%0 Journal Article
%T An¨¢lisis de la fractura de una biela de compresor de refrigeraci¨®n
%A Porras
%A Ernesto Germ¨¢n
%A Rodr¨ªguez Pulecio
%A Sara
%A Coronado
%A John Jairo
%J Ingenier¨ªa e Investigaci¨®n
%D 2010
%I Universidad Nacional de Colombia
%X this paper analysed the fracture of a connecting rod from a food product refrigeration compressor. according to the connecting rod-crank mechanism¡äs operating characteristics, the element being studied was subjected to variable load cycles. connecting rod loads are compressive in normal operating conditions; however, an increased friction coefficient induces flexion load. based on the connecting rod¡äs microstructures, fracture surface characterisation and stress state estimation, it was concluded that the failure originated in a breakdown of connecting rod-crankshaft lubrication causing scuffing, severe wear and a high friction coefficient. likewise, the results showed that when the friction coefficient increased to 0.4, then stress reached levels above those acceptable for the connecting rod material (molten aluminium-silicon alloy) being considered. manufacture defects, pores and cracks increased stress concentration, thereby contributing to the mechanical element¡äs failure.
%K connecting rod
%K compressor
%K lubrication
%K wear
%K friction coefficient.
%U http://www.scielo.org.co/scielo.php?script=sci_abstract&pid=S0120-56092010000100022&lng=en&nrm=iso&tlng=en