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Alan Needleman
Alan Needleman (born September 2, 1944) is a professor of materials science & engineering at Texas A&M University. Prior to 2009, he was Florence Pirce Grant University Professor of Mechanics of Solids and Structures at Brown University in Providence, Rhode Island. Early life and education Needleman received his B.S. from the University of Pennsylvania in 1966, an M.S. and Ph.D. from Harvard University in 1967 and 1970 respectively, advised by John W. Hutchinson. Research and career He was an instructor and assistant professor in the Department of Applied Mathematics at the Massachusetts Institute of Technology The Massachusetts Institute of Technology (MIT) is a private land-grant research university in Cambridge, Massachusetts. Established in 1861, MIT has played a key role in the development of modern technology and science, and is one of the ... from 1970 to 1975. He was a professor of engineering at Brown University starting in 1975, and served as the de ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Harvard University
Harvard University is a private Ivy League research university in Cambridge, Massachusetts. Founded in 1636 as Harvard College and named for its first benefactor, the Puritan clergyman John Harvard, it is the oldest institution of higher learning in the United States and one of the most prestigious and highly ranked universities in the world. The university is composed of ten academic faculties plus Harvard Radcliffe Institute. The Faculty of Arts and Sciences offers study in a wide range of undergraduate and graduate academic disciplines, and other faculties offer only graduate degrees, including professional degrees. Harvard has three main campuses: the Cambridge campus centered on Harvard Yard; an adjoining campus immediately across Charles River in the Allston neighborhood of Boston; and the medical campus in Boston's Longwood Medical Area. Harvard's endowment is valued at $50.9 billion, making it the wealthiest academic institution in the world. Endowment inco ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Microstructure
Microstructure is the very small scale structure of a material, defined as the structure of a prepared surface of material as revealed by an optical microscope above 25× magnification. The microstructure of a material (such as metals, polymers, ceramics or composites) can strongly influence physical properties such as strength, toughness, ductility, hardness, corrosion resistance, high/low temperature behaviour or wear resistance. These properties in turn govern the application of these materials in industrial practice. Microstructure at scales smaller than can be viewed with optical microscopes is often called nanostructure, while the structure in which individual atoms are arranged is known as crystal structure. The nanostructure of biological specimens is referred to as ultrastructure. A microstructure’s influence on the mechanical and physical properties of a material is primarily governed by the different defects present or absent of the structure. These defects can tak ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
American Academy Of Mechanics
American(s) may refer to: * American, something of, from, or related to the United States of America, commonly known as the "United States" or "America" ** Americans, citizens and nationals of the United States of America ** American ancestry, people who self-identify their ancestry as "American" ** American English, the set of varieties of the English language native to the United States ** Native Americans in the United States, indigenous peoples of the United States * American, something of, from, or related to the Americas, also known as "America" ** Indigenous peoples of the Americas * American (word), for analysis and history of the meanings in various contexts Organizations * American Airlines, U.S.-based airline headquartered in Fort Worth, Texas * American Athletic Conference, an American college athletic conference * American Recordings (record label), a record label previously known as Def American * American University, in Washington, D.C. Sports teams Soccer * Ba ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
American Society Of Mechanical Engineers
The American Society of Mechanical Engineers (ASME) is an American professional association that, in its own words, "promotes the art, science, and practice of multidisciplinary engineering and allied sciences around the globe" via "continuing education, training and professional development, codes and standards, research, conferences and publications, government relations, and other forms of outreach." ASME is thus an engineering society, a standards organization, a research and development organization, an advocacy organization, a provider of training and education, and a nonprofit organization. Founded as an engineering society focused on mechanical engineering in North America, ASME is today multidisciplinary and global. ASME has over 85,000 members in more than 135 countries worldwide. ASME was founded in 1880 by Alexander Lyman Holley, Henry Rossiter Worthington, John Edison Sweet and Matthias N. Forney in response to numerous steam boiler pressure vessel failures. Kno ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
National Academy Of Engineering
The National Academy of Engineering (NAE) is an American nonprofit, non-governmental organization. The National Academy of Engineering is part of the National Academies of Sciences, Engineering, and Medicine, along with the National Academy of Sciences (NAS), the National Academy of Medicine, and the National Research Council (now the program units of NASEM). The NAE operates engineering programs aimed at meeting national needs, encourages education and research, and recognizes the superior achievements of engineers. New members are annually elected by current members, based on their distinguished and continuing achievements in original research. The NAE is autonomous in its administration and in the selection of its members, sharing with the rest of the National Academies the role of advising the federal government. History The National Academy of Sciences was created by an Act of Incorporation dated March 3, 1863, which was signed by then President of the United States ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mechanics
Mechanics (from Ancient Greek: μηχανική, ''mēkhanikḗ'', "of machines") is the area of mathematics and physics concerned with the relationships between force, matter, and motion among physical objects. Forces applied to objects result in displacements, or changes of an object's position relative to its environment. Theoretical expositions of this branch of physics has its origins in Ancient Greece, for instance, in the writings of Aristotle and Archimedes (see History of classical mechanics and Timeline of classical mechanics). During the early modern period, scientists such as Galileo, Kepler, Huygens, and Newton laid the foundation for what is now known as classical mechanics. As a branch of classical physics, mechanics deals with bodies that are either at rest or are moving with velocities significantly less than the speed of light. It can also be defined as the physical science that deals with the motion of and forces on bodies not in the quantum realm ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Subra Suresh
Subra Suresh is an Indian-born American bioengineer, materials scientist, and academic administrator. On 1 January 2018, he was inaugurated as the fourth President of Singapore's Nanyang Technological University (NTU), where he is also the inaugural Distinguished University Professor. Subra Suresh plans on stepping down from his role as the President of NTU at the end of 2022. He was the Vannevar Bush Professor of Engineering at the Massachusetts Institute of Technology (MIT), and Dean of the School of Engineering at MIT from 2007 to 2010 before being appointed as Director of the National Science Foundation (NSF) by Barack Obama, where he served from 2010 to 2013. He was the president of Carnegie Mellon University (CMU) from 2013 to 2017. Suresh was elected to the US National Academy of Engineering in 2002, to the National Academy of Sciences in 2012 and to the Institute of Medicine (now the National Academy of Medicine) in 2013. He is one of a very small number of Americans ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Viggo Tvergaard
Viggo, also spelled Wiggo, is a Nordic male name. There are two main theories about its origins: * a latinised form of the Old Norse name Vigge, which is also found in the form of other Germanic names, such as Ludvig. It stems from old Norse 'vig', meaning "battle, fight". * a variant of the Icelandic name Vöggur, coming from old Norse 'vöggr', "one who lies in a cradle". People named Viggo include: * Viggo Bielefeldt (1851–1909), Danish composer * Viggo Brøndal (1887–1942), Danish philologist, professor of Romance languages and literature * Viggo Brodersen (1879–1965), Danish composer and pianist *Viggo Brun (1885–1978), Norwegian mathematician * Viggo Christensen(1880–1967), the first Lord Mayor of Copenhagen * Viggo Dibbern (1900–1981), Danish gymnast and Olympic medalist *Viggo Fausböll (1821–1908), Danish translator and Indologist * Viggo Frederiksen (1916–1993), Danish boxer and Olympic competitor * Viggo Hagstrøm (1954–2013), Norwegian legal schol ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Brittle
A material is brittle if, when subjected to stress, it fractures with little elastic deformation and without significant plastic deformation. Brittle materials absorb relatively little energy prior to fracture, even those of high strength. Breaking is often accompanied by a sharp snapping sound. When used in materials science, it is generally applied to materials that fail when there is little or no plastic deformation before failure. One proof is to match the broken halves, which should fit exactly since no plastic deformation has occurred. Brittleness in different materials Polymers Mechanical characteristics of polymers can be sensitive to temperature changes near room temperatures. For example, poly(methyl methacrylate) is extremely brittle at temperature 4˚C, but experiences increased ductility with increased temperature. Amorphous polymers are polymers that can behave differently at different temperatures. They may behave like a glass at low temperatures (the glassy ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Fast Fracture
In structural engineering and material science, fast fracture is a phenomenon in which a flaw (such as a crack) in a material expands quickly, and leads to catastrophic failure of the material. It proceeds in high speed and requires a relatively small amount of accumulated strain energy, making it a dangerous failure mode. Flaw Stress (physics), Stress acting on a material when fast fracture occurs is less than the material's Yield (engineering), yield stress. A very representative example of this is what happens when poking a blown up balloon with a needle, that is, fast fracture of the balloon's material. The energy in the balloon comes from the compressed gas inside it and the energy stored in the rubber membrane itself. The introduction of the flaw, which in this case is the pin prick, would lead to the explosion as the membrane fails by fast fracture. However, if the same flaw is introduced to a balloon with less energy - as in the case of a partially inflated balloon - the fa ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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