Micropp

Micropp is a 3-D Finite Element (FEM) code for solving solid mechanics problems for modeling micro-scale effects in composite materials.

The code solve the equilibrium equations at Representative Volume Elements (RVE) to calculate average properties (stresses and constitutive tensors) for multi-scale simulations:

The code is mainly designed to be coupled with codes for modeling with FEM the macro-scale, e.g. a wing of an aircraft.

The code has been ported to GPUs to accelerate the calculation of the micro-scale problems.

Compilation

cmake -B build \
    -DCMAKE_BUILD_TYPE=[Debug|Release] \
    -DENABLE_CUDA=[On|Off] \
    -DENABLE_OPENACC=[On|Off] \
    -DENABLE_OPENMP=[On|Off] \
    -DENABLE_TIMER=[On|Off]

cmake --build build
ctest --test-dir build

Characteristics

1. Works with 3-D structured FE elements problems
2. OpenACC and CUDA (under development in cuda branch) acceleration support for GPUs
3. OpenMP support for multi-core CPUs
4. Solver: Diagonal Preconditioned Conjugate Gradients (DPCG)
5. More than 10 micro-structures patterns and 3 material laws (elastic, damage and plastic)
6. No external libraries are required
7. Native instrumentation to measure performance
8. C and Fortran Wrappers for coupling Micropp with external codes

Performance CPU vs. GPUs

The peformance using the hybrid CPU/GPU execution in notably better than CPU-only:

For hybrid CPU/GPU the parallelization with CUDA has proven better perfomance than OpenACC:

Currently CUDA acceleration only works with some parts of the code and has not been completely integrated.