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Torsion of flanged members with cross sections restrained against warping

Description: "The longitudinal stresses and the stiffness of flange members - I-beams, channels, and Z-bars - were investigated when these members were subjected to torque with constraint against cross-sectional warping. Measured angles of rotation agreed with corresponding calculated values in which the torsion bending factor of the cross section was involved; the agreement was better for the I-beam and the Z-bar than for the channel. Longitudinal stresses measured at the mid-span were found to agree with … more
Date: March 1943
Creator: Hill, H. N.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Plastic buckling of a long flat plate under combined shear and longitudinal compression

Description: Report presenting the condition for plastic buckling of a long flat plate under combined shear and longitudinal compression is obtained by using the theory of plastic buckling developed for simple loading, provided the ratio of shear to longitudinal compression is assumed constant during the loading process. A detailed calculation for a number of simply supported plates made of a typical aluminum alloy shows that an approximate algebraic relationship provided in the paper will suffice for deter… more
Date: December 1949
Creator: Stowell, Elbridge Z.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Tension fields in originally curved, thin sheets during shearing stresses

Description: The analysis of the stresses in the sheet and stiffeners is predicated upon the direction of the wrinkles, particularly the tensile stresses (principal stresses). This analysis and the calculation of stresses after buckling form the subject of the present article. It includes: 1) metal cylinders with closely spaced longitudinal stiffeners; 2) metal cylinders with closely spaced transverse rings.
Date: August 1935
Creator: Wagner, H. & Ballerstedt, W.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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The combinations of thermal and load stresses for the onset of permanent buckling in plates

Description: A simple and practical method for evaluating the onset of permanent buckling in plates in the presence of combined thermal and compressive load stresses is outlined. A particular application of the method shows reasonable agreement with tests of 17-7 PH stainless-steel square tubes. The results indicate that the compressive load stress which the plate can support at the onset of permanent buckling is substantially reduced as the temperature difference of the plate and adjoining members increase… more
Date: June 1957
Creator: Zender, George W. & Pride, Richard A.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Critical Combinations of Shear and Direct Axial Stress for Curved Rectangular Panels

Description: "A solution is presented for the problem of the buckling of curved rectangular panels subjected to combined shear and direct axial stress. Charts giving theoretical critical combinations of shear and direct axial stress are presented for panels having five different length-width ratios. Because the actual critical compressive stress of rectangular panels having substantial curvature is known to be much lower than the theoretical value, a semiempirical method of analysis of curved panels subject… more
Date: August 1949
Creator: Schildcrout, Murry & Stein, Manuel
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Critical Combinations of Shear and Direct Stress for Simply Supported Rectangular Flat Plates

Description: Note presenting an investigation of the buckling of a simply supported rectangular flat plate under combinations of shear and direct stress by means of an energy method. The critical combinations of stress for several length-width ratios were determined to an accuracy of about 1 percent in conjunction with a modified matrix iteration method. Results regarding the shear and longitudinal stress and shear and transverse stress are provided.
Date: March 1947
Creator: Batdorf, S. B. & Stein, Manuel
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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HYDROGEN REDISTRIBUTION IN ZIRCALOY-2 UNDER THERMAL AND MECHANICAL STRESS GRADIENTS

Description: Past and current work on the study of the movement of dissolved hydrogen in Zircaloy-2 under the influence of thermal and mechanical stress and two-phase activity gradients is reviewed, and the findings are discussed. A program of future work ia presented. (auth)
Date: January 1, 1959
Creator: Markowitz, J. M.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Pressure and Thermal Stresses at a Pipe Attachment to a Sphere

Description: Abstract: Design nomographs and equations have been prepared for determining the bending stresses and hoop stresses at the junction of a cylinder and sphere when: (1) Internal pressure exists in the sphere and (2) There is a difference in average temperature between the cylinder and the sphere. A correlation of calculated stresses and photoelastically determined stresses for models with internal pressure is presented.
Date: September 21, 1959
Creator: Deagle, Lorenzo
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Application of Genome Editing in Tomato Breeding: Mechanisms, Advances, and Prospects

Description: This article is a review presenting examples of gene editing responsible for conferring both biotic and abiotic stresses in tomato simultaneously. The literature on using this powerful technology to improve fruit quality, yield, and nutritional aspects in tomato is highlighted.
Date: January 12, 2021
Creator: Salava, Hymavathi; Thula, Sravankumar; Mohan, Vijee; Kumar, Rahul & Maghuly, Fatemeh
Item Type: Refine your search to only Article
Partner: UNT College of Science
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INTERFACE RESIDUAL STRESSES IN DENTAL ZIRCONIA USING LAUE MICRO-DIFFRACTION

Description: Due to their aesthetic value and high compressive strength, dentists have recently employed ceramics for restoration materials. Among the ceramic materials, zirconia provides high toughness and crack resistant characteristics. Residual stresses develop in processing due to factors including grain anisotropy and thermal coefficient mismatch. In the present study, polychromatic X-ray (Laue) micro-diffraction provided grain orientation and residual stresses on a clinically relevant zirconia model … more
Date: January 1, 2009
Creator: Bale, H. A.; Tamura, N.; Coelho, P. G. & Hanan, J. C.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Stress transfer problems for a fully embedded fiber with a bonded interface and bonded ends

Description: Stress transfer between fibers and matrix in fiber-reinforced composite was analyzed extensively using a shear lag model. Ends of the embedded fiber are generally assumed to debond from the matrix and stress transfer occurs only at the interface along the fiber length. The debonded ends are stress-free and the boundary condition at debonded ends in solving the stress transfer problem is trivial. When the fiber ends are bonded to the matrix, stress transfer also occurs at bonded ends, and the sr… more
Date: June 1, 1996
Creator: Hsueh, Chun-Hway
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Calculations of Stresses in GCFR Cladding under Normal Operating Conditions

Description: A modified version of the LIFE-III code, LIFE-GCFR, and classical stress-analysis techniques have been used to calculate the stresses in the GCFR cladding under normal reactor operating conditions. Several types of loadings on the cladding that occur during normal operation have been considered. These include fuel-cladding mechanical interaction, thermal stresses induced by radial and axial temperature gradients, and swelling gradient-induced stresses. The combined and individual effects of the… more
Date: November 1979
Creator: Liu, Yung Y.; Hsieh, T. C. & Billone, Michael C.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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THE CONTOUR METHOD: SIMPLE 2-D MAPPING OF RESIDUAL STRESSES

Description: We present an entirely new method for measuring residual stress that is extremely simple to apply yet more powerful than existing techniques. In this method, a part is carefully cut in two. The contour of the resulting new surface is measured to determine the displacements normal to the surface caused by the release of the residual stresses. Analytically, the opposite of these measured displacements are applied as boundary conditions to the surface in a finite element model. By Bueckner's super… more
Date: June 1, 2000
Creator: PRIME, M. & GONZALES, A.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Packaging strategies for printed circuit board components. Volume I, materials & thermal stresses.

Description: Decisions on material selections for electronics packaging can be quite complicated by the need to balance the criteria to withstand severe impacts yet survive deep thermal cycles intact. Many times, material choices are based on historical precedence perhaps ignorant of whether those initial choices were carefully investigated or whether the requirements on the new component match those of previous units. The goal of this program focuses on developing both increased intuition for generic packa… more
Date: September 1, 2011
Creator: Neilsen, Michael K. (Kansas City Plant, Kansas City, MO); Austin, Kevin N.; Adolf, Douglas Brian; Spangler, Scott W.; Neidigk, Matthew Aaron & Chambers, Robert S.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Thermal stress under high-power surface heating

Description: Estimates are made of thermal stress in a wall subjected to transient heating on one side. A detailed calculation is carried out for a flat plate heated on one face and cooled on the other. These examples furnish a guide to power absorption limits for surfaces in high-power plasma devices. Figures of merit are tabulated for various possible materials. (auth)
Date: November 1, 1973
Creator: Schivell, J. F. & Grove, D. J.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Analysis of Nuclear Power Plant Structures, Equipment, and Systems for Seismic Loads. An Assessment of the State of the Art

Description: This report provides an assessment of present analysis procedures used in the design of nuclear power plants for seismic loads. The objective is to define the most reliable analysis procedures currently available, and to indicate where additional studies can develop improved procedures at a modest cost and within a reasonable period of time.
Date: January 1, 1970
Creator: Young, G. A.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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RESULTS OF THERMAL CYCLING STRESS CORROSION TESTS OF TYPE-347 STAINLESS STEEL IN 500 F pH 10-11 LITHIUM HYDROXIDE

Description: The results of a one-month thermal cycling corrosion test of three stressed T-347 stainless steel bolts exposed to 500 deg F pH 10 to 11 lithium hydroxide are described. Tests were made to evaluate corrosion of stressed T-347 and T-304 stainless steel under conditions of water leakage to the atmosphere. (W.D.M.)
Date: January 1, 1959
Creator: Borrmann, G.H. & Galonian, G.E.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Residual stress effects in containment analysis.

Description: The manufacturing of steel containment vessels starts with the forming of flat plates into curved plates. A steel containment structure is made by welding individual plates together to form the sections that make up the complex shaped vessels. The metal forming and welding process leaves residual stresses in the vessel walls. Generally, the effect of metal forming residual stresses can be reduced or virtually eliminated by thermally stress relieving the vessel. In large containment vessels this… more
Date: April 24, 1998
Creator: Pfeiffer, P. A.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Design Criteria for Steel in Nuclear Reactors

Description: S>Criteria for stress analysis and structural design with steel for the critical components of nuclear plants are presented. An effort was made to integrate the effects on the strength of steel of the coexisting phenomena, such as mechanical and thermal loads, stress cycling and fatigue, creep and creep rupture, irradiation, and loss of ductility. Extensive use of the plastic region of steel was made for the accommodation of thermal stresses. The concept of cumulative damage in the plastic regi… more
Date: July 1, 1961
Creator: Fistedis, S.H.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Two Factors Influencing Temperature Distributions and Thermal Stresses in Structures

Description: "The influence of joint conductivity and internal radiation on temperature distribution and thermal stresses has been discussed. Joints of poor conductivity can occur in normal fabrication procedure and greatly alter temperature distributions and increase thermal stresses. On the other hand, internal radiation tends to make the temperature distributions more uniform and thereby relieves thermal stress" (p. 1).
Date: June 1957
Creator: Brooks, William A., Jr.; Griffith, George E. & Strass, H. Kurt
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Analysis of elastic thermal stresses in thin plate with spanwise and chordwise variations of temperature and thickness

Description: From Introduction: "The object of the present paper is to present an approximate method for calculating accurately the thermal stresses in a thin plate with both chordwise and spanwise variations in temperature and chordwise but restricted spanwise variations in thickness."
Date: November 1956
Creator: Mendelson, Alexander & Hirschberg, Marvin
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Analytical determination of the natural coupled frequencies and mode shapes and the response to oscillating forcing functions of tandem helicopters

Description: Report presenting a method for the analytical determination of the natural coupled frequencies and mode shapes of vibrations in the vertical plane of tandem helicopters. That information is then used to calculate the response of the helicopter to applied oscillation forces. Calculated response curves show how the vibrations of the cockpit vary with frequency and method of application of oscillating forces applied at the hubs.
Date: December 1956
Creator: Brooks, George W. & Houbolt, John C.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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