Yeoh Hyperelastic Model
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Yeoh Hyperelastic Model
image:Yeoh model comp.png, 300px, Yeoh model prediction versus experimental data for natural rubber. Model parameters and experimental data froPolymerFEM.com] The Yeoh hyperelastic material model is a phenomenological model for the deformation of nearly incompressible, nonlinear Elasticity (physics), elastic materials such as rubber. The model is based on Ronald Rivlin's observation that the elastic properties of rubber may be described using a strain energy density function which is a power series in the strain invariants I_1, I_2, I_3 of the Cauchy-Green deformation tensors. The Yeoh model for incompressible rubber is a function only of I_1. For compressible rubbers, a dependence on I_3 is added on. Since a polynomial form of the strain energy density function is used but all the three invariants of the left Cauchy-Green deformation tensor are not, the Yeoh model is also called the reduced polynomial model. Yeoh model for incompressible rubbers Strain energy density functi ...
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Yeoh Model Comp
Yeoh is one spelling of the Hokkien pronunciation (; IPA: ) of the Chinese surname spelled in Mandarin Chinese Pinyin as Yáng (; see that article for the history of the surname). Another common spelling is Yeo. Both the spellings Yeoh and Yeo are common in southeast Asia, for example among Malaysian Chinese. People Notable people with the surname Yeoh include: * Benjamin Yeoh (born 1978), British playwright * Bernard Yeoh (born 1969), Malaysian sport shooter * Brenda Yeoh, Singaporean academic and geographer * Cheryl Yeoh (born 1983), Malaysian entrepreneur in California * Dawn Yeoh (born 1986), Singaporean actress * Francis Yeoh (born 1954), Malaysian businessman, son of Yeoh Tiong Lay *Hannah Yeoh (born 1979), Malaysian politician * Joanne Yeoh (born 1977), Malaysian violinist * Melvin Yeoh (born 1981), Malaysian mixed martial artist *Michelle Yeoh, Malaysian businesswoman, granddaughter of Yeoh Tiong Lay *Michelle Yeoh (born 1962), Academy Award winner Malaysian actress *Nik ...
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University Of London
The University of London (UoL; abbreviated as Lond or more rarely Londin in Post-nominal letters, post-nominals) is a collegiate university, federal Public university, public research university located in London, England, United Kingdom. The university was established by royal charter in 1836 as a degree-awarding examination board for students holding certificates from University College London, King's College London and "other such institutions, corporate or unincorporated, as shall be established for the purpose of Education, whether within the Metropolis or elsewhere within our United Kingdom". It is one of three institutions to have claimed the title of the Third-oldest university in England debate, third-oldest university in England. It moved to a federal structure with constituent colleges in 1900. It is now incorporated by its fourth (1863) royal charter and governed by the University of London Act 2018 (c. iii). The university consists of Member institutions of the Un ...
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Rubber Properties
Rubber, also called India rubber, latex, Amazonian rubber, ''caucho'', or ''caoutchouc'', as initially produced, consists of polymers of the organic compound isoprene, with minor impurities of other organic compounds. Types of polyisoprene that are used as natural rubbers are classified as elastomers. Currently, rubber is harvested mainly in the form of the latex from the Hevea brasiliensis, Pará rubber tree (''Hevea brasiliensis'') or others. The latex is a sticky, milky and white colloid drawn off by making incisions in the bark and collecting the fluid in vessels in a process called "tapping". Manufacturers refine this latex into the rubber that is ready for commercial processing. Natural rubber is used extensively in many applications and products, either alone or in combination with other materials. In most of its useful forms, it has a large stretch ratio and high resilience and also is buoyant and water-proof. Industrial demand for rubber-like materials began to out ...
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Stress Measures
In continuum mechanics, the most commonly used measure of stress is the Cauchy stress tensor, often called simply ''the'' stress tensor or "true stress". However, several alternative measures of stress can be defined: #The Kirchhoff stress (\boldsymbol). #The nominal stress (\boldsymbol). #The Piola–Kirchhoff stress tensors ##The first Piola–Kirchhoff stress (\boldsymbol). This stress tensor is the transpose of the nominal stress (\boldsymbol = \boldsymbol^T). ##The second Piola–Kirchhoff stress or PK2 stress (\boldsymbol). #The Biot stress (\boldsymbol) Definitions Consider the situation shown in the following figure. The following definitions use the notations shown in the figure. In the reference configuration \Omega_0, the outward normal to a surface element d\Gamma_0 is \mathbf \equiv \mathbf_0 and the traction acting on that surface (assuming it deforms like a generic vector belonging to the deformation) is \mathbf_0 leading to a force vector d\mathbf_0. In the ...
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Strain Energy Density Function
A strain energy density function or stored energy density function is a scalar (mathematics), scalar-valued function (mathematics), function that relates the strain energy density of a material to the deformation gradient. : W = \hat(\boldsymbol) = \hat(\boldsymbol^T\cdot\boldsymbol) =\bar(\boldsymbol) = \bar(\boldsymbol^\cdot\boldsymbol)=\tilde(\boldsymbol,\boldsymbol) Equivalently, : W = \hat(\boldsymbol) = \hat(\boldsymbol^T\cdot\boldsymbol\cdot\boldsymbol) =\tilde(\boldsymbol,\boldsymbol) where \boldsymbol is the (two-point) deformation gradient tensor, \boldsymbol is the Finite strain theory#The_right_Cauchy–Green_deformation_tensor, right Cauchy–Green deformation tensor, \boldsymbol is the Finite strain theory#The_left_Cauchy–Green_or_Finger_deformation_tensor, left Cauchy–Green deformation tensor, and \boldsymbol is the rotation tensor from the polar decomposition of \boldsymbol. For an anisotropic material, the strain energy density function \hat(\bolds ...
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Hyperelastic Material
A hyperelastic or Green elastic materialR.W. Ogden, 1984, ''Non-Linear Elastic Deformations'', , Dover. is a type of constitutive model for ideally elastic material for which the stress–strain relationship derives from a strain energy density function. The hyperelastic material is a special case of a Cauchy elastic material. For many materials, linear elastic models do not accurately describe the observed material behaviour. The most common example of this kind of material is rubber, whose stress- strain relationship can be defined as non-linearly elastic, isotropic and incompressible. Hyperelasticity provides a means of modeling the stress–strain behavior of such materials. The behavior of unfilled, vulcanized elastomers often conforms closely to the hyperelastic ideal. Filled elastomers and biological tissues are also often modeled via the hyperelastic idealization. In addition to being used to model physical materials, hyperelastic materials are also used as ficti ...
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American Chemical Society
The American Chemical Society (ACS) is a scientific society based in the United States that supports scientific inquiry in the field of chemistry. Founded in 1876 at New York University, the ACS currently has more than 155,000 members at all degree levels and in all fields of chemistry, chemical engineering, and related fields. It is one of the world's largest scientific societies by membership. The ACS is a 501(c) organization, 501(c)(3) non-profit organization and holds a congressional charter under Title 36 of the United States Code. Its headquarters are located in Washington, D.C., and it has a large concentration of staff in Columbus, Ohio. The ACS is a leading source of scientific information through its peer-reviewed scientific journals, national conferences, and the Chemical Abstracts Service. Its publications division produces over 80 Scientific journal, scholarly journals including the prestigious ''Journal of the American Chemical Society'', as well as the weekly tr ...
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Melvin Mooney Distinguished Technology Award
The Melvin Mooney Distinguished Technology Award is a professional award conferred by the ACS Rubber Division. Established in 1983, the award is named after Melvin Mooney, developer of the Mooney viscometer and of the Mooney-Rivlin hyperelastic law. The award consists of an engraved plaque and prize money. The medal honors individuals "who have exhibited exceptional technical competency by making significant and repeated contributions to rubber science and technology". Recipients 1980s * 1982 J. Roger Beatty - Senior Research Fellow at B. F. Goodrich known for development of rubber testing instruments and methods * 1983 Aubert Y. Coran - Monsanto researcher responsible for invention of thermoplastic elastomer Geolast * 1984 Eli M. Dannenberg - Cabot scientist known for contributions to surface chemistry of carbon black * 1985 William M. Hess - Columbian Chemicals Company scientist known for contributions to characterization of carbon black dispersion in rubber * 1986 ...
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Lord Corporation
LORD Corporation is a diversified technology and manufacturing company that develops adhesives, coatings, motion management devices, and sensing technologies for industries such as aerospace, automotive, oil and gas, and industrial. With world headquarters in Cary, North Carolina, LORD has approximately 3,100 employees in 26 countries and operates 19 manufacturing facilities and 10 R&D centers worldwide.
Lord Corporation
Kholos, L. (2005
''Courage and Innovation: The Story of the Lord Corporation''
Albrecht & Associates,
As of October 30, 2019, the company has been acquired by

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GenCorp
Aerojet Rocketdyne is a subsidiary of American Arms industry, defense company L3Harris that manufactures rocket, Hypersonic flight, hypersonic, and electric propulsive systems for space, defense, civil and commercial applications. Aerojet traces its origins to the General Tire and Rubber Company (later renamed GenCorp, Inc. as it diversified) established in 1915, while Rocketdyne was created as a division of North American Aviation in 1955. Aerojet Rocketdyne was formed in 2013 when Aerojet and Pratt & Whitney Rocketdyne were merged, following the latter's acquisition by GenCorp, Inc. from Pratt & Whitney. Aerojet Rocketdyne was acquired by L3Harris in July 2023 for $4.7 billion. History Background: Aerojet Several decades after it began manufacturing rubber products, General Tire & Rubber diversified into broadcasting and aeronautics. In the 1940s, the Aerojet company began experimenting with various rocket designs. For a solid-fuel rocket, they needed binders, and tur ...
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University Of Akron
The University of Akron is a public university, public research university in Akron, Ohio, United States. It is part of the University System of Ohio. As a STEM fields, STEM-focused institution, it focuses on industries such as polymers, advanced materials, and engineering. It is Carnegie Classification of Institutions of Higher Education, classified among "R2: Doctoral Universities – High research activity". The University of Akron offers about 200 Undergraduate education, undergraduate and more than 100 graduate school, graduate majors and has an enrollment of approximately 15,000 students. The university's School of Polymer Science and Polymer Engineering is housed in a 12-story reflective glass building near downtown Akron on the western edge of the main campus. UA's Archives of the History of American Psychology is an affiliate of the Smithsonian Institution. The university has three branch campuses: Wayne College in Orrville, Ohio; the Medina County University Center, in ...
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