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Showing 1 to 20 of 39 for “"compressive force"”.
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Effect of Compressive Force on Aeroelastic Stability of a Strut-Braced Wing
… at high positive load factors, a large tensile force in the strut leads to a considerable compressive axial force in the inner wing, resulting in a reduced bending stiffness and even buckling of the wing. Studying the influence of this compressive force on the structural response of SBW is thus …
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Optimization-based biomechanical evaluation of isometric exertions on a brake wheel
… model was developed to estimate the levels of compressive force on the L3/L4 spinal joint that existed in subjects during an experiment that simulated the hand brake setting task. We recorded three-dimensional body posture and resultant forces at the hands for analysis by the model. The model …
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Biomechanical Determinants of Altered Knee Joint Loads After 18 Months of Intensive Weight Loss
… hypothesis was that weight loss and quadriceps force would have the strongest, positive associations with each of the knee joint load outcomes (tibiofemoral (TF) compressive force, patellofemoral (PF) compressive force, anteroposterior (AP) shear force, and internal knee abduction moment …
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Design of a re-configurable test stand for a multi degree of freedom compliant robot prototype
… a compliant robot prototype, while measuring the force applied and the displacement of the prototype's end. The prototype is a five degree of freedom, compliant device, which required the design process to preserve these DOF while measuring the force and displacement. To reduce the restriction on …
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The hydraulic bulge forming of tubular components.
… hydrostatic pressure combined with an axial compressive force. Initial investigations involved carrying out an extensive literature survey to determine the components which could be formed and the types of machines which have been used. Subsequent to this, initial tests were carried out using …
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Verificação experimental de vibrações paramétricas em vigas
… resonance of a bar subjected to an axial compressive force P, smaller than the buckling load and to an oscillating torque of the type T = T₀ + T₁1 cos Ω t, , where T₀, T₁ e Ω are independent pameters. The regions of elastodynamic instability are determined experimentally for a bar fixed in …
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Comparison of a Dynamic Ankle Orthosis to a Walking Boot for Preserving Ankle Joint Motion and Reducing Tibial Bone Load and Strain
… Ankle Orthosis (DAO) provided a distractive force that offloaded the ankle and retained sagittal ankle excursion during walking. It remains unclear how tibial loading is affected by a walking boot or the DAO. This thesis presents a feasibility study confirming the offloading effects of the …
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An Experimentally Generated Constitutive Model for Peak Stress (σ_peak) in Compression Samples
… true strain value results in a greater maximum compressive force. The apparent activation energy <em>Q<sub>app</sub></em> was calculated by using the Zener-Hollomon parameter combined with the low stress law. <em>Q<sub>app</sub></em><sub> </sub>was calculated to be 311 kJ mol<sup>-1 …
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The Zsm-39 Zeolite Dodecasil-3c: A New Ferroic Material
… to the domain boundary, invariant. Uniaxial compressive force on a sample cut parallel to $\{$111$\}$ caused the domain boundary planes to switch orientations, indicating that Py-D3C is a ferroelastic material.
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Lorentz force actuator and carbon fiber co-winding design, construction and characterization
… fiber and copper coil for use in linear Lorentz force actuators. A conventionally-wound, plastic-bobbin actuator coil and the new, co-wound coil were then tested to compare their electrical, thermal, and mechanical performance. In a needle-free injection application, the cowound coil demonstrated …
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Three-dimensional (3D) electronics by compressive buckling process
A compressive force from releasing a pre-stretched elastomer substrate such as PDMS, Ecoflex, and Dragon Skin induces a 2D precursor to realize a sophisticated 3D electronic structure of a resistor, capacitor and transistor. Conventional microfabrication methods create 3D electronic components, and …
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Giant vesicles compressed by actin polymerization
… plays a critical role in generating propulsive force to drive many types of cell motility. The discovery of actin based motility of the bacterial pathogen Listeria monocytogenes has lead to clearer understandings of the essential ingredients required for cell motility. The biophysical mechanisms …
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[57]Fe Mossbauer spectroscopy and complementary analysis of tin coated steel.
… and no intermetallics on the base where compressive force has been used to compact the tinplate to a required thickness. By heat treating laboratory produced tin electroplated steel, intermetallics have been formed and identified as FeSn[2] using CEMS. The formation of these …
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Evaluation of behavior and the radial shear strength of a reinforced concrete containment structure
… the behavior and strength of the 1/6-scale reinforced concrete containment model tested at Sandia National Laboratories. The containment model was pressurized to more than three times its design pressure until a tear in the liner terminated the test. Deformation data from the model test was used …
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Investigation of the Time-Dependent Longitudinal Flexural Behavior of the Varina-Enon Bridge
… is a building technology which provides a compressive force to concrete via steel tendons. This combination of steel and concrete allows for the construction of lighter and stiffer structures. Post-tensioned concrete is widely utilized throughout the United States highway system and bridge …
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Influence of Externally Applied Moments and Loads on Knee Kinematics: A Cadaveric Study of Single- and Multi-Axis Loading of the Knee
… and the meniscus. The tests were performed on a force couple testing system (FCTS) with simulated quadriceps (300 N) and hamstrings (180 N) muscle loads along with a joint compressive force (150 N). Similar trends were observed between knee kinematics obtained from this study and results obtained …
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Biomechanical testing of upright range of motion versus overhead supine range of motion
… position. It was also mentioned that the compressive forces due to the active mobilization of the arm will stabilize the MCL deficient elbow'. This study is unique in that the proposal is that supine overhead range of motion will stabilize the MCL deficient elbow because gravity will act …
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Buckling and friction-based linear motion clutch with application to medical devices
… of the tube, this model accurately predicts the compressive force in the filament and when the filament locks-up inside the tube (needle). An alternate method to measure the tube geometry using a flatbed scanner was developed and studied. This method was found to provide excellent accuracy and …
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The growth of fractures in the Earth
Fracture growth under compressive loading is studied using the maximum strain energy release rate criterion by means of both the finite element and the boundary element methods. Although this approach is computationally intensive, it is indispensable for this type of problem because other criteria …
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Towards force-correlated ultrasound volume elastography
… as non-invasive, image-based biomarkers: force-controlled elasticity quantification for the identification of strain hardening; registration and segmentation of B-mode images to measure organ volumes; and force-correlated three-dimensional elasticity maps. In order to allow for the …
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