ContactForceT (Tangent Contact Force) class

Contents

Description

This is a value heterogeneous super-class for the definition of models for the tangent contact force between elements.

This super-class defines abstract methods that must be implemented in the derived sub-classes:

classdef ContactForceT < matlab.mixin.Heterogeneous

Constant values

    properties (Constant = true, Access = public)
        % Types of model
        SLIDER         = uint8(1);
        SPRING         = uint8(2);
        DASHPOT        = uint8(3);
        SPRING_SLIDER  = uint8(4);
        DASHPOT_SLIDER = uint8(5);
        SDS_LINEAR     = uint8(6);
        SDS_NONLINEAR  = uint8(7);

        % Types of nonlinear SDS formulation
        DD  = uint8(1);
        LTH = uint8(2);
        ZZY = uint8(3);
        TTI = uint8(4);
    end

Public properties

    properties (SetAccess = public, GetAccess = public)
        % Identification
        type uint8 = uint8.empty;   % flag for type of model

        % Contact parameters
        restitution double = double.empty;   % tangent coefficient of restitution

        % Force results
        total_force double = double.empty;   % resulting force vector
    end

Constructor method

    methods
        function this = ContactForceT(type)
            if (nargin > 0)
                this.type = type;
            end
        end
    end

Default sub-class definition

    methods (Static, Access = protected)
        function defaultObject = getDefaultScalarElement
            defaultObject = ContactForceT_Spring;
        end
    end

Abstract methods: implemented in derived sub-classes

    methods (Abstract)
        %------------------------------------------------------------------
        this = setDefaultProps(this);

        %------------------------------------------------------------------
        this = setCteParams(this,interact);

        %------------------------------------------------------------------
        this = evalForce(this,interact);
    end

end

Published with MATLAB® R2019b