To study the deformation and fracture mechanism of 6061 aluminum alloy extruded pipe after secondary heat treatment under different stress triaxiality, a Johnson–Cook failure model was developed. Through FEM method SEM, types tensile specimens analyzed. The research results show that could better simulate types, parameters were finally obtained D1 = 0.29, D2 1.356, D3 ?2.567. With increase stra...

Abstract A large share of the primary energy is consumed to provide space heating. Geothermal offers a regenerative alternative. For reasons efficiency and environmental protection, it important ensure system integrity borehole heat exchanger (BHE). Previous investigations have focused on individual components BHE or grout pipe systems’ integrity. This study analysis hydraulic complete subsoil–...

The functioning of the first type, the flue or labial pipe, was already investigated within previous extensive research projects. The second pipe type, the reed pipe, is less often installed in pipe organs, and only little research was done in this field so far. This is why this pipe type is now the focus of research of the working group ‚Musical Acoustics ‘ at the Fraunhofer Institute for Buil...

*Prepared in the Program Division, B u reau of Employment Security. D U R I N G 1946, employers subject to State unemployment insurance laws were taxed at an estimated average rate of 1.4 percent of taxable pay rolls (table l ) 1 —the lowest average rate since the first year of the program (1936) when the Federal tax rate was only 1 percent. The 1.4percent revenue rate is expected to yield $828...

The restriction of Pipe, a potential glycosaminoglycan-modifying enzyme, to ventral follicle cells of the egg chamber is essential for dorsoventral axis formation in the Drosophila embryo. pipe repression depends on the TGFalpha-like ligand Gurken, which activates the Drosophila EGF receptor in dorsal follicle cells. An analysis of Raf mutant clones shows that EGF signalling is required cell-au...

Several literatures presented automated systems for detecting or classifying sewer pipe defects based on morphological features of pipe defects. In those automated systems, however, the morphologies of the darker center or some uncertain objects on CCTV images are also segmented and become noises while morphology-based pipe defect segmentation is implemented. In this paper, the morphology-based...

CRA-lined pipelines, i.e. pipes with an inner pipe of a corrosion resistant alloy inside of a ferritic steel pipe carrying the hoop stress, pose a challenge to inspect with conventional in-line inspection technologies. Existing UT technology is not able to inspect through the interface of a CRA and a ferritic steel component. Additionally, current MFL technology is not able to sufficiently magn...

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The purpose of this research is to develop an electromagnetic pump system for electrification casting applications, and paper reports the evaluation results drive characteristics considering fluid elements or time harmonics that are inverter driven. First, elements, alternative experiment proposed using oil mixed with aluminum powder, lift speeds driven at variable frequencies by a pure sinusoi...