In the presented work, author analyzed indicators and characteristics of maintainability large units assembly heavy engineering products. The calculation operational distribution law recovery maintenance time are given. paper shows that random nature production factors predetermined widespread use in theory reliability mathematical apparatus methods probability, functions statistics. particular...

This paper proposes a new expression of discrete-mechanical quantities in a granular assembly and a new formulation of the graph-theoretical approach in the mechanics of granular materials. New mechanical quantities for void, i.e., void force, void displacement, etc., are introduced and relations between discrete-mechanical quantities of particle, contact and void are given in a very simple for...

A fast design variation technique for mechanical systems is presented. It is used to interactively optimize mechanical characteristics while “self-assembling” or satisfying large systems of mechanical constraints. The high speed method is central to providing inverse dynamics force feedback in haptics and control applications. Performance advantages with the use of augmented coordinates for inv...

loading conditions and complex geometry have led the cylinder heads to become the most challenging parts of diesel engines. one of the most important durability problems in diesel engines is due to the cracks valves bridge area. the purpose of this study is a thermo-mechanical analysis of cylinder heads of diesel engines using a two-layer viscoplasticity model. in this article, mechanical prope...

Achieving an appropriate assembly sequence needs deep verification for its physical feasibility. For this purpose, industrial engineers use several assembly predicates; namely, liaison, geometric feasibility, stability and mechanical feasibility. However, testing an assembly sequence for these predicates requires huge assembly information. Extracting such assembly information from an assembled ...

A millimeter thin rubber-like solid-state lighting module is reported. The fabrication of the lighting module incorporates assembly and electrical connection of light-emitting diodes (LEDs). The assembly is achieved using a roll-to-roll fluidic self-assembly. The LEDs are sandwiched in-between a stretchable top and bottom electrode to relieve the mechanical stress. The top contact is realized u...