Exemplos de uso de Pull-out test em Inglês e suas traduções para o Português
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The most widely used, due to its simplicity and effectiveness,is the so called pull-out test POT.
Pull-out tests were also performed on specific nails that were installed for this purpose.
Proposed a modification of the pull-out test, which was named the APULOT test. .
All these parameters were used in the computer modeling of the bar pull-out tests.
Pull-out tests of 4,2 mm diameter rebars partly immersed into concrete cylinders were made.
Presented a simplified alternative to the pull-out test, called the APULOT test, to be used in situ.
The pull-out tests were realized with displacement control in a universal test machine with load capacity of 300 kN.
Figure 10 shows the finite elements mesh that was used in the modeling of the pull-out test for the bar of 10 mm diameter.
The computer modeling of the pull-out tests was executed with the DIANA 9.3 software, based on the finite element method 39.
Traditionally, the bonding stress is determined by means of the standard pull-out test, due to the easy executing process of this test. .
Specimens were prepared to pull-out test to verify the bond strength using a universal testing machine with 1.5 mm/min speed.
In the APULOT tests simulations, the asymmetrical analysis with the same type of finite element andthe same constituent models for the materials of pull-out test were also used.
In pull-out test occurs a longitudinal compression component, and to minimize this effect, a non- bonded zone after the backing plate is considered.
They propose an adaptation of the traditional method pull-out test(pot), normalized by the ceb/ fip rc6: 1983, because it is a test of low complexity and low cost.
Figure 12 reveals there was an increase in the stress value and also in the amount of cracks as the bar diameter increases from 8,0mm to 12,5 mm, similar to the pull-out test.
Table 3 shows the results of pull-out tests of the bars with 10 mm diameter and bonding length equal to 10 cm, i.e. ten times the bar diameter 10?
The objective of this study was to evaluate the influence of the mdpb-containing on the long term bond strength of dental posts to the dentin, through the pull-out test.
One is the modified proposed of pull-out test, which was elaborated by Lorrain and Barbosa[1] called APULOT test Appropriete pull-out-test.
Table 3 shows the results of the mechanical properties of the concrete,as well as the results of the pull-out tests, carried out on test specimens with bars of 10 mm diameter.
In this case, the results were obtained by pull-out tests conform to literature[3], on bars of 8 mm and 20 mm of diameter embedded in concrete with compressive strength of up to 93 MPa.
This study investigated the influence of internal filling on the pull-out capacity of open-ended steel pipe-piles through two sets of pull-out tests on reduced scale models, at 20g, performed in a geotechnical centrifuge.
These tests can be basically subdivided in bar pull-out tests[3-10], beam bending tests[6, 11-13], and direct traction tests on rods or concentric pull-out test 14.
Figure 10 shows the stress distribution in the model with values presented in MPa in the description, together with the cracking andthe deformed structure in the load step when it is reached the bond last stress value for the pull-out tests with concrete compressive strength equal to 49,3 MPa and 8,0 mm, 10,0 mm and 12,5 mm bars diameter.
The pull-out tests results for the concrete compressive strength at 28 days of 49,3 MPa Figure 9 shown in the force-sliding diagrams compares the range of experimental results with the numerical results for 8, 0 mm, 10.0 mm and 12.5 mm bars.
Furthermore, other researchers confirm that the bonding stress obtained from the pull-out test without yielding of the reinforcement gives bonding strength values well above the normative values 8.
The pull-out test method was performed according to the recommendations of the standard CEB/ FIP RC6: 1983[8], which stipulates that the concrete cube dimensions are equal to ten times the diameter of the bar 10Ø, and the minimum size is 20 cm and the anchor is fixed at five times the diameter of the bar 5Ø.
This may be occurring because the concrete coverage around the bar is higher in the pull-out test than in the APULOT tests, thus contributing to a better distribution of the stresses generated during the test. .
In all pull-out tests the bond rupture occurred by sliding. In the APULOT tests, however, the bond rupture for the test with 8,0 mm bar occurred by sliding, whereas the bond failure mode occurred by splitting for the concrete mechanical strength used in the tests with 10,0 mm and 12,5 mm bars.
The aim of this study was to evaluate the effect of insertion technique for resin cement and ultrasonic vibration(us), on the voids and bond strength(bs)of resin cement to dentin, by computed microtomography(microct) and pull-out test, and to verify the correlation between the response variables.
One of the most popular and traditional bond tests is the direct pull-out test, called the pull-out test, normalized by RILEM/ CEB/ FIP RC6[3] and ASTM[4]. It is a test of reinforced concrete composite materials to seeks to assess the strength of the bond between the concrete and the reinforcement.