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Reinforced solid
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<p>In <a href="/facts/Solid_mechanics/e1Yq50IS">solid mechanics</a>, a reinforced solid is a <a href="/facts/Brittle/cn27H2vg">brittle</a> material that is reinforced by <a href="/facts/Ductile/SBJsahEk">ductile</a> bars or fibres. A common application is <a href="/facts/Reinforced_concrete/aUTUKAQF">reinforced concrete</a>. When the concrete cracks the tensile force in a crack is not carried any more by the concrete but by the steel reinforcing bars only. The reinforced concrete will continue to carry the load provided that sufficient reinforcement is present. A typical design problem is to find the smallest amount of reinforcement that can carry the <a href="/facts/Stress_(mechanics)/ErAXDbbd">stresses</a> on a small cube (Fig. 1). This can be formulated as an <a href="/facts/Mathematical_optimization/oRn8Iv5I">optimization</a> problem. </p>