt.tight_layout()
-
-    # Save stress plot
-    stress_file = "stress.png"
-    plt.savefig(stress_file)
-    plt.close(stress_fig)
-
-    return displacement_file, stress_file
-
-# Gradio interface
-def run_simulation(length, height, E, nu, force):
-    return simulate_beam(length, height, E, nu, force)
-
-app = gr.Interface(
-    fn=run_simulation,
-    inputs=[
-        gr.Number(label="Beam Length (m)", value=10),
-        gr.Number(label="Beam Height (m)", value=1),
-        gr.Number(label="Young's Modulus (Pa)", value=210e9),
-        gr.Number(label="Poisson's Ratio", value=0.3),
-        gr.Number(label="Force (N/m^2)", value=1e4),
-    ],
-    outputs=[
-        gr.Image(label="Displacement Plot"),
-        gr.Image(label="Stress Plot"),
-    ],
-    live=True,
-)
-
-if __name__ == "__main__":
-    app.launch()
+    # Initialize GMSH
+    gmsh.initialize()
+    gmsh.model.add("CAD_Model")
+    
+    # Import CAD file
+    gmsh.model.occ.importShapes(cad_file)
+    gmsh.model.occ.synchronize()
+    
+    # Generate 3D mesh
+    gmsh.model.mesh.generate(3)
+    
+    # Extract mesh data
+    nodes = gmsh.model.mesh.getNodes()
+    elements = gmsh.model.mesh.getElements()
+    
+    # Start building APDL script
+    apdl_script = """
+/prep7
+! Import geometry from GMSH
+! Material Properties
+mp, ex, 1, {material_e}
+mp, nuxy, 1, {material_nu}
+
+! Mesh settings
+esize, {mesh_size}
+et, 1, solid186
+
+! Generate geometry and mesh
+""".format(material_e=material_e, material_nu=material_nu, mesh_size=mesh_size)
+    
+    # Add nodes to APDL script
+    for node_id, coords in zip(nodes[0], nodes[1].reshape(-1, 3)):
+        apdl_script += "n, {0}, {1}, {2}, {3}\n".format(node_id, *coords)
+    
+    # Add elements to APDL script
+    apdl_script += "! Elements\n"
+    for elem_id, elem_nodes in zip(elements[1][0], elements[2][0]):
+        apdl_script += "e, {0}, {1}, {2}, {3}\n".format(*elem_nodes[:4])  # Example for tetrahedral
+
+    # Boundary conditions and loads
+    apdl_script += """
+! Apply boundary conditions
+nsel, s, loc, z, 0
+d, all, ux, 0
+d, all, uy, 0
+d, all, uz, 0
+
+! Apply loads
+nsel, s, loc, z, max
+f, all, fz, {load_value}
+
+! Solve
+/solu
+antype, static
+solve
+/post1
+set, last
+prnsol, s, comp
+prnsol, u, comp
+/exit
+""".format(load_value=load_value)
+    
+    gmsh.finalize()
+    return apdl_script
+
+# Example usage
+cad_file = "example.step"  # Replace with the actual CAD file
+material_e = 210e9  # Young's modulus in Pascals
+material_nu = 0.3  # Poisson's ratio
+mesh_size = 10  # Mesh element size
+load_value = 1000  # Load in Newtons
+
+apdl_script = generate_apdl_script(cad_file, material_e, material_nu, mesh_size, load_value)
+
+# Save APDL script to a file
+output_file = "generated_apdl.txt"
+with open(output_file, "w") as f:
+    f.write(apdl_script)
+
+print(f"APDL script saved to {output_file}")