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  • 1
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    MERCURY SPACECRAFT PRE-LAUNCH PREPARATIONS. II - AT THE LAUNCH SITE (1963)
    In:  Other Sources
    Details
    Publication Date: 2019-05-10
    Description: Discussion of mercury prelaunch preparations at the launch site, including the checkout philosophies and procedures
    Keywords: STRUCTURAL MECHANICS
    Type: AIAA PAPER 63072
    Format: text
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  • 2
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    AN APPROXIMATE ANALYSIS OF A THIN-SPHERICAL SHELL LOADED AS A CANTILEVER BEAM (1962)
    In:  CASI
    Details
    Publication Date: 2008-08-25
    Description: A thin-spherical shell loaded as a cantilever beam-stresses, deflections, and influence coefficients
    Keywords: STRUCTURAL MECHANICS
    Type: JPL-TR-32-318
    Format: text
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  • 3
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    ANALYSIS OF A CIRCULAR, CYLINDRICAL SHELL LOADED AS A SIMPLE CANTILEVER (1961)
    In:  CASI
    Details
    Publication Date: 2008-08-25
    Description: A circular, cylindrical shell loaded as a simple cantilever
    Keywords: STRUCTURAL MECHANICS
    Type: JPL-TR-32-64
    Format: text
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  • 4
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    VICONOPT - Program for exact vibration and buckling analysis or design of prismatic plate assemblies (1991)
    In:  Other Sources
    Details
    Publication Date: 2011-08-24
    Keywords: STRUCTURAL MECHANICS
    Type: AIAA Journal (ISSN 0001-1452); 29; 1927
    Format: text
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  • 5
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    Constructing second-order structural models with specified mass submatrix condition numbers (1990)
    In:  Other Sources
    Details
    Publication Date: 2011-08-19
    Description: This paper presents a simple new algorithm for constructing second-order models for any given flexible structure, with these models satisfying the constraint that each leading principal submatrix of the mass matrix must have a specified condition number. Now, the effects of rounding errors in practical computation generally increase with increasing condition number, i.e. as the matrix considered approaches singularity. Thus, the new models should prove useful for the systematic testing of the numerical properties of many algorithms in the dynamics and control of flexible structures.
    Keywords: STRUCTURAL MECHANICS
    Type: Communications in Applied Numerical Methods (ISSN 0748-8025); 6; 77-81
    Format: text
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  • 6
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    Exact Bernoulli-Euler static stiffness matrix for a range of tapered beam-columns (1986)
    In:  Other Sources
    Details
    Publication Date: 2011-08-19
    Description: The static stiffnesses for torsional and flexural deformation of a tapered beam under axial loading are determined analytically, extending the Bernoulli-Euler/Bessel-function approach of Banerjee and Williams (1985). The derivation of the expressions is explained in detail, and numerical results for sample problems are presented in tables and shown to be in excellent agreement with those obtained using stepped beams of 400 or 500 elements.
    Keywords: STRUCTURAL MECHANICS
    Type: International Journal for Numerical Methods in Engineering (ISSN 0029-5981); 23; 1615-162
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  • 7
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    Buckling of simply supported plate assemblies subject to shear loading (1985)
    In:  Other Sources
    Details
    Publication Date: 2011-08-19
    Description: An analysis is presented of the shear buckling load of an arbitrary simply-supported prismatic plate assembly or stiffened panel configuration. The method utilizes stiffness matrices developed by Wittrick (1968). For the restraint of simple support along edges perpendicular to the longitudinal direction, various wavelengths of response are combined using an energy method that involves only a boundary integral. Numerical results for plate and panel configurations show the accuracy and convergence of the method.
    Keywords: STRUCTURAL MECHANICS
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  • 8
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    Inclusion of elastically connected members in exact buckling and frequency calculations (1986)
    In:  Other Sources
    Details
    Publication Date: 2011-08-19
    Description: A standard stiffness matrix procedure which permits any combination of rigid, elastic, pinned or sliding connections of the degrees of freedom at the ends of a member to the nodes of its parent structure is described, in order to show how easily it can be extended to allow an existing algorithm to be used to ensure that no eigenvalues of the parent structure can be missed even when 'exact' member theory is used. The eigenvalues are the natural frequencies of undamped free vibration analyses or the critical load factors of buckling problems. The method preserves the exactness of the member theory and an efficient method for computer application is indicated. The theory also permits any combination of rigid, elastic, pinned or sliding connections between the freedoms of a substructure and those of its parent structure.
    Keywords: STRUCTURAL MECHANICS
    Type: Computers and Structures (ISSN 0045-7949); 22; 3, 19
    Format: text
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  • 9
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    Adhesive fracture mechanics (1974)
    In:  Other Sources
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    Publication Date: 2011-08-16
    Description: In studies of fracture mechanics the adhesive fracture energy is regarded as a fundamental property of the adhesive system. It is pointed out that the value of the adhesive fracture energy depends on surface preparation, curing conditions, and absorbed monolayers. A test method reported makes use of a disk whose peripheral part is bonded to a substrate material. Pressure is injected into the unbonded central part of the disk. At a certain critical pressure value adhesive failure can be observed. A numerical stress analysis involving arbitrary geometries is conducted.
    Keywords: STRUCTURAL MECHANICS
    Type: International Journal of Fracture; 10; Mar. 197
    Format: text
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  • 10
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    Stress waves in isotropic elastic plate excited by circular transducer (1986)
    In:  Other Sources
    Details
    Publication Date: 2011-08-19
    Description: Steady state harmonic stress waves in an isotropic elastic plate excited on one face by a circular transducer are analyzed theoretically. The transmitting transducer transforms an electrical voltage into a uniform normal stress at the top of the plate. To solve the boundary value problem,the radiation into a half-space is considered. The receiving transducer produces an electrical voltage proportional to the average spatially integrated normal stress over its face due to an incident wave. A numerical procedure is given to evaluate the frequency response at a receiving point due to a multiply reflected wave in the near field. Its stability and convergence are discussed. Parameterization plots which determine the particular wave whose frequency response has maximum magnitude compared with other multiple reflected waves are given for a range of values of dimensionless parameters. The effects of changes in the values of the parameters are discussed.
    Keywords: STRUCTURAL MECHANICS
    Type: Materials Evaluation (ISSN 0025-5327); 44; 455-462
    Format: text
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