寻求支持3D弹性膜单元的C++开源FEM库（Windows平台）

Hey Amir, great question! Let’s dive into reliable open-source C++ options that meet all your requirements—support for 3D curved meshes, parameterizable elastic membrane elements (with thickness/material properties), Windows compatibility, and easy integration into your existing codebase:

1. LibMesh #

• Why it fits: LibMesh is a mature, modular C++ FEM library with first-class Windows support (buildable via CMake + Visual Studio). It includes dedicated 3D membrane elements designed for curved surfaces, which let you directly parameterize thickness and material properties (Young’s modulus, Poisson’s ratio) as field variables or constants.
• Integration notes: You can define curved meshes using its mesh generation utilities or import external mesh formats (like VTK, GMsh). Membrane units are instantiated via explicit element types (e.g., MEMBRANE3D), and material parameters are passed through its material property system—perfect for embedding into your existing C++ workflow.
• Bonus: It has extensive documentation and an active community, so you’ll find examples of membrane element usage in structural mechanics benchmarks.

2. Deal.II #

• Why it fits: While you noted fenics-shells doesn’t meet your needs, Deal.II (the core library behind FEniCS) offers far more flexibility for custom element implementation. It supports 3D curved meshes via its Manifold class, and you can easily implement a parameterized 3D elastic membrane element using its FEValues framework to compute stiffness matrices with thickness-dependent terms.
• Integration notes: Deal.II builds smoothly on Windows with CMake, and its C++ API is designed for seamless integration into existing codebases. You can define material properties as user-defined functions or constants, and leverage its parallel computing support if you need to scale up later.
• Bonus: The official tutorials include structural mechanics examples, which you can adapt to your membrane element requirements.

3. OpenSees #

• Why it fits: OpenSees is a C++-based open-source framework focused on structural engineering, with robust Windows support (pre-built binaries available, or build from source via CMake). It includes specialized 3D membrane elements (e.g., ShellMembrane variants) that support parameterizable thickness and linear elastic material properties, optimized for curved surface meshes.
• Integration notes: OpenSees can be used as a library in your C++ code—you can initialize the solver, define your mesh, set up membrane elements with custom parameters, and run simulations directly from your application. It’s particularly well-suited for structural mechanics use cases like yours.

Quick Implementation Tips #

• For all libraries, start with a simple benchmark (e.g., a stretched curved membrane with known analytical solution) to validate your parameterized thickness and material settings.
• Use GMsh to generate high-quality 3D curved meshes, which all these libraries can import directly.

内容的提问来源于stack exchange，提问作者AmirB