ultraviolet waves, because of their short wavelength, have a high energy and considerable damaging effects on surfaces. protection against ultraviolet radiations is one of the finishing treatments done on surfaces exposed to sunlight. the importance of this issue in relation to human health, due to complications such as skin burns and cancer, is doubled. up to now, different materials such as z...

This paper describes finite element simulations of the structural deformation and material fracture behaviour high-strength steel RHS K gap truss joints. The fundamental scope was to examine whether joint strength predictions based on lower more ductile with a yield stress 355 MPa or less would hold good for higher 450 ductility. FEA reliability analysis indicates that failure modes associated ...

A method of tube joining by plastic deformation has efficient, reliable and environmentally friendly features, so that it is widely applied into the fabrication aviation pipeline. Internal rolling potential to join high strength titanium alloy tubes withstanding pressure medium with better sealing performance. Taking TA18 as case material, this presentation combines numerical modelling experime...

This study investigated the tensile and bonding properties between cement-based grouting materials (CBGM) high-strength bolts. The associated failure mechanism, load-slip curve, ultimate pull-out load bond stress were also studied. effects of anchorage length square steel tube restraint on explored basis 24 specimens used in central testing, a stress–slip constitutive relationship model bolts C...

Welding procedures for repairing corroded tubular structures are commonly used; however, composite material repairs becoming popular since they do not use heat sources that might cause accidents. This paper provides a detailed description of the CFRP patch repair application in steel members with circular perforation originated from prolonged corrosion process. The results experimental tests on...

Observations of Ti I lines at 2.2 µm show that the Evershed flow takes place in cool, almost horizontal channels with a low magnetic field strength (≈ 500–900 G) that does not appear to change significantly across the penumbra. This property might allow an outward directed siphon flow to exist along such cool flux tubes.

Little is known about the effect of specimen preparation and testing protocols on the micro-shear bond strength (μSBS) results. To evaluate whether variations in polyethylene rod use affect (μSBS)). Human dentin disks were randomly distributed into six groups (n = 5): polyethylene tube (3 levels) and adhesive system (2 levels). In Group 1, polyethylene tubes filled with polymerized composite) w...