Design Development And Testing Of Drop-weight Impact Test Machine

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The aim of this project is to design a drop weight impact test machine and conductrntest with the prototype. The testing of materials under dynamic conditions needsrnan e cient and reliable equipment to experimentally examine and quantify the dynamicrnbehavior of materials under low velocity impact loads.rnDrop weight impact test machine designed and modeled is vertical, double column,rnsimple, compact, inexpensive and easily transported to desired location. The developmentrnprocess includes conceptual design phase, detailed design phase prototypingrnand testing the intended testing machine. Both drop weight and height can be variedrnindependently. The measurement system includes piezoelectric accelerometerrnconnected to the drop weight and Model 485B39 digital ICP signal conditioner.rnASTM D7136/7136M standard testing method followed. The machine has a strikerrnof xed shape and known mass which has interchangeable 16 mm diameter hemisphericalrntup, two friction less guide rod assembly to freely fall the impact assembly,rn1:2 m wide-rnanged drop tower which used as a main support structure, a supportrnbracket which attach the guide rod assembly to the drop tower and specimen xturernwhere standard rnat rectangular test specimen (150 mm 100 mm) sits on. Itrnhas maximum drop height of 0.62 m, standard mass of 5.5 Kg with increment ofrn0.45 and 0.5 Kg, and maximum impact energy and velocity of 33.5 J and 3.49 m/srnrespectively.rniii

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Design Development And Testing Of Drop-weight Impact Test Machine

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