In this paper, a quasi-optical resonator with new coupling method and parasitic-mode-suppressing in 110–170 GHz is proposed. The of terahertz (THz) paper realized by PCB substrate processing pressurized flange. At the same time, parasitic mode effectively suppressed slitting plane mirror to reduce influence on main during test. And fused quartz sample was tested verify feasibility system for co...

A magnetlc method for the measurement of residual longitudinol stress i n the outer portions of cylindrical bars is developed and applaed to nickel and steel. I t involves measurement of the reversible effective permeobili ty over a range of frequency of the applted alternating field. Special composite specimens, in which ony desired level of residual stress con be produced, serve as idealized ...

In the slitting method, a small width slit is created incrementally through the thickness of the stressed specimen and the released strains in each increment are recorded by a strain gauge. Compliance coefficients relate the measured strains to the residual stresses. This paper investigates the important parameters influencing the calculation of compliance coefficients for isotropic plates and ...

Established methods for calculating residual stresses from the strains measured when using the slitting method give results for the stresses that exist within the depth range of the slit. Practical considerations typically limit this range to about 90-95% of the specimen thickness. Force and moment equilibrium can provide additional information that may be used to estimate the residual stresses...

This paper examines the application of the incremental slitting technique for residual stress measurement to plastically deformed four-point bent beams and autogenously edge welded steel beams. Initially a study into a number of factors affecting the series expansion approach was conducted. Due to the over-determined nature of the series expansion approach appropriate selection of polynomial se...

This research investigates the effect of post-cure time on residual stresses in laminated composites. Laminated composites were made of T300 carbon fibers and epoxy resin. The post-cure process was carried out at the constant temperature of 120 °C for 6 and 12 hours for two specimens. The slitting method was employed to determine through-thickness residual stress distribution of the composite l...

AIM: To investigate the effect of bicanalicular silicone tube intubation (BSTI) in treatment functional epiphora after endoscopic dacryocystorhinostomy (En-DCR). METHODS: Clinical data 84 patients (95 eyes) with En-DCR were retrospectively analyzed. Functional was confirmed as persistent or recurrent by fluorescein dye disappearance test (FDDT), lacrimal irrigation test, well examination. Secon...