In this paper, numerical simulation of FRP composite cylinder tubes progressive crushing processes is conducted using LS-Dyna. Details on the numerical modeling strategy are given and discussed. It is found that triggers introduced in the numerical simulation can effectively model the bevel trigger at the end of the tubular specimens. It is also found that two-layer finite element model based o...

This study investigated 24 tablet crushing devices for drug loss using different methods to recover the crushed tablet. 24 devices were compared: 3 with disposable cups, 6 with disposable bags, 12 without separate vessels and 3 types of mortar and pestle. One paracetamol tablet was crushed and recovered by tapping the powder out. Where appropriate, depending on crusher size and manufacturer ins...

This study set out to assess the respirable mass, surface area, and number concentrations of the alpha-quartz content particles (C(r-m), C(r-s) and C(r-n)) to which workers were exposed in six different exposure groups, the raw material handling (n=10), crushing (n=12), mixing (n=12), forming (n=10), furnace (n=10), and packaging (n=10), in a refractory material manufacturing plant. For C(r-m),...

Metallic tubes, under axial loading, are frequently preferred in many different industries due to their high energy absorption efficiency. The studies increase the capacity (EAC) of these structures still up date. In this study, deformation behavior and EAC regionally pre-deformed identical aluminum steel tubes loading were investigated experimentally. Regional strength was obtained by radial w...

Both chemical corrosion and axial compression impose critical influences on the internal microstructure of rock. Meanwhile, can change a rock’s mineral composition, which in turn affects physical mechanical properties To investigate dynamic strength characteristics white sandstone under coupling effect load corrosion, static combined loading test device was adopted for performing cyclic impact ...

Mammalian molluscivores feed mainly by shell-crushing or suction-feeding. The extinct marine arctoid, Kolponomos, has been interpreted as an otter-like shell-crusher based on similar dentitions. However, neither the masticatory biomechanics of the shell-crushing adaptation nor the way Kolponomos may have captured hard-shelled prey have been tested. Based on mandibular symphyseal morphology shar...