Suture Retention Strength Tests

Suture Retention Strength Tests

A systematic study of the factors affecting the suture retention test was conducted. The sample width w and the distance a of the seam temperature a from the free edge of the sample emerge as the most effective geometric parameters. A conservative approach to measuring suture retention resistance is determined, which is based on the use of a camera to track the initial error and detect the earliest crack propagation. The corresponding critical force, referred to as the initial tensile strength, is highly resistant to variations in the test parameter and becomes negligible when the dependence on the sample geometry is 2 mm and 10 mm. Comparison of suture retention and mode I cracking tests reveals a linear correlation between break initiation force and tear energy.

Samples clamped on the edge are inverted sutures. The yarn is passed through the material, the means of the provided needle being then closed by a loop through a ture holder and a plurality of nodes connected to one of the clamps in a water hole. The sample has free length L and width w. Water ture bite is centered relative to sample width. Distance from clamp L 0 = L - a. The values ​​of the geometric parameters are changed during the run. Unless otherwise indicated, the following dimensions are accepted. a = 2 mm; w = 10.8 mm; L = 20 mm; t = 0,5 mm. The suture ring was pulled at the first 0.2 mm / s. Sample was taken until a predicted power threshold was reached. When the suture wire is stretched, a tensile ratio of v = 1 mm / s is applied to both clamps up to vingspec nal sample failure. The sample was viewed by the camera during the test and at the time of the first crack propaganda recorded value from the milk bite. The BSS is determined in response. The force obtained from the time synchronized signal is determined by the load cells.

Framp mechanics tests were also accepted by the proposed procedure and protocol developers. In the present work, the tearing energy of the Glisson capsule and pericardium is the sample width 6 / 1 of the enlarged lateral cut total obtained from samples having an aspect ratio 1: 4. The moment of crack propagation was determined from the images in the post-processing stage such as reforming samples. Stretch analysis based on a log compiles the Lucas-Kanade or possible sample shifts correctly and compiles the cuffs and is used to determine the material level deformation in crack propagation. Membrane rupture is defined as Γ = Γ t 0, t 0, non-sample for thickness thickness and material tear energy. Unlike the common approach to tear energy quantification, the additional calibration feature was taken into account, the reference tension-stretch curve for the intact membrane instead of cal strech measurements in a sample region was sufficiently far from the notch tip. The membrane tension is defined as: Force per width of the remaining ligament: The results of tests at T = F / b tear the energy of the amnion. F or SE were obtained according to the values ​​reported in tear energy

Numerical Suture Tests

FE simulations in the Abaqus 6.14-1 (Simulia, Dassault Sys-BSS values ​​on the suture retention test piece geometry for the purpose of investigating. On these simulations, the material SMI was taken from the consecutive model. / 2 and length L. with symmetrical boundary conditions along the midline, mimicking the effect of clamping for one of its short edges and repeating the suture bite, the radius of which is larger than the suture wire of a semicircular hole, taken to the central location. Eight knots are removed from the part of the system.For deformable plane tensile elements (CPS8), the body is modeled as a suture wire semicircu .The large discrete rigid body was pulled during the simulation.Suture thread and suture bite between the French contact conditions. Affected and adequately kept affect the estimated BSS values ​​to minimize possible throughout the study.