Effects of ractopamine hydrochloride (RH) and zilpaterol hydrochloride (ZH) on saleable yield of carcass sides from calf-fed Holstein steers were evaluated using steers implanted with a progesterone (100 mg) plus estradiol benzoate (10 mg) implant followed by a terminal trenbolone acetate (200 mg) plus estradiol (40 mg) implant. Steers were blocked by weight into pens (n = 32) randomly assigned...

The paper discusses the experimental and finite element investigation into the failure mechanisms of uniply graphite-epoxy composite plates with circular holes loaded in uniaxial compression. The effect of hole size on the failure mode is established. Test specimens composed of a single layer of uniply graphite-epoxy sandwiched between two layers of transparent polyetherimide plastic were desig...

Abstract Thermal buckling study on the symmetric laminated composite trapezoidal plate with a circular cutout subjected to uniform increase in temperature for various boundary conditions is explored this paper. In mathematical model, first-order shear deformation principle employed accordance variational energy system. For acquiring thermal temperature, nine-node heterosis relation has been use...

Trapezoidal laminated plates with cutouts are commonly found in many engineering field, especially aerospace structures. In cases these subjected to various harsh environmental conditions during its service life. Thermally induced load is the one which seriously affect buckling characteristics of structural components. The study presents effect rise temperature on thermal trapezoidal composite ...

This paper proposes an explicit method for topology optimization of stiffened plate structures. The present work is devoted to simultaneously optimizing stiffeners’ shape, size and layout by seeking the optimal geometry parameters a series moving morphable components (MMC). stiffeners with straight skeletons curved are considered enhance modeling capability current approach. All represented und...