The purpose of this paper is to numerically investigate the fatigue life and crack growth path 2024 aluminum plate riveted joints. For purpose, according field observations, parameters affecting are obtained. Relevant geometric such as rivet shank length, hole diameter dimensional tolerances, well location pattern rivets material joints studied. In study, modeling performed calculate equivalent...

‎in this paper first we define the morphism between geometric spaces in two different types‎. ‎we construct two categories of $uu$ and $l$ from geometric spaces then investigate some properties of the two categories‎, ‎for instance $uu$ is topological‎. ‎the relation between hypergroups and geometric spaces is studied‎. ‎by constructing the category $qh$ of $h_{v}$-groups we answer the question...

According to the American Society of Mechanical Engineers [1], tolerance is the total amount by which a specific dimension is permitted to vary from its nominal value. Tolerance allocation, also called tolerance synthesis, is carried out at the process planning stage in order to distribute the component’s design-specified tolerances, also called blue print (BP) tolerances, among the various ope...

According to the current standards for prefabricated buildings, dimensional tolerances of components are usually determined by experience, lacking a theoretical basis. This work demonstrates mathematical distribution deviations precast concrete measuring their three-dimensional dimensions. Utilizing Kolmogorov–Smirnov test, cumulative function dimension was evaluated. In response fact that tole...

A linear accelerator vendor and the AAPM TG-142 report propose that quality assurance testing for image-guided devices such megavoltage cone-beam CT (MV-CBCT) be conducted on a monthly basis. In clinical settings, however, unpredictable errors such as image artifacts can occur even when quality assurance results performed at this frequency are within tolerance limits. Here, we evaluated the ima...

In this paper, we present an ef®cient sub-optimal algorithm for ®tting smooth planar parametric curves by G 1 arc splines. To ®t a parametric curve by an arc spline within a prescribed tolerance, we ®rst sample a set of points and tangents on the curve adaptively as well as with enough density, so that an interpolation biarc spline curve can be with any desired high accuracy. Then, we construct...

Tolerance plays a major role in the manufacturing industry, as it affects product design, manufacturing, and quality of the product. This paper considers product design, manufacturing, and quality simultaneously, and introduces a concurrent approach for tolerance allocation using evolutionary algorithms. A non-linear model that minimizes the combination of manufacturing cost and quality loss si...