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Reference.org
Southwell plot
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<p>The Southwell plot is a <a href="/facts/Graphical_method/LFHnfBg0">graphical method</a> of determining experimentally a structure's <a href="/facts/Structural_load/MAxjDyhc">critical load</a>, without needing to subject the structure to near-critical loads. The technique can be used for <a href="/facts/Nondestructive_testing/Czz0Vt0B">nondestructive testing</a> of any <a href="/facts/Structural_element/BdYjdKrq">structural elements</a> that may fail by <a href="/facts/Buckling/doPxSySY">buckling</a>. </p>