Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 11 of 11 for “"Stiffness Change"”.
-
Fatigue response of notched graphite--epoxy laminates
Changes in the stiffness and strength of notched quasi-isotropic graphite-epoxy laminates were recorded and related to the fatigue damage. Two different laminates [0,90,+45,-45]s (type A) and [ +45, 90, -45, 0] s (type B) were considered and the effects of stacking sequence were compared. …
-
Long term behavior of Arall laminates
… and the relationships between damage and stiffness change, remaining strength and life.
-
Study of Condition Monitoring of Bridges Using Genetic Algorithms
… the damage in the element level defined as the stiffness change in structural members; and the location and size of the damage in the detailed level defined as the fracture damage in beam structures are successfully determined.
-
Mathematical modelling of growth factor induced cell migration in 3D engineered matrices
… matrices with spatially uniform and varying stiffness is predicted. The effect of varying growth factor productivity and diffusivity is explored for cell migration on a planar substrate induced by a growth factor only and combined with mechanical cues. The model predicts that the maximum …
-
Dynamic analysis of magnetorheological elastomer configured sandwich structures
… on the dynamic shear properties and behaviour of stiffness change of MRE and MRE cored adaptive sandwich beam structures depending on magnetic fields. Dynamic shear property tests with different curing stages have been enhanced to obtain various properties. The new developed forced vibration test …
-
Shock isolation using switchable stiffness
This study investigates a novel stiffness control strategy applied to the problem of shock isolation. This is based on the principle that the stiffness and mass are the principal physical properties that control the passive system shock response. The problem of shock response control is divided in …
-
Effect of ply drop-offs on the strength of graphite-epoxy laminates
… in strength is directly related to the axial stiffness change between the thick and thin sections of the laminate. The three-dimensional state of stress in the laminate was evaluated by the finite element method. The magnitude of the interlaminar stresses at the ply drop-off for N<sub>d</sub> …
-
Interlaminar stress analysis of dropped-ply laminated plates and shells by a mixed method
… and in-plane shear. A second study found the stiffness change across the ply termination to have a much greater influence on the interlaminar stresses. Correlations between the stiffness ratio of the thick to the thin sections of the laminates and the magnitude of a parameter based on a …
-
Vibration based performance assessment of concrete-concrete composite bridges
… connectors was simulated by reducing the spring stiffness. The updating of the FE model was done manually by adjusting appropriate spring stiffnesses. The experimental and analytical results show that the natural frequencies are sensitive to this damage. The frequencies dropped from undamaged to …
-
Identification of Physical Changes to a Steel Frame
… to determine the feasibility of identifying a change to the mass or stiffness of a steel frame. Physical testing was performed using an accelerometer, linear shaker, and arbitrary function generator. Two methods of laboratory testing were developed: ambient vibration testing (AVT) and forced …
-
Modelling of mechanosensitive morphogenesis and maintenance of cell structure: Application to musculoskeletal cells and tissues
… under load. The density of integrins can change if a cell is placed on a stiff surface, allowing it to spread, while cadherin density fluctuates significantly during cytokinesis. I considered how changes in the density of stretched integrins or cadherins could pattern an initially random …