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109 lines
3.8 KiB
109 lines
3.8 KiB
3 years ago
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%--------------------------
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% @Author: Jingqiao Hu
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% @Date: 2021-02-19 22:39:04
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% @LastEditTime: 2021-02-20 11:46:56
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% PARAMATERS: macro:[nely,nelx,nelz], micro:[microx^3], lx: macro-ele length
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% opt: type of microstructure
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%--------------------------
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function [localx, globalx] = generateStruct(microx, nelx, nely, nelz, opt)
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x = zeros(microx, microx, microx);
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globalx = zeros(nely*microx, nelx*microx, nelz*microx);
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localx = cell(nely, nelx, nelz);
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switch opt
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case 'interval'
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% x(microx/2 : end, :) = 1;
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% x(:, round(microx/2) : end, :) = 1;
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x(:) = 1;
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quartx = round(microx / 4);
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x(:, 1+quartx:microx-quartx, :) = 0;
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% x = 1-x;
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for i = 1:nelx
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for j = 1:nely
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for k = 1:nelz
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[offsetx, offsety, offsetz] = micro_offset(i, j, k, microx);
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globalx(offsety, offsetx, offsetz) = x;
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localx{j,i,k} = x;
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end
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end
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end
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case 'ellipse'
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mina = 0.1; maxa = 0.4;
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minb = 0.1; maxb = 0.4;
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minc = 0.1; maxc = 0.4;
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a = maxa;
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% theta = 0;
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for i = 1:nelx
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b = maxb;
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for j = 1:nely
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c = maxc;
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for k = 1:nelz
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x(:) = 0;
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for ii = 1:microx
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for jj = 1:microx
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for kk = 1:microx
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ey = jj-microx/2;
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ex = ii-microx/2;
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ez = kk-microx/2; % TODO: ADD rotation
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if (ex/microx/a)^2 + (ey/microx/b)^2 + (ez/microx/c)^2 < 1
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x(jj,ii,kk) = 1;
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end
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end
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end
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end
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[offsetx, offsety, offsetz] = micro_offset(i, j, k, microx);
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globalx(offsety, offsetx, offsetz) = x;
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localx{j,i,k} = x;
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c = c - (maxc-minc)/nelz;
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end
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b = b - (maxb-minb)/nely;
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end
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a = a - (maxa-mina)/nelx;
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% theta = theta + (pi/2)/nelx;
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end
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globalx = 1-globalx;
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case 'bar'
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mina = 0.1; maxa = 0.4;
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w = mina;
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for i = 1:nelx
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for j = 1:nely
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for k = 1:nelz
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x(:) = 0;
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% FIXME: Z-axis don't need to be changed
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x(1:round(w*microx), :, :) = 1;
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x(round(microx-w*microx+1):microx, :, :) = 1;
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x(:, 1:round(w*microx), :) = 1;
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x(:, round(microx-w*microx+1):microx, :) = 1;
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x(:, :, 1:round(w*microx)) = 1;
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x(:, :, round(microx-w*microx+1):microx) = 1;
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[offsetx, offsety, offsetz] = micro_offset(i, j, k, microx);
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globalx(offsety, offsetx, offsetz) = x;
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localx{j,i,k} = x;
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w = w + (maxa-mina)/nelx/nely/nelz;
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end
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end
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end
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end
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% for i = 1:nelz*microx
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% figure; imagesc(1-globalx(:,:,i)); axis equal;
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% end
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end
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% compute the index of each micro-ele in full-scale
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function [offsetx, offsety, offsetz] = micro_offset(i, j, k, microx)
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offsetx = (i-1)*microx+1 : i*microx;
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offsety = (j-1)*microx+1 : j*microx;
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offsetz = (k-1)*microx+1 : k*microx;
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end
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