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 113 for “"three-point bending"”.
-
Automation of Orthodontic Wire Tester for Performing Three Point Bending Tests
… treatment. An accurate method to study the threedimensional (3D) force systems and the resulting movements of teeth during orthodontic treatment is needed along with the understanding of the material properties of any orthodontic wire. Until recently, most of the orthodontic biomechanics …
-
Preliminary Investigation of the Mechanical Properties of Costal Cartilage and Costochondral Junction in Three-Point Bending
… costochondral junction when loaded to failure in three-point bending. Thirty (n=30) total samples were harvested from nineteen (n=19) donors from ages 21 to 98 years (9 Male, 10 Female). 3rd, 4th, 5th, and 6th ribs and costal cartilage were harvested and isolated into CC only and Rib + CC groups …
-
Ultimate Strength Prediction in Fiberglass/Epoxy Beams Subjected to Three-Point Bending Using Acoustic Emission and Neural Networks
… strengths in composite beams subjected to 3-point bending using a neural network analysis of acoustic emission (AE) amplitude distribution data. Fifteen unidirectional fiberglass/epoxy beams were loaded to failure in a 3-point bend test fixture in an MTS load frame. Acoustic emission data …
-
Investigation of ultrastructural and mechanical properties of rat cortical bone using micro-CT, three-point bending testing, and the reference point indentation technique
… bone as a function of age were assessed with three-point bending testing. Additionally, a novel microindentation technique, termed reference point indentation (RPI),that is capable of in vivo testing was used to assess the mechanical properties of rat bone. These results were compared to …
-
Comparison of Shear Modulus Test Methods
This research compared the results of three tests: ASTM D 198 torsion, ASTM D 198 three-point bending and the five-point bending test (FPBT) using machine-stress-rated (MSR) lumber and laminated veneer lumber (LVL) to determine if the shear properties evaluated by the different test methods were …
-
A coupled theory for diffusion of hydrogen and large elastic-plastic deformations of metals
… of plane-strain tensile deformation and three-point bending of U-Notched specimens. Our simulations on the effects of hydrogen on three-point bending of U-notched specimens are shown to be in good qualitative agreement with published experiments.
-
Study of the mechanical and metallurgical properties of AMDRY 9954 HVOF coated Ti-6A1-4V alloy
… alloy are examined. The mechanical tests include three point bending, tensile, fatigue, indentation, and microhardness tests. The mechanical tests are applied on Ti-6A1-4V specimens (a) asreceived, (b) as-received heat treated, (c) coated then heat treated and (d) coated without heat treatment. …
-
The influence of time-dependent material behavior on the response of sandwich beams
… potential energy, the elastic response of three-layer and five-layer symmetric sandwich beams to mechanical and thermally-induced loads is studied. The sensitivity of the three-layer and five-layer sandwich beams to reductions of the material properties is studied. Using the correspondence …
-
Nitinol-reinforced shape-memory polymers
… has a ten fold increase in actuation force under three-point bending when reinforced with two 0.02 inch diameter nitinol wires. A constitutive model for shape-memory polymers and nitinol has been used to predict with good correlation the actuation-versus-time and displacement-versustime behavior …
-
Mechanical and metallurgical properties of two-layered diamalloy 4010 and 2002 HVOF coating
… the coatings were examined through tensile and three-point bending tests. It was found that the coating produced for Diamalloy 2002 resulted in higher hardness than that corresponding to Diamalloy 4010. The failure mechanism of coating during tensile and three-point bending tests was mainly …
-
Novel techniques for fracture monitoring in crystalline rock
… and under two different loading conditions, three-point and four-point bending. Digital Image Correlation (DIC) was used to identify and calculate the dimensions of the fracture process zone. The study of fracture and fracture processes in granitic specimens through DIC is challenging due to …
-
Scale Modeling of Tests with Combined Thermo-Structural Loading
… exposure tests on gypsum wallboard samples at three scales (full-scale, 1/2-scale, and 1/6-scale). Next, these scaling laws were demonstrated for wood with combined thermo-structural loading. Dimensional lumber boards at ½-scale and ¼-scale were subjected to combined bending and thermal …
-
Age and Gender Effects on Strain Response and Biomechanical Performance of C57BL/6 Mice
… In this study, C57Bl/6 mice were divided into three age groups: 6 months old, 12 months old and 22 months old. Each age group consisted of 6-7 males and 6-7 female mice. Axial compression tests, three-point bending tests and micro-CT were used to assess age related changes in femurs, tibiae and …
-
Finite element modelling of fatigue crack growth in multi-layered architectures
… growth in flat strip specimens subjected to three-point bending tests experiencing severe yielding and path deflections. This study was based on Crack Tip Opening Displacement estimates, the maximum tangential strain criterion and automatic step by step extensions to account for crack growth. …
-
A Biomimic Self-healing Shape Memory Polymer Based Syntactic Foam for Smart Structural Composites
… in humans. A new methodology to fabricate three-dimensional (3-D) fiber reinforced shape memory polymer syntactic foam for structural applications was developed. The effect of impact energy on the ability for the 3-D fiber reinforced PSMP syntactic foam (PSMP-SF) panels to seal cracks and …
-
Laboratory evaluation of cracking in asphalt concrete
… pavement infrastructure. Asphalt concrete is a three phase, heterogeneous composite consisting of aggregate, mastic, and air voids. Crack initiation, crack path and propagation are not well understood in asphalt concrete. This thesis work presents testing and analysis of cracking in …
-
Characterisation of anode supported microtubular SOFC process on pure methane reduction and operation
… hydrogen. To measure mechanical strength, the three point bending test was employed. Temperature programmed oxidation (TPO) results were investigated to measure the carbon deposition on the anode in order to assess potential damage to the cermet catalyst. Also field emission scanning electron …
-
Sahraei failure criteria for detection of short circuit in lithium-ion batteries
… cell behavior under axial, lateral, and three-point bending loads. Unlike previous models that addressed one or two loading conditions, this model incorporates uncoupled axial and lateral property calibrations and employs anisotropic crushable foam modeling for enhanced accuracy. The …
-
The Skeletal Biology of Hibernating Woodchucks (<i>Marmota monax</i>)
… conjunction with computed tomography scans and three-point bending tests to determine bone density, geometry, and mechanical properties of the long bones throughout the year. In addition, serum protein expression was examined to ascertain bone resorption and formation processes indicative of …
-
Mechanics of 3D Composites
… of the thesis a novel 3D composite consisting of three mutually perpendicular orthogonal tows is studied under compression, indentation and three-point bending. Under compression along low fibre volume fraction direction (Z), the 3D composite forms stable and multiple kinks in the Z tows resulting …
Page 1 of 6