133,067 research outputs found
2-D differential quadrature solution for vibration analysis of functionally graded conical, cylindrical shell and anular plate structures
No full textThis paper focuses on the dynamic behavior of functionally graded conical, cylindrical shells and annular plates. The last two structures are obtained as special cases of the conical shell formulation. The first-order shear deformation theory (FSDT) is used to analyze the above moderately thick structural elements. The treatment is developed within the theory of linear elasticity, when materials are assumed to be isotropic and inhomogeneous through the thickness direction. The two-constituent functionally graded shell consists of ceramic and metal that are graded through the thickness, from one surface of the shell to the other. Two different power-law distributions are considered for the ceramic volume fraction. The homogeneous isotropic material is inferred as a special case of functionally graded materials (FGM). The governing equations of motion, expressed as functions of five kinematic parameters, are discretized by means of the generalized differential quadrature (GDQ) method. The discretization of the system leads to a standard linear eigenvalue problem, where two independent variables are involved without using the Fourier modal expansion methodology. For the homogeneous isotropic special case, numerical solutions are compared with the ones obtained using commercial programs such as Abaqus, Ansys, Nastran, Straus, Pro/Mechanica. Very good agreement is observed. Furthermore, the convergence rate of natural frequencies is shown to be very fast and the stability of the numerical methodology is very good. Different typologies of non-uniform grid point distributions are considered. Finally, for the functionally graded material case numerical results illustrate the influence of the power-law exponent and of the power-law distribution choice on the mechanical behavior of shell structures
Lehigh Coal and Navigation Company Records - Item 1685: Plot of the Village of Lausanne: Northhampton County, Pennsylvania at the head of the Lehigh Navigation
No full textThis map shows a plot of the village of Lausanne in Northampton County, Pennsylvania at the head of the Lehigh Navigation from Childs & Inman\u27s Press. The lands and railroad of the Mauch Chunk Company are displayed
Loading flatcars, Inman-Poulsen Lumber Company, Oregon, approximately 1929
No full textThis company had operations in Keasey and Vernonia, Oregon and Kelso, Washington. Headquarters in Portland.
Note from inventory: See also: Warren Spruce Division
Caption on image: No 18, Inman + Polson Lmbr Co
PH Coll 516.1566The Inman-Poulsen Lumber Company was a logging operation based in Portland, Oregon with camps in Keasey, Vernonia, and Kelso, Washington, among others. The company was founded by Robert D. Inman and Johan Poulsen in 1890. Inman was born in 1852 in Ohio. Inman was the president of the company and would remain so until his death in 1920. Poulsen was born as Johannes Poulsen in what is now Denmark. The company built a sawmill on the east side of the Willamette River in Portland. The mill burned down in 1896 but was quickly rebuilt. The company largely operated in Columbia County and was known to be one of the only logging operators in the Vernonia area that used conventional flatcars equipped with air brakes instead of disconnected trucks. The company was bought out in 1954 by the Georgia-Pacific Lumber Company
High riggers, Inman-Poulsen Lumber Company, Oregon, approximately 1929
No full textThis company had operations in Keasey and Vernonia, Oregon and Kelso, Washington. Headquarters in Portland.
Note from inventory: See also: Warren Spruce Division
Caption on image: No. 8, Inman Polson Lmbr Co
PH Coll 516.1556The Inman-Poulsen Lumber Company was a logging operation based in Portland, Oregon with camps in Keasey, Vernonia, and Kelso, Washington, among others. The company was founded by Robert D. Inman and Johan Poulsen in 1890. Inman was born in 1852 in Ohio. Inman was the president of the company and would remain so until his death in 1920. Poulsen was born as Johannes Poulsen in what is now Denmark. The company built a sawmill on the east side of the Willamette River in Portland. The mill burned down in 1896 but was quickly rebuilt. The company largely operated in Columbia County and was known to be one of the only logging operators in the Vernonia area that used conventional flatcars equipped with air brakes instead of disconnected trucks. The company was bought out in 1954 by the Georgia-Pacific Lumber Company
Woods crew, Inman-Poulsen Lumber Company, Oregon, approximately 1929
No full textThis company had operations in Keasey and Vernonia, Oregon and Kelso, Washington. Headquarters in Portland.
Note from inventory: See also: Warren Spruce Division
Caption on image: Inman + Polson Log Co No 6
PH Coll 516.1571The Inman-Poulsen Lumber Company was a logging operation based in Portland, Oregon with camps in Keasey, Vernonia, and Kelso, Washington, among others. The company was founded by Robert D. Inman and Johan Poulsen in 1890. Inman was born in 1852 in Ohio. Inman was the president of the company and would remain so until his death in 1920. Poulsen was born as Johannes Poulsen in what is now Denmark. The company built a sawmill on the east side of the Willamette River in Portland. The mill burned down in 1896 but was quickly rebuilt. The company largely operated in Columbia County and was known to be one of the only logging operators in the Vernonia area that used conventional flatcars equipped with air brakes instead of disconnected trucks. The company was bought out in 1954 by the Georgia-Pacific Lumber Company
Compacted oxide layer formation under conditions of limited debris retention at the wear interface during high temperature sliding wear of superalloys
No full textFor many applications, including power generation, aerospace and the automobile industry, high temperature wear provides serious difficulties where two or more surfaces are able to move relative to one another. It is increasingly the case that with for example, aerospace applications, demands for ever more powerful and efficient engines that thus operate at higher temperatures, conventional lubrication is no longer sufficient to prevent direct contact between metallic surfaces and consequent accelerated wear. One phenomenon that has been observed to reduce metallic contact and thus high temperature wear and friction is the formation of what are termed ‘glazes’, essentially layers of compacted oxide wear debris that becomes sintered together to form a low friction wear resistant oxide surface. This thesis studies the nature of the wear encountered with four different combinations of Superalloys, slid together using a ‘block-on-cylinder’ configuration developed for accelerated simulation testing of car engine ‘valve-on-valve-seat’ wear. Predominantly, Nimonic 80A and Incoloy MA956 were used as sample materials and Stellite 6 and Incoloy 800HT were used as counterface materials
Erie steam shovel and crew, Inman-Poulsen Lumber Company, Oregon, approximately 1929
No full textThis company had operations in Keasey and Vernonia, Oregon and Kelso, Washington. Headquarters in Portland.
Note from inventory: See also: Warren Spruce Division
Caption on image: No 71, Inman + Polson Lmbr Co
PH Coll 516.1581The Inman-Poulsen Lumber Company was a logging operation based in Portland, Oregon with camps in Keasey, Vernonia, and Kelso, Washington, among others. The company was founded by Robert D. Inman and Johan Poulsen in 1890. Inman was born in 1852 in Ohio. Inman was the president of the company and would remain so until his death in 1920. Poulsen was born as Johannes Poulsen in what is now Denmark. The company built a sawmill on the east side of the Willamette River in Portland. The mill burned down in 1896 but was quickly rebuilt. The company largely operated in Columbia County and was known to be one of the only logging operators in the Vernonia area that used conventional flatcars equipped with air brakes instead of disconnected trucks. The company was bought out in 1954 by the Georgia-Pacific Lumber Company
Crew with donkey engine, Inman-Poulsen Lumber Company, Oregon, approximately 1929
No full textThis company had operations in Keasey and Vernonia, Oregon and Kelso, Washington. Headquarters in Portland.
Note from inventory: See also: Warren Spruce Division
Caption on image: No 4, Inman Polson Lmbr Co
PH Coll 516.1563The Inman-Poulsen Lumber Company was a logging operation based in Portland, Oregon with camps in Keasey, Vernonia, and Kelso, Washington, among others. The company was founded by Robert D. Inman and Johan Poulsen in 1890. Inman was born in 1852 in Ohio. Inman was the president of the company and would remain so until his death in 1920. Poulsen was born as Johannes Poulsen in what is now Denmark. The company built a sawmill on the east side of the Willamette River in Portland. The mill burned down in 1896 but was quickly rebuilt. The company largely operated in Columbia County and was known to be one of the only logging operators in the Vernonia area that used conventional flatcars equipped with air brakes instead of disconnected trucks. The company was bought out in 1954 by the Georgia-Pacific Lumber Company
Two truck Shay locomotive #805, Inman-Poulsen Lumber Company, Oregon, approximately 1929
No full textThis company had operations in Keasey and Vernonia, Oregon and Kelso, Washington. Headquarters in Portland.
Note from inventory: See also: Warren Spruce Division
Caption on image: No 11, Inman + Polson Log Co
PH Coll 516.1574The Inman-Poulsen Lumber Company was a logging operation based in Portland, Oregon with camps in Keasey, Vernonia, and Kelso, Washington, among others. The company was founded by Robert D. Inman and Johan Poulsen in 1890. Inman was born in 1852 in Ohio. Inman was the president of the company and would remain so until his death in 1920. Poulsen was born as Johannes Poulsen in what is now Denmark. The company built a sawmill on the east side of the Willamette River in Portland. The mill burned down in 1896 but was quickly rebuilt. The company largely operated in Columbia County and was known to be one of the only logging operators in the Vernonia area that used conventional flatcars equipped with air brakes instead of disconnected trucks. The company was bought out in 1954 by the Georgia-Pacific Lumber Company
- …
