On the Non-Linear Coil Springs

on the effect of linear & non-linear texts on students comprehension and recalling

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Surging in Coil Springs

Effects of Topical Fluoride Prophylactic Agents on the Mechanical Properties of Orthodontic Nickel-titanium Closed Coil Springs and Stainless Steel Closed Coil Springs

The purpose of this study was to investigate the effects of topical fluoride prophylactic agents on the mechanical unloading properties of nickel-titanium (NiTi) and stainless steel (SS) closed coil springs. Spring were stored at 37 ̊C under static load in phosphate buffered saline (PBS) and treated with either neutral sodium fluoride (NaF) or acidulated phosphate fluoride (APF) five days per we...

the effects of aging process and preactivation on mechanical properties of nickel-titanium closed coil springs

background: the most favorable feature of nickel-titanium (ni-ti) alloys in orthodontics is producing constant forces in a wide deformation range. ni-ti closed coils produce compressive strength and can be used for several purposes such as space closure. the aim of this study was to evaluate the effects of the aging process (temperature changes and prolonged strain) on ni-ti closed coils and to...

Helical Coil Suspension Springs in Finite Element Models of Compressors

This paper discusses two approaches to modeling helical suspension springs for use in a dynamic finite element compressor model. The first approach represents the spring's stiffness characteristics with a simple spring element matrix. The appropriate spring constants are calculated using a separate finite element model of the spring. The spring modeling procedure is described and supplemented w...