Design Optimisation of Lower-Bound Buckling Capacities for FRP-Laminated Cylindrical Shells

<table>Effect of radius to thickness ratio on the classical and reduced stiffness critical loads for the case of <svg height="14.8375" id="M180" style="vertical-align:-3.22281pt" version="1.1" viewbox="0 0 78.262497 14.8375" width="78.262497" xmlns="http://www.w3.org/2000/svg">
<g transform="matrix(1.25,0,0,-1.25,0,14.8375)">
<g transform="translate(72,-60.13)">
<text transform="matrix(1,0,0,-1,-71.95,63.39)">
<tspan style="font-size: 12.50px; " x="0" y="0">[</tspan>
<tspan style="font-size: 12.50px; " x="4.1634989" y="0">9</tspan>
<tspan style="font-size: 12.50px; " x="10.414999" y="0">0</tspan>
</text>
<text transform="matrix(1,0,0,-1,-55.28,68.39)">
<tspan style="font-size: 8.75px; " x="0" y="0">∘</tspan>
</text>
<text transform="matrix(1,0,0,-1,-51.72,63.39)">
<tspan style="font-size: 12.50px; " x="0" y="0">,</tspan>
<tspan style="font-size: 12.50px; " x="7.2892489" y="0">0</tspan>
</text>
<text transform="matrix(1,0,0,-1,-38.18,68.56)">
<tspan style="font-size: 8.75px; " x="0" y="0">∘</tspan>
</text>
<text transform="matrix(1,0,0,-1,-34.62,63.39)">
<tspan style="font-size: 12.50px; " x="0" y="0">,</tspan>
<tspan style="font-size: 12.50px; " x="7.2892489" y="0">0</tspan>
</text>
<text transform="matrix(1,0,0,-1,-21.07,68.56)">
<tspan style="font-size: 8.75px; " x="0" y="0">∘</tspan>
</text>
<text transform="matrix(1,0,0,-1,-17.51,63.39)">
<tspan style="font-size: 12.50px; " x="0" y="0">]</tspan>
</text>
<text transform="matrix(1,0,0,-1,-13.35,60.27)">
<tspan style="font-size: 8.75px; " x="0" y="0">s</tspan>
</text>
</g>
</g>
</svg> with <svg height="10.9125" id="M181" style="vertical-align:-0.17555pt" version="1.1" viewbox="0 0 65.737503 10.9125" width="65.737503" xmlns="http://www.w3.org/2000/svg">
<g transform="matrix(1.25,0,0,-1.25,0,10.9125)">
<g transform="translate(72,-63.27)">
<text transform="matrix(1,0,0,-1,-71.95,63.5)">
<tspan style="font-size: 12.50px; " x="0" y="0">𝐿</tspan>
<tspan style="font-size: 12.50px; " x="12.315455" y="0">=</tspan>
<tspan style="font-size: 12.50px; " x="24.355844" y="0">2</tspan>
<tspan style="font-size: 12.50px; " x="30.607344" y="0">.</tspan>
<tspan style="font-size: 12.50px; " x="33.733093" y="0">0</tspan>
<tspan style="font-size: 12.50px; " x="39.984592" y="0">4</tspan>
<tspan style="font-size: 12.50px; " x="46.236095" y="0">8</tspan>
</text>
</g>
</g>
</svg>.</table>

International Scholarly Research Notices

fig12

Figure 12

Figure 12: Design Optimisation of Lower-Bound Buckling Capacities for FRP-Laminated Cylindrical Shells 