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  • 1
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    Stress analysis of adhesive bonded stiffener plates and double joints (1975)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: The general problem of adhesive bonded stiffener plates and double joints of dissimilar orthotropic adherends with transverse shear deformations are analyzed. Adhesive layers are assumed to be of an isotropic, elastic and relatively flexible material. It is shown that the stress distributions in the adhesive layers are very much dependent on the bending deformations in adherends. Also, it is found that, in the adhesive layer, maximum transverse normal stress is, in many cases, larger than the longitudinal shear stress and that both occur at the edge of the joint. The general method of solution developed is applied to several practical examples.
    Keywords: STRUCTURAL MECHANICS
    Type: NASA-CR-145742 , IFSM-75-73
    Format: application/pdf
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  • 2
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    Stress analysis of bonded plates and joints (1980)
    In:  Other Sources
    Details
    Publication Date: 2019-06-27
    Description: The paper presents a general numerical method of solution to the transverse normal stress and longitudinal shear stress distributions in the adhesive layers of bonded stiffener plates, double lap joints, and strap joints, all of dissimilar orthotropic adherends. The bending deformations and the transverse shear deformations are included in the analytical model. The present influence of bending deformations of adherends on both the normal and shear stresses in adhesive layers is discussed in detail for practical cases.
    Keywords: STRUCTURAL MECHANICS
    Type: American Society of Civil Engineers; Journal
    Format: text
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  • 3
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    On the effect of orthotropy in a cracked cylindrical shell (1974)
    In:  Other Sources
    Details
    Publication Date: 2019-06-27
    Description: A pressurized cylindrical shell containing a longitudinal crack is considered. It is assumed that the material has a special orthotropy - namely, that the shear modulus of the sheet may be evaluated from the measured Young's moduli and the Poisson's ratios and is not an independent material constant. Two examples, one for a mildly orthotropic (titanium) and the other for a strongly orthotropic (graphite) material approximately satisfying the condition of special orthotropy are given. The results show that the stress intensity factors are rather strongly dependent on the degree of orthotropy.
    Keywords: STRUCTURAL MECHANICS
    Type: International Journal of Fracture; 10; Sept
    Format: text
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  • 4
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    The effect of bending on the stresses in adhesive joints (1975)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: The problem of stress distribution in adhesive joints where two orthotropic plates are bonded through a flexible adhesive layer is analyzed. It is shown that the effect of bending of the adherends on the stresses in the adhesive layer is very significant. The transverse shear deformations of the adherends appear to have little influence on the adhesive layer stresses. The maximum transverse normal stress in the adhesive is shown to be larger than the maximum longitudinal shear stress. The method of solution is applied to several examples of specific joint geometries and material combinations, and is proven to be applicable to other related problems.
    Keywords: STRUCTURAL MECHANICS
    Type: NASA-CR-142902 , IFSM-75-68
    Format: application/pdf
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  • 5
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    A cylindrical shell with an axial crack under skew-symmetric loading. (1973)
    In:  Other Sources
    Details
    Publication Date: 2019-06-27
    Description: The skew-symmetric problem for a cylindrical shell containing an axial crack is considered. It is assumed that the material has a special orthotropy - namely, that the shear modulus may be evaluated from the measured Young's moduli and Poisson ratios and is not an independent material constant. The problem is solved within the confines of an eighth-order linearized shallow shell theory. As numerical examples, the torsion of an isotropic cylinder and that of a specially orthotropic cylinder (titanium) are considered. The membrane and bending components of the stress intensity factor are calculated and are given as functions of a dimensionless shell parameter. In the torsion problem for the axially cracked cylinder the bending effects appear to be much more significant than that found for the circumferentially cracked cylindrical shell. Also, as the shell parameter increases, unlike the results found in the pressurized shell, the bending stresses around crack ends do not change sign.
    Keywords: STRUCTURAL MECHANICS
    Type: International Journal of Solids and Structures; 9; Mar. 197
    Format: text
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