= Tomasz Wierzbicki
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\b[Tomasz Wierzbicki] is an applied-mechanics researcher and MIT emeritus professor whose work concerns <plastic deformation>, structural failure and <crashworthiness>. His MIT curriculum vitae lists research comparing experimental sheet fracture and tearing with numerical predictions; the laboratory account identifies dynamic plasticity and structural failure as central research themes.<Tomasz Wierzbicki at MIT>[Official faculty profile; author CV, selected2010–2012 publications; historical laboratory research account]{ref}
\Image[https://meche.mit.edu/sites/default/files/styles/medium/public/pictures/picture-77-1428096318.jpg?itok=LdqiInzF]
{title=Tomasz Wierzbicki, from his labeled MIT faculty portrait}
{height=200}
{source=https://meche.mit.edu/people/faculty/[email protected]}
His structural-mechanics teaching makes the relation between measurement and model explicit. A uniaxial tensile test measures axial force, extension and lateral contraction. Those observations determine <Young's modulus> and <Poisson's ratio> under the stated loading conditions, rather than treating material parameters as properties of a specimen's shape.<Development of Constitutive Equations for Continuum, Beams and Plates by Tomasz Wierzbicki>[§4.1, Figure4.1 and uniaxial stress/strain relations]{ref}
An original work calculation illustrates a related structural-design distinction. A constant resisting <force> of $3\,\mathrm{kN}$ over a compression stroke of $0.1\,\mathrm m$ takes input <work> $300\,\mathrm J$. A triangular force–displacement curve with the same peak and stroke has area $150\,\mathrm J$. Equal peak loads therefore need not imply equal energy input. The area under the measured curve, together with unloading behaviour, helps distinguish total work from recoverable <elastic energy>.
These are illustrative curves, not measurements from a Wierzbicki experiment. His work on structural failure and constitutive models addresses the broader task of connecting geometry, material response and observed load histories.
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