Time-dependent creep stress redistribution analysis of thick-walled FGM spheres subjected to an internal pressure and a uniform temperature field is investigated. The material creep and mechanical properties through the radial graded direction are assumed to obey the simple power-law variation throughout the thickness. Total strains are assumed to be the sum of elastic, thermal and creep strain...

cylinders utilising elastic materials of cylindrical anisotropy. The formulation is based on linear three dimensional elasticity using an analytic form for the displacement field. A similar formulation has been used in the study of waves in plates and more recently, by the authors, in homogeneous cylinders. We have now developed the necessary formulas to apply it to cylinders in which the inhom...

Thick-walled cylindrical parts with external grooves are widely used in the automobile and aviation fields. Traditional processes for fabricating such components can’t meet requirements of properties efficiency. The dieless radial spinning process was proposed to produce thick-walled grooves. forming characteristics effects various parameters on were studied by using orthogonal tests finite ele...

Solitary fibrous tumor (SFT) is a ubiquitous rare mesenchymal neoplasm. Pleura is the favored site of origin and is rare in the oral cavity. SFT occurs across a wide histopathologic spectrum. Fibrous form characterized by hyalinized, thick-walled vessels with opened lumina and strong CD34 reactivity constitute one end and on the other end, a cellular form representing the conventional hemangiop...

The present paper deals with the ultrastructure of zoospores produced by the plasmodiophorid Maullinia ectocarpii, living in the marine algal host Ectocarpus siliculosus. The zoospores described here are very similar to secondary zoospores of Polymyxa graminis and Phagomyxa sp. (the latter an algal endoparasite, also). Our results indicate that M. ectocarpii produces two types of plasmodia, and...

Thick-walled X80 pipelines for oil and gas transportation are difficult to relocate due their large size. In the process of narrow-gap overhead welding, welding defects, such as bulges lack sidewall fusion, can appear easily. To avoid these defects improve quality thick-walled pipelines, GMAW method is adopted in this paper. The formation characteristics weld influence arc oscillation parameter...