bracket base thickness

Heavy-duty commercial vehicles play a significant role in commodity logistics. For each of these vehicles, the suspension is the most essential system to support the load and road shock. Bogie type suspension system is employed to safeguard the vehicle from road shock. The bogie bracket is a juncture between the chassis and the axle in the suspension system. The bogie bracket has been identified as a critical part of the suspension system. In the present study, bogie bracket base design and modelling was performed using computer-aided engineering (CAE). The strength of the bogie was tested to identify weaker sections. Design modifications were performed to improve the strength on identified critical sections through reinforcement techniques. A road load data acquisition (RLDA) test was conducted under different road conditions to validate CAE results. Five different rough-road road surfaces were chosen for RLDA testing. Using strain gauges, strain data were acquired during the test. Corresponding stress values were obtained and maximum stress was found in all driving conditions. For the base design bogie bracket, under RLDA test, crack initiation and crack propagation were identified under vertical loads. A reinforced bogie bracket was designed and found to have a higher strength and longer expected life than that of the base design.

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Bracket base remnants after orthodontic debonding

The Angle Orthodontist ◽

10.2319/121112-930.1 ◽

2013 ◽

Vol 83 (5) ◽

pp. 885-891 ◽

Cited By ~ 7

Author(s):

Matteo Zanarini ◽

Antonio Gracco ◽

Monica Lattuca ◽

Silvia Marchionni ◽

Maria Rosaria Gatto ◽

...

Keyword(s):

Energy Dispersive ◽

Scanning Electron Micrographs ◽

X Ray ◽

Significant Difference ◽

Group A ◽

Fixed Appliances ◽

Group B ◽

Imagej Software ◽

Bracket Base ◽

Scanning Electron

ABSTRACT Objective: To evaluate whether the debonding procedure leads to restitutio ad integrum of the enamel surface by investigating the presence of enamel within the bracket base remnants after debonding. Materials and Methods: Sixty patients who completed orthodontic treatment with fixed appliances were included. A total of 1068 brackets were microphotographed; the brackets presenting some remnants on the base (n = 818) were selected and analyzed with ImageJ software to measure the remnant area. From this population a statistically significant sample (n = 100) was observed under a scanning electron microscope to check for the presence of enamel within the remnants. Energy dispersive x-ray spectrometry was also performed to obtain quantitative data. Results: Statistically significant differences in the remnant percentage between arches were observed for incisor and canine brackets (P < .0001 and P = .022, respectively). From a morphologic analysis of the scanning electron micrographs the bracket bases were categorized in 3 groups: group A, bases presenting a thin enamel coat (83%); group B, bases showing sizable enamel fragments (7%); group C, bases with no morphologic evidence of enamel presence (10%). Calcium presence was noted on all evaluated brackets under energy dispersive x-ray spectrometry. No significant difference was observed in the Ca/Si ratio between group A (16.21%) and group B (18.77%), whereas the Ca/Si ratio in group C (5.40%) was significantly lower than that of the other groups (P < .323 and P = .0001, respectively). Conclusion: The objective of an atraumatic debonding is not achieved yet; in some cases the damage could be clinically relevant.

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Impact of scaling base thickness on the performance of heterojunction phototransistors

Nanotechnology ◽

10.1088/1361-6528/aa5849 ◽

2017 ◽

Vol 28 (10) ◽

pp. 10LT01 ◽

Cited By ~ 11

Author(s):

Arash Dehzangi ◽

Abbas Haddadi ◽

Sourav Adhikary ◽

Manijeh Razeghi

Keyword(s):

Base Thickness

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Effect of Yd:YAG laser irradiation on the shear bond strength of orthodontic metal brackets

Dental Press Journal of Orthodontics ◽

10.1590/2177-6709.25.1.028-035.oar ◽

2020 ◽

Vol 25 (1) ◽

pp. 28-35

Author(s):

Fernando César Moreira ◽

Helder Baldi Jacob ◽

Luis Geraldo Vaz ◽

Antonio Carlos Guastaldi

Keyword(s):

Bond Strength ◽

Laser Irradiation ◽

Shear Bond Strength ◽

Surface Characterization ◽

Test Machine ◽

Base Surface ◽

Bonding Failure ◽

Significant Difference ◽

Chi Square Analysis ◽

Bracket Base

ABSTRACT Objective: The purpose of this study was to evaluate the effect of the Yd:YAG laser irradiation on orthodontic bracket base surface. Shear bond strength (SBS) values and sites of the bonding failure interfaces were quantified. Methods: Brackets were divided into two groups: OP (One Piece - integral sandblast base) and OPL (One Piece - laser irradiation). The brackets were randomly bonded on an intact enamel surface of 40 bovine incisors. The SBS tests were carry out using a universal test machine. A stereomicroscopy was used to evaluate the adhesive remnant index (ARI), and surface characterization was performed by scanning electron microscopy (SEM). Student’s t-test was used to compare the SBS between the two groups (p< 0.05). Frequencies and chi-square analysis were applied to evaluate the ARI scores. Results: OPL group showed higher value (p< 0.001) of SBS than OP group (43.95 MPa and 34.81 MPa, respectively). ARI showed significant difference (p< 0.001) between OPL group (ARI 0 = 100%) and OP group (ARI 0 = 15%). SEM showed a higher affinity between the adhesive and the irradiated laser base surface. Conclusions: Yd:YAG laser irradiation on bracket base increased SBS values, showing that bonding failure occurs at the enamel/adhesive interface. Laser-etched bracket base may be used instead of conventional bases in cases where higher adhesion is required, reducing bracket-bonding failure.

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pier base thickness

Dictionary Geotechnical Engineering/Wörterbuch GeoTechnik ◽

10.1007/978-3-642-41714-6_161450 ◽

2014 ◽

pp. 993-993

Keyword(s):

Base Thickness

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Effect of base thickness reduction on high speed characteristics and base resistance of InGaAs/InP heterojunction bipolar transistor

International Conference onIndium Phosphide and Related Materials, 2003. ◽

10.1109/iciprm.2003.1205331 ◽

2003 ◽

Cited By ~ 1

Author(s):

M. Kahn ◽

S. Blayac ◽

M. Riet ◽

P. Berdaguer ◽

V. Dhalluin ◽

...

Keyword(s):

High Speed ◽

Bipolar Transistor ◽

Heterojunction Bipolar Transistor ◽

Thickness Reduction ◽

Base Thickness ◽

Base Resistance

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Association between Lateral Skull Base Thickness and Surgical Outcomes in Spontaneous CSF Otorrhea

Otolaryngology ◽

10.1177/0194599816628528 ◽

2016 ◽

Vol 154 (4) ◽

pp. 707-714 ◽

Cited By ~ 14

Author(s):

Shawn M. Stevens ◽

Habib G. Rizk ◽

Wesley R. McIlwain ◽

Paul R. Lambert ◽

Ted A. Meyer

Keyword(s):

Skull Base ◽

Surgical Outcomes ◽

Base Thickness ◽

Lateral Skull Base

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The Optimum Dimensions of Circular Fins with Variable Thermal Parameters

Journal of Heat Transfer ◽

10.1115/1.3244316 ◽

1980 ◽

Vol 102 (3) ◽

pp. 420-425 ◽

Cited By ~ 66

Author(s):

P. Razelos ◽

K. Imre

Keyword(s):

Heat Transfer ◽

Thermal Conductivity ◽

Variable Thermal Conductivity ◽

Linear Variation ◽

Transfer Coefficients ◽

Base Thickness ◽

Optimum Length ◽

Heat Transfer Coefficients ◽

Trapezoidal Profile ◽

The Heat Transfer Coefficient

Optimum dimensions of circular fins of trapezoidal profile with variable thermal conductivity and heat transfer coefficients are obtained. Linear variation of the thermal conductivity is considered of the form k = k0(1 + εT/T0), and the heat transfer coefficient is assumed to vary according to a power law with distance from the bore, expressed as h = K[(r − r0)/(r0 − re)]m. The results for m = 0, 0.8, 2.0, and −0.4 ≤ ε ≤ 0.4, have been expressed by suitable nondimensional parameters which are presented graphically. It is shown that considering the thermal conductivity as constant, the optimum base thickness and volume of the fin are inversely proportional to the thermal conductivity of the material of the fin, while the optimum length and effectiveness are independent of the properties of the material used.

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