STRENGTH CHARACTERISTICS of PRESSURIZED CANS

Abstract

To study the strength advantages of pressurized cans used for food packaging, two indicators of can strength, maximum axial load and maximum external pressure, were investigated experimentally. Unbeaded 303 × 406 steel cans having several thicknesses and tempers with various internal pressures were tested. Also tested were beaded steel cans and aluminum cans with 206 × 406 dimensions. Failure of the cans was by both buckling and yielding. the results indicated that steel can thicknesses could be significantly reduced, and beading eliminated, by using internal pressure to supplement can strength.

STRENGTH CHARACTERISTICS of PRESSURIZED CANS

“…Two strength criteria important in common can failures were used in this study (Brewbaker 1986). Loud resisrance is the maximum axial load, in pounds, that a can will withstand before deforming significantly from its original configuration.…”

“…A new technique which pressurizes the cans of noncarbonated products is now in commercial use on a limited scale (Frye 1984;Anon. 1982).…”

EXPERIMENTAL VERIFICATION and USE of PRESSURIZED CAN MODELS

“…More involved models of the stresses within compressed cans were also studied (Brewbaker 1986). The sidewall and ends were considered separately under the primary loads of compression and pressure, and then the edge loads and moments due to their interaction at the junction are calculated, based on the fact that, under these loading conditions, the edge must remain intact.…”

“…A recent experimental investigation of the strength characteristics of pressurized food cans was conducted to investigate potential material and thickness changes that might be possible if pressurization became a more popular processing option in the future (Brewbaker 1986).…”

“…In the interest of brevity and because we used the referenced theoretical and empirical models without alteration this paper does not repeat any of the details, which can be obtained from the original references or the complete documentation (Brewbaker 1986) of this project.…”