Click on “Download PDF” for the PDF version or on the title for the HTML version. If you are not an ASABE member or if your employer has not arranged for access to the full-text, Click here for options. Crushing force, deformation modulus and crushing strength of timothy hay nodal stem segmentsPublished by the American Society of Agricultural and Biological Engineers, St. Joseph, Michigan www.asabe.org Citation: Paper number MBSK 06-215, ASABE/CSBE North Central Intersectional Meeting . (doi: 10.13031/2013.22373) @2006Authors: Anthony Opoku, Lope G Tabil, Sana Talebi Keywords: Crushing force, strength, modulus of deformation, timothy hay, compression, compaction, Hessian fly, puparia, stem node To disinfest timothy hay bales of Hessian fly puparia (Mayetiola destructor (Say)), mechanical compaction should be able to crush the hay stem node in order to destroy the puparia located near it. The Instron testing machine was used to determine the maximum crushing force, modulus of deformation and the crushing strength of nodal stem segments. The tests were done at crosshead speeds of 5, 15 and 25 mm/min. The hay samples used had moisture contents of 10.7%, 13.7% and 17.6%. The maximum crushing force, deformation modulus and the crushing strength of the timothy hay stem segments increased with increasing width of the hay node after compression. Increasing the crosshead speed increased the crushing force, deformation modulus and the crushing strength. The crushing force, deformation modulus and the crushing strength decreased with increasing moisture content. The average maximum crushing force ranged from 1.4570 to 2.3583 kN, with a SD range of 0.4112 to 0.7459 kN. The average deformation modulus of the timothy hay stem segments varied from 3075 to 4103 N/mm, with a SD range of 443 to 756 N/mm. The average maximum crushing strength of the stem segments ranged from 11.24 to 19.52 MPa, with a SD range of 1.82 to 3.55 MPa. (Download PDF) (Export to EndNotes)
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