25 skills found
ipc-sim / IPCIncremental Potential Contact (IPC) is for robust and accurate time stepping of nonlinear elastodynamics. IPC guarantees intersection- and inversion-free trajectories regardless of materials, time-step sizes, velocities, or deformation severity.
TLCFEM / SuanPan🧮 An Open Source, Parallel and Heterogeneous Finite Element Analysis Framework
JuliaDynamics / NonlinearDynamicsComplexSystemsCourseMaterial for a full course on applied nonlinear dynamics, nonlinear timeseries analysis, and complex systems, in Julia
bessagroup / CRATECRATE: Accurate and efficient clustering-based nonlinear analysis of heterogeneous materials through computational homogenization
liyuesolo / NeuralMetamaterialNetworkCpp and python code for our SIGGRPAH Asia 2023 paper Neural Metamaterial Network for Nonlinear Material Design
XJTU-Zhou-group / Calculating Band Gaps Of Nonlinear Mechanical MetamaterialsBand gaps of are intrinsic physical properties of periodic structures, for example, mechanical metamaterials or phononic crystals, which indicate attenuation of wave propagation within a specific frequency range. Band gap calculation of mechanical metamaterials is realized via discretizing a representative volume element (RVE) and imposing a complex-valued Bloch wave boundary conditions. It is highly desirable to implement Bloch wave analysis in real-valued commercial finite element softwares. We present and detail an ABAQUS and Python implementation of Bloch wave analysis. 2D soft as well 3D hard mechanical metamaterials are chosen as numerical examples. Material and geometric nonlinearities are tackled properly and the effects of pre-strains are explored. Our numerical results are validated either by similar results reported in literature or by our experimental measurement.
vfceball / RC FIAPThe open virtual platform RC-FIAP, developed in Python, with the analysis library OpenSeesPy at its core, is presented to evaluate the seismic vulnerability of different archetypes of reinforced concrete frames, including ACI318 compliant structures. The platform is a tool for educational performance-based earthquake engineering, including research capabilities for risk assessment. In the first phase of the platform presented here, the fragility assessment is carried in a few seconds from conception to pushover analysis, including design and construction of the nonlinear model. Input variables include number of stories and spans, material properties (steel, concrete), dimensioning of beams and columns, gravity loading, seismic design parameters per ASCE 7-16, and choice of design detailing per ACI318-19. The GUI-based platform allows studying the impact of these variables in the performance of frames, by including ASCE/SEI 41-17 acceptance criteria.
hariprasadr1hp / FEM MatlabA Matlab program which solves a static nonlinear FEM problem with linear shape functions, for an ideal elastic-plastic material
nonlinearfun / CU BENsCU-BEN serial version: geometric and material nonlinear static and transient dynamic structural analysis/ linear acoustic fluid structure interaction
andreabellavia / RCSplinesSoftware material for estimating and presenting nonlinear associations and interactions with Restricted Cubic Splines
Sharbel99 / Nonlinear Finite Element Code For 3D Hyperelastic ProblemA program for solving nonlinear boundary value problems in solid mechanics with nonlinear material behaviour and large deformation.
bcdanilo / NonLinear PolyTopPolyTop considering nonlinear material models
ameliesas / NonlinearRoutineImplementation of nonlinear material properties in a linear finite element solver
kmegahed / Material Nonlinearity Concrete Damage PlasticityNo description available
kamilazdybal / Nonlinear DecodingCode and materials for the paper "Improving reduced-order models through nonlinear decoding of projection-dependent outputs".
jpdomann / Nonlinear Constitutive ModelingNonlinear constitutive modeling of a magnetic material using Boltzman statistics
solids4foam / MultiscaleHierarchical RVE-based multiscale modeling of nonlinear heterogeneous materials using the finite volume method
PWierna / FEM3D 1stOrder RVEBVPA Finite Element code for the solution of 3D Boundary Value Problems of Micro/Meso-Cells, within the framework of 1st Order Computational Homogenization Theory and considering material-nonlinear constitutive behaviors.
Pranov1984 / Prediction Of Cement Compressive Strength Using Stacked Ensemble ModellingThe actual concrete compressive strength (MPa) for a given mixture under aspecific age (days) was determined from laboratory. Data is in raw form (not scaled).The data has 8 quantitative input variables, and 1 quantitative output variable, and 1030 instances (observations).Context:Concrete is the most important material in civil engineering. The concrete compressive strength is a highly nonlinear function of age and ingredients. These ingredients include cement, blast furnace slag, fly ash, water, superplasticizer, coarse aggregate, and fine aggregate. Summary of steps taken and performance achieved: Multiple models with different levels of complexity were attempted. The dependent and independent variables seem to have a nonlinear relationship as the performance of models improved with increasing complexity. MAPE was selected as the evaluation metric.Regularization, feature selection and hyper-parameter tuning was employed to improve the model performance. The models attempted are Linear Regression with no regularization Ridge and Lasso Gradient Boosting Random Forest XGboost Support Vector Machine Stacking - ensemble of the best estimators of the above tuned models with a meta regressor (i.e. Ridge) which gave the best result (MAPE of less than 10)
davidemelozzi / Analysis Of A Spread Mooring SystemThis task's aim is to create a preliminary design of the mooring system. It will employ two different materials in the same cable and water depth to examine how the combination of both influences stress. Furthermore, in this research, it will be determined how vessel movement affects mooring cable stress and the ratio of maximum motion to water depth. Part 2's goal is to compute the mooring-induced damping coefficients caused by surge movements of the moored vessel. The mooring system is studied, which consists of the FPSO being moored to the bottom with two mooring lines (chain-Polyester-chain). Mooring induced damping is calculated using the energy wasted by a mooring line owing to floating body motion. The mooring line's nonlinear dynamic analysis is done in time domain using the DNV program DeepC. The dynamic responses of the mooring line will be calculated using the floating body's wave drift oscillation and wave frequency oscillation.
