Modeling and Simulation for Material Selection and Mechanical Design

2003 ◽  
Keyword(s):  
Modeling And Simulation ◽  
Mechanical Design ◽  
Material Selection

scholarly journals Mechanical Design and Performance Analyses of a Rubber-Based Peristaltic Micro-Dosing Pump

Actuators ◽  
2021 ◽  
Vol 10 (8) ◽  
pp. 198
Author(s):  
Thomas Zehetbauer ◽  
Andreas Plöckinger ◽  
Carina Emminger ◽  
Umut D. Çakmak
Keyword(s):  
Fluid Transport ◽  
Mechanical Design ◽  
Material Selection ◽  
Selection Process ◽  
Thermoplastic Elastomer ◽  
Peristaltic Pump ◽  
Transport Channel ◽  
Soft Layer ◽  
Pump System ◽  
Pump Design

Low pressure fluid transport (1) applications often require low and precise volumetric flow rates (2) including low leakage to reduce additional costly and complex sensors. A peristaltic pump design (3) was realized, with the fluid’s flexible transport channel formed by a solid cavity and a wobbling plate comprising a rigid and a soft layer (4). In operation, the wobbling plate is driven externally by an electric motor, hence, the soft layer is contracted and unloaded (5) during pump-cycles transporting fluid from low to high pressure sides. A thorough characterization of the pump system is required to design and dimension the components of the peristaltic pump. To capture all these parameters and their dependencies on various operation-states, often complex and long-lasting dynamic 3D FE-simulations are required. We present, here, a holistic design methodology (6) including analytical as well as numerical calculations, and experimental validations for a peristaltic pump with certain specifications of flow-rate range, maximum pressures, and temperatures. An experimental material selection process is established and material data of candidate materials (7) (liquid silicone rubber, acrylonitrile rubber, thermoplastic-elastomer) are directly applied to predict the required drive torque. For the prediction, a semi-physical, analytical model was derived and validated by characterizing the pump prototype.

The Challenge of Elastomer Seals for Blowout Preventer BOP and Wellhead/Christmas Trees under High Temperature

2021 ◽  
Author(s):  
Xuming Chen ◽  
Ray Zonoz ◽  
Hamid A. Salem
Keyword(s):  
High Pressure ◽  
High Temperature ◽  
Mechanical Design ◽  
Material Selection ◽  
Low Cost ◽  
American Petroleum Institute ◽  
Fourth Edition ◽  
Christmas Trees ◽  
Blowout Preventer ◽  
Power Law Equation

Abstract It is critically important for elastomer sealing components in blowout preventers (BOP) and wellheads to meet the pressure and temperature rating requirements under the newly released American Petroleum Institute (API) standards, API 16A (fourth edition) and API 6A (twenty-first edition) respectively. Extrusion resistance under high pressure and high temperature is one of the most critical challenge for the elastomer sealing components to meet the above API standards. This challenge is related to the basic properties of elastomer materials and mechanical design of the sealing components. This paper outlines how a simple and low-cost approach was developed to evaluate extrusion resistance of elastomer sealing components, and the correlation between critical tear pressure and extrusion gap of the two elastomers seals was evaluated using a power law equation. This correlation revealed that the above challenges of elastomer sealing components for BOPs and wellheads/Christmas trees is related to the weak strength of elastomers under high temperature and large clearances (extrusion gap) in current designs. New materials and/or new mechanical design to overcome such a challenge were also provided and discussed in this paper. The paper will help practicing engineers understand the challenge of material selection, mechanical design, and API testing as well as better understand the capability and limitation of sealing components for blowout preventors and wellhead applications under high pressure and/or high temperature (HPHT).

scholarly journals A novel design on polymeric material recycling technology

2021 ◽  
Vol 43 ◽  
pp. e56211
Author(s):  
Kursat Tanriver ◽  
Savas Dilibal ◽  
Haydar Sahin ◽  
Aykut Kentli
Keyword(s):  
System Design ◽  
Mechanical Design ◽  
Material Selection ◽  
Design Stage ◽  
Waste Collection ◽  
Mechatronic System ◽  
Polymer Waste ◽  
Separation Systems ◽  
Material Recycling ◽  
Waste Separation

The necessity for recycling of wastes has increased nowadays and there are various solutions according to the types of wastes which are presented accordingly. By observing these solutions, the recycling system from the waste collection and separation system of the long-term disappearing of polymer waste to the additive manufacturing design stage has been indicated. Waste collection and separation systems have been reviewed and systems to be used effectively in the systematic way have been exemplified. Among four different separating systems which are with rotating, rail and fixed containers, fixed container four-sorting waste separation systems were chosen and developed as a mechatronic system design. The mechatronic system design is very prominent in order to create efficient and economical mechanisms in fixed-container four-sorting waste separation collection system (FCWS) applications. In addition, physical mechatronic system design (MSD), mechanical design, material selection, electrical electronic design sub-heading and cost analysis were made. In this study, the necessity and importance of the waste separation plants are revealed

Tensile Testing for Design

2004 ◽  
pp. 91-100
Keyword(s):  
Mechanical Testing ◽  
Tensile Testing ◽  
Mechanical Design ◽  
Material Selection ◽  
Mechanical Test ◽  
General Relation ◽  
Test Methods ◽  
Design Criterion ◽  
Property Data ◽  
Basic Objective

Abstract This chapter introduces the basic concepts of mechanical design and its general relation with the properties derived from tensile testing. It begins with a description of the basic objective of product design. Next, a simple tie bar is used to illustrate the application of mechanical property data to material selection and design and to highlight the general implications for mechanical testing. Material subjected to the basic stress conditions is considered in order to establish design approaches and mechanical test methods, first in static loading and then in dynamic loading and aggressive environments. The chapter then briefly describes design criteria for some basic property combinations such as strength, weight, and costs as well as another important design criterion, that is stiffness in tension. Additionally, it describes the processes involved in mechanical testing for stress at failure and elastic modulus. Finally, the chapter examines the correlation between hardness and strength.

Material selection in engineering design based on nearest neighbor search under uncertainty: a spatial approach by harmonizing the Euclidean and Taxicab geometry

2018 ◽  
Vol 33 (03) ◽  
pp. 238-246
Author(s):  
Debasis Das ◽  
Somnath Bhattacharya ◽  
Bijan Sarkar
Keyword(s):  
Storage Tank ◽  
Nearest Neighbor ◽  
Mechanical Design ◽  
Material Selection ◽  
Nearest Neighbor Search ◽  
Functional Requirements ◽  
Cryogenic Storage ◽  
Neighbor Search ◽  
Spatial Approach ◽  
Taxicab Geometry

AbstractMaterial selection is a fundamental step in mechanical design that has to meet all the functional requirements of the component. Multiple-attributed decision-making (MADM) processes are already well established to choose the preeminent alternative from the finite set of alternatives, but there is some lack of geometrical evidence if the alternatives are considered as multi-dimensional points. In this paper, a fresh spatial approach is proposed based on nearest neighbor search (NNS) in which the nearness parameter is considered as a Manhattan norm (Taxicab geometry) in turn which is a function of the Euclidean norm and cosine similarity to raise a preeminent alternative under the MADM framework. Cryogenic storage tank and flywheel are considered as two case studies to check the validity of the proposed spatial approach based on NNS in material selection. The result shows the right choice for the cryogenic storage tank is the austenitic steel (SS 301 FH), and for the flywheel, it is a composite material (Kevler 49-epoxy FRP) those are consistent with the real-world practice and the results are compared with other MADM methods of previous works.

Chronic measurement of epidural pressure with an induction-powered oscillator transducer

1976 ◽  
Vol 44 (4) ◽  
pp. 465-478 ◽  
Author(s):  
H. Grady Rylander ◽  
H. Lyndon Taylor ◽  
John P. Wissinger ◽  
Jim L. Story
Keyword(s):  
Linear Function ◽  
Mechanical Design ◽  
Material Selection ◽  
Fluid Pressure ◽  
Zero Drift ◽  
Intraventricular Pressure ◽  
Epidural Pressure ◽  
Content Type ◽  
Metal Bellows ◽  
Wedge Pressure

✓ An induction-powered oscillator transducer (IPOT) was designed for the chronic measurement of epidural pressure. The transducer was completely implantable so all pressure measurements were made through the intact skin. The IPOT had a linear pressure range from −50 to +200 cm H2O, was sensitive to 1 mm H2O, and had a zero drift of less than 1 mm H2O/day under full load. Zero drift was minimized by using a hermetically-sealed metal bellows transducing element which was chemically treated to prevent corrosion and creep. The correlation between epidural pressure and intraventricular pressure was determined during the first 24 hours after implantation in six dogs. Epidural pressure was found to be a linear function of intraventricular fluid pressure. Epidural pressure and intraventricular pressure were essentially equal provided the epidural wedge pressure was minimized by proper insertion of the transducer. The correlation between epidural pressure and intraventricular pressure was determined after chronic implantation in five dogs. Epidural pressure was a linear function of intraventricular pressure in the chronically implanted dogs, but epidural pressure was not equal to intraventricular pressure. After chronic implantation, the epidural pressure transducer was not responsive to changes in intraventricular pressure because of mechanical changes in the dura. The dura became stiff and noncompliant. Maximum correlation between epidural pressure and intraventricular fluid pressure in chronic implantations will depend on judicious material selection and mechanical design at the transducer-dura interface.

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