Benesch, Friedlander, Coplan & Aronoff LLP
Grips for a linear fracture testing machine and method of designing same
Test fixture grips for testing quasibrittle materials, such as fiber-polymer composites are provided having increased mass and stiffness relative to standard test grips to provide for obtaining postpeak measurements. The design is based on static analysis (using the second law of thermodynamics), confirmed by dynamic analysis of the test setup as an open system. Dynamic analysis of the test setup as a closed system with PID controlled input further indicates that the controllability of postpeak softening under CMOD control is improved not only by increasing the grip stiffness but also by increasing the grip mass.
NORTHWESTERN UNIVERSITY
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inventional inventional inventional additional additional additional inventional additional
Weixin Zden{hacek over (e)}k P Gianluca Viet T. Marco
Li Ba{hacek over (z)}ant Cusatis Chau Salviato