KOKO\Mimi
87 lines
3.3 KiB
C++
87 lines
3.3 KiB
C++
#ifndef FESA_ELEMENTS_NONLINEAR_MITC4_SHELL_H_
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#define FESA_ELEMENTS_NONLINEAR_MITC4_SHELL_H_
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#include <array>
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#include <string>
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#include "fesa/core/status.h"
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#include "fesa/elements/mitc4_shell.h"
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#include "fesa/math/matrix.h"
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#include "fesa/math/vector3.h"
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#include "fesa/model/model_types.h"
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#include "fesa/results/result_records.h"
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namespace fesa {
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/// @brief Stores one four-node nonlinear shell trial in global coordinates.
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struct NonlinearMitc4TrialDofs {
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std::array<Vector3, 4> displacement;
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std::array<Vector3, 4> rotation_vector;
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};
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/// @brief Stores physical shell recovery at one midsurface Gauss location.
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struct NonlinearMitc4RecoveryPoint {
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ShellMidsurfaceLocation location;
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std::array<double, 2> natural_coordinates;
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Mitc4LocalFrame local_frame;
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std::array<double, 8> generalized_strain;
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std::array<double, 8> section_resultant;
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std::array<ShellSectionStressRow, 3> stress;
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};
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/// @brief Stores the fixed four-row nonlinear physical recovery inventory.
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struct NonlinearMitc4Recovery {
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std::array<NonlinearMitc4RecoveryPoint, 4> gauss_points;
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double physical_strain_energy;
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};
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/// @brief Evaluates fixed-reference Total Lagrangian MITC4 kinematics.
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/// @note This class owns no mutable trial or accepted analysis state.
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class NonlinearMitc4Shell {
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public:
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/// @brief Creates one checked nonlinear MITC4 element kinematics object.
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/// @param nodes Four non-owning source nodes in natural source order.
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/// @param initial_frames Matching fixed initial node frames in source order.
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/// @param section Centered positive-thickness shell section.
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/// @param material Homogeneous isotropic material with shell-valid constants.
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/// @return A checked evaluator or a structured model failure.
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static Result<NonlinearMitc4Shell> Create(
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std::array<const Node*, 4> nodes,
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std::array<ShellNodeInitialFrame, 4> initial_frames,
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const ShellSection& section, const LinearElasticMaterial& material);
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/// @brief Evaluates trial physical kinematics and fixed recovery rows.
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/// @param trial Global nodal translation and fixed-global rotation vectors.
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/// @return Physical recovery or a fail-closed trial diagnostic.
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[[nodiscard]] Result<NonlinearMitc4Recovery> EvaluateKinematics(
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const NonlinearMitc4TrialDofs& trial) const;
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/// @brief Recovers the same physical quantities for one complete trial.
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/// @param trial Global nodal translation and fixed-global rotation vectors.
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/// @return Four ordered Gauss rows without nodal stress projection.
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[[nodiscard]] Result<NonlinearMitc4Recovery> RecoverState(
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const NonlinearMitc4TrialDofs& trial) const;
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private:
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/// @brief Retains validated fixed-reference data without analysis ownership.
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NonlinearMitc4Shell(std::array<Vector3, 4> coordinates,
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std::array<Matrix, 4> initial_frames,
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std::array<Vector3, 4> initial_directors,
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double thickness, double youngs_modulus,
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double poisson_ratio, SourceLocation source_location,
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std::string identity);
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std::array<Vector3, 4> coordinates_;
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std::array<Matrix, 4> initial_frames_;
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std::array<Vector3, 4> initial_directors_;
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double thickness_;
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double youngs_modulus_;
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double poisson_ratio_;
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SourceLocation source_location_;
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std::string identity_;
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};
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} // namespace fesa
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#endif // FESA_ELEMENTS_NONLINEAR_MITC4_SHELL_H_
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