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22 lines
842 B
22 lines
842 B
%--------------------------
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% @Author: Jingqiao Hu
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% @Date: 2021-06-03 13:51:44
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% @LastEditTime: 2021-06-03 14:13:29
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%--------------------------
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function green_strain(F, globalx, globaly)
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m = size(F{1}, 2);
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I = repmat([1, 0, 0, 1]', 1, m);
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E = zeros(4, 4, m);
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for gp = 1:4
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Fg = F{gp}; % 4,m
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FT = Fg([1,3,2,4], :);
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E(gp, :, :) = (matrix_3d_multiply(FT, Fg) - I) * 0.5;
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end
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Em = squeeze(mean(E, 1));
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s1 = reshape(Em(1, :), globaly, globalx);
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s2 = reshape(Em(2, :), globaly, globalx);
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s3 = reshape(Em(4, :), globaly, globalx);
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figure; imagesc(s1); colormap(jet); axis equal; axis off; caxis([-0.1, 0.1]);
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figure; imagesc(s2); colormap(jet); axis equal; axis off; caxis([-0.15, 0.03]);
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figure; imagesc(s3); colormap(jet); axis equal; axis off; caxis([-0.1, 0.1]);
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end
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