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31 lines
849 B
31 lines
849 B
%--------------------------
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% @Author: Jingqiao Hu
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% @Date: 2020-10-29 15:04:18
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% @LastEditTime: 2021-03-13 16:52:53
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%--------------------------
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% F(x) of every point x is 2*2:
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% [duxdx, duxdy
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% duydx, duydy];
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% For one macro-ele & one gauss point:
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% F(x) is sum of 4 nodes
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% [ux1, 2, 3, 4 * [dN1dx, dN1dy
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% uy1, 2, 3, 4] dN2dx, dN2dy
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% dN3dx, dN3dy
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% dN4dx, dN4dy]
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function F = deform_grad_1scale(edofMat, U, gradN)
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eleNum = size(edofMat, 1);
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F = cell(4, 1);
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for gp = 1:4
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B = gradN{gp};
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Fm = zeros(4, eleNum);
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for ele = 1:eleNum
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edof = edofMat(ele, :);
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ue = reshape(U(edof), 2, []);
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Fe = eye(2) + ue * B'; % NOTE: + 1
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Fm(:, ele) = Fe(:);
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end
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F{gp, 1} = Fm;
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end
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end
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