Abstract The fiber optic wire package is the core component of guided rockets. Due to non-uniformity diameter, winding process prone defects, which affects missile launch process. In this paper, a finite element simulation model for established. accuracy verified by comparing it with analytical contact pressure between layers. Then models considering diameter tolerance are established analyze e...

Gravity drainage is the main mechanism which controls the oil recovery from fractured reservoirs in both gas-cap drive and gas injection processes. The liquid bridge formed between two adjacent matrix blocks is responsible for capillary continuity phenomenon. The accurate determination of gas-liquid interface profile of liquid bridge is crucial to predict fracture capillary pressure precisely. ...

An important mechanism reducing the lifetime of the deepdrawing tools is material transfer from the workpiece to the tool, resulting in the buildup of lumps on the tool surface. In this study, a lump growth model, based on transfer mechanisms observed in experiments, is developed. The development of the summit height distribution of the tool surface is calculated from the growth behavior of the...

Feedforward neural networks were used to model three parameters during the Space Shuttle Main Engine startup transient. The three parameters were the main combustion chamber pressure, a controlled parameter; the high pressure oxidizer turbine discharge temperature, a redlined parameter; and the high pressure fuel pump discharge pressure, a failure-indicating performance parameter. Network input...

A new contact-mechanics-based model for chemical–mechanical polishing is presented. According to this model, the local polish rate is controlled by the pressure distribution between features on the wafer and the polishing pad. The model uses an analysis based on the work by Greenwood to evaluate this pressure distribution taking into account pad compliance and roughness. Using the model, the e2...

Abstract The role of friction on wear evolution is manifold since it interplays with lubrication regime, nominal contact point, and pressure distribution. Nevertheless, in the literature many models simulate assuming frictionless conditions to simplify analyses. That assumption, physically not realistic, often appears as a contradiction, permitted numerical simulations where can be considered i...

Distribution of contact pressure between the bipolar plate and gas diffusion layer considerably affect the performance of proton exchange membrane fuel cell. In this regard, an adaptive neuro-fuzzy inference system (ANFIS) is developed to predict the contact pressure distribution on the gas diffusion layer due to dimensional errors of the bipolar plate ribs in a proton exchange membrane fuel ce...