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 20 of 266 for “"Strain Energy"”.
-
Dynamic cyclic bending, kinetic to strain energy, deceleration systems
Please read the abstract in the section 00front of this document
-
Twist error response of periodic lattices to strain energy distribution
… externally actuating walls that properly constrain the lattice edges. Angular errors of the actuation walls cause the lattice to distort, misaligning components on the lattice panels. Research into the response of a lattice to geometric errors imposed on the lattice edges does not account for …
-
The constrained blister - a nearly constant strain energy release rate test for adhesives
… of the blister test permitting nearly constant strain energy release rate testing of adhesive bonds. The work consisted of three parts; (1) development of the testing technique to evaluate strain energy release rate and to record the time dependent nature of the fracture process, (2) numerical …
-
Strain Energy Density and Thermodynamic Entropy as Prognostic Measures of Crack Initiation in Aluminum
… dissertation explores the cumulative plastic strain energy density and thermodynamic entropy generation up to crack initiation. Plastic strain energy density and thermodynamic entropy generation are evaluated to investigate whether they would be capable of providing a physical basis for …
-
Development of a Strain Energy Storage Mechanism Using Tension Elements to Enhance Golf Club Performance
The development of current golf club designs has followed an evolutionary process starting with the original wooden heads of a hundred years ago, to the thin-walled, hollow body titanium heads of today. Current designs utilize what has become known as the trampoline effect to increase the …
-
Developments in Extended Finite Element Methods for Extraction of Strain Energy Release Rates and Computational Nanomechanics for SWCNT Aggregates
… element (XFEM) framework, is proposed to compute Strain Energy Release Rates (SERRs) directly from Irwin's integral. Crack tip enrichment functions in XFEM allow for evaluation of integral quantities in closed form (for some crack configurations studied) and therefore results in an accurate and …
-
A finite element mesh optimization procedure using a thermal expansion analogy
… temperature field computed from the element strain energy contents. Elements having high strain energy contents are shrunk and those with low strain energy contents are expanded until all elements contain the same amount of strain energy. Deviatoric strain energy is also used in place of the …
-
The development of the peninsula blister fracture test for adhesively bonded joints
… geometry benefits from both a constant strain energy release rate over the major portion of the debond length and a high strain energy release rate at any given pressure. Applications of this technique to several adhesion systems were conducted. Although some of these systems haven't …
-
Regional Mechanical Properties and Microstructure of Ovine Heart Chambers
… biaxial mechanical testing. A Fung-type strain energy function was used to fit the experimental data. Tissue behavior was quantified based on the magnitude of strain energy, as an indicator of tissue stiffness, at equibiaxial strains of 0.10, 0.15, and 0.20. Statistical analysis revealed …
-
Impact Damage Resistance of Shape Memory Alloy Hybrid Composite Structures
The strain energy absorption of shape memory alloy (SMA) bars and beams under tension and bending loading was studied. A theoretical model is presented that can give quantitative relations between the martensite fraction, the applied load, and the strain energy absorbed in the shape memory alloy …
-
Αστοχία ρηγματομένων όλκιμων πλακών με δύο συμμετρικές εγκοπές
… to the plane of the crack. Based on the strain energy density criterion the critical stress for crack growth initiation is determined. The influence of body geometry as it is dictated by notch radius, crack length and distance between crack and notches on the critical stress is studied …
-
On deformations of compressible hyperelastic material
… necessary and sufficient conditions on the strain-energy function for the material to admit such a deformation are obtained. These conditions are examined for several strain-energy functions and in each case complete solutions of the equilibrium equations are obtained. The predictions of the …
-
The mechanics of a hydrogel contact lens on the human eye with a lubricating tear layer
… investigate mobility and stability issues. The strain energy is monitored as the lens is moved across the eye as it would move during a blink of the eye. Mobility is measured both through the total strain energy present in the lens and the strain energy gradient near the equilibrium position of …
-
The role of interfacial structure in the evolution of precipitate morphology
… in a Ni-45wt%Cr alloy were investigated. The strain energy for ledge formation and ledge growth kinetics and the emission of structural defects were studied experimentally during the growth of bcc laths from an fcc matrix. The elastic strain energy of a growth ledge as a function of the ledge …
-
Bench blast modeling: Consequences of crushed zone, wave front shape, and radial cracks.
… cracks. Displacement fields, stress fields, and strain energy density distribution are studied. The analyses show that including radial cracks increases the levels of the strain energy density contours and the magnitudes of the displacement and stress fields several fold. The equivalent cavity …
-
A framework for designing interlayers for ceramic-to-metal joints
… In these equations, the accumulated elastic strain energy in the ceramic has been used as a more reliable metric for quantifying residual stresses and predicting failure stress. The equations provide a useful functional relationship between the strain energy, material properties, and joint …
-
Modeling of ultrasonic processing
… surface, which produces a spatially nonuniform strain energy field within the material. A fraction of this strain energy is dissipated during each ultrasonic loading cycle depending on the temperature- dependent viscoelastic response of the material. This dissipation produces a rapid heating, …
-
Experimental and Numerical Investigations on the Durability and Fracture Mechanics of the Bonded Systems for Microelectronics Application
… interface was measured as a function of applied strain energy release rate, G, and temperature using a wedge test geometry. The specimens consist of two glass plates bonded with a thin layer of proprietary epoxy adhesive. The crack fronts along the epoxy/glass interfaces were measured using an …
-
Biological tissue mechanics with fibres modelled as one dimensional Cosserat continua: applications to cardiac tissue in healthy and diseased states
… tissue mechanics is modelled using anisotropic strain energy functions capturing the averaged behaviour of its fibrous microstructure. The strain energy function can be derived via representation theorems for anisotropic functions where a suitable nonlinear strain tensor, e.g. the Green strain …
Page 1 of 14