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Showing 1 to 20 of 28 for “"Ultimate stress"”.
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Effects of Sex, Strain Rate, and Age on the Compressive and Tensile Material Properties of Human Costal Cartilage
… data were collected and used to calculate stress and strain. For the compression data, the toe region was fit using a second-order polynomial, and the toe transition stress, toe transition strain, second-order polynomial coefficient A, and second-order polynomial coefficient B were …
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Investigation of strain rate sensitivity of polymer matrix composites
… the relationship between strain rate and ultimate stress and lastly to use the experimental data to develop a finite element model. Experimental work performed in support of this model includes material characterization of unidirectional carbon and glass fibre reinforced epoxy at varying …
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The Role of Local Material Properties in Modeling Fracture Tolerance of the Human Thorax
… increase in the average stiffness and average ultimate stress for the cortical bone specimens located in the lateral (11.9 GPa modulus, 153.5 MPa ultimate stress) portion of the ribs versus the anterior (7.51 GPa, 116.7 MPa) and posterior (10.7 GPa, 127.7 MPa) rib locations. The results from …
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Tensile behavior of aluminum reinforced with angle-ply boron epoxy laminates
… laminates was conducted. It is shown that the ultimate stresses of a wide variety of laminate configurations fall within a very narrow range of values. Some configurations of composite reinforced aluminum laminates exhibited higher ultimate stress values than the corresponding all composite …
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Tensile Material Properties of Human Costal Cartilage Perichondrium
… a material testing system. The elastic modulus, ultimate stress, ultimate strain, failure stress, failure strain, and strain energy density (SED) were then calculated for each test. Material property data were compared by sample type and loading rate. Since there was no significant influence of …
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Development of a Biaxial Testing System for Research of Soft Tissue Biomechanics using Laboratory Models
… models to replicate coronary arteries’ ultimate tensile stress (0.2 - 2.08 MPa). To this end, we developed a biomechanical testing system that allows us to characterize the material properties of small samples with high accuracy and precision. We built and validated the performance of …
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Material Properties of Human Rib Cortical Bone from Dynamic Tension Coupon Testing
… of 0.5 strains/sec. The elastic modulus, yield stress, yield strain, ultimate stress, ultimate strain, and strain energy density were determined from the resulting stress versus strain curves. The overall average of all cadaver data gives an elastic modulus of 13.9 GPa, a yield stress of 93.9 …
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Peridynamic Investigation of Stress-Strain Response and Fracture Behavior Variations in Micro-CT Images of Mock Energetic Nanocomposites
The stress-strain response and fracture behaviors of a mock energetic nanocomposite were investigated to reveal behaviors that contribute to variations throughout the sample. Approximately 100 XCT images that span the depth of a single sample were modeled in a peridynamics formulation to …
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Effects of Sex, Strain Rate, and Age on the Tensile and Compressive Material Properties of Human Rib Cortical Bone
… at 0.5 strain/s. The elastic modulus, yield stress, yield strain, ultimate stress, elastic strain energy density (SED), plastic SED, and total SED were then calculated for each tensile and compression test. In addition, failure stress and failure strain were calculated for each tension test. …
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A Methodology for Verification of Structural Standards for a Seating System by Finite Element Analysis
… meets the required safety standards. The largest stresses induced in the system are between the yield stress and ultimate stress of the material, indicating plastic deformation without failure due to fracture.</p>
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Femoral Biomechanical Analyses and 3D Printed Femoral Diaphysis for Biomechanical Simulation
… included elastic modulus, yield strength, ultimate strength, yield strain, and ultimate strain. Compressive parameters included compressive modulus, yield stress, and ultimate stress. Specimen-specific parameters included stiffness, failure load, and bending moment at failure. Computational …
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The effect of mechanical loading on bone during growth
… of the subjects (elastic modulus, yield and ultimate stress and strain, toughness, and resilience). Results from the longitudinal rat study indicate that the structural and material properties of the rat tibial diaphysis are organized to best accommodate bending loads. In addition, the …
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Siloxane-Based Reinforcement of Polysiloxanes: from Supramolecular Interactions to Nanoparticles
… content, demonstrating a 3-fold increase in ultimate stress at 50 wt% MQ copolymer nanoparticle incorporation. VP AM of the 40 wt% MQ-loaded, photo-active PDMS formulation demonstrates facile amenability of photo-active PDMS formulations with high MQ-loading content to 3D printing processes …
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Influence of the Interphase on the Mechanical Properties of Nylon 66 Composites
… the adhesion and properties such as damping, ultimate stress and strain, and modulus of the composite. This was accomplished using a modified fiber pull-out test on single filament composites, and dynamic mechanical analysis, vibrational adhesion testing, and uni-axial tension testing on bulk …
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Bond and Material Properties of Grade 270 and Grade 300 Prestressing Strands
… properties of grade 270 and grade 300 prestressing strand of various sizes. Tension tests were performed on each type of strand. The data from these tests was used to determine modulus of elasticity, yield stress, ultimate stress, and ultimate elongation for each strand. The yield stresses …
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Performance of confined concrete columns under simulated life cycles
… of confinement and ductility. The development of stress-strain models for FRP confined concrete began with the adaptation of steel confinement models then progressed to models specifically developed based on test results from FRP confined specimens. State of the art stress-strain models for FRP …
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A MULTISCALE APPROACH TO STEM CELL-BASED CHONDROGENESIS FOR CARTILAGE REPAIR
… selectively seeded cells in larger channels. The ultimate stress and modulus of elasticity of constructs with cells seeded in smaller channels increased by as much as four folds. Furthermore, we extended the 2-dimensional finding and successfully created 3-dimensional large scale constructs (3.5 …
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Evaluation of Graft Pretension Effects in Anterior Cruciate Ligament Reconstruction: A Series of In Vitro and In Vivo Experiments
… affected failure mode, tangent modulus, and ultimate stress of the tendons, and hence are important considerations in the mechanical evaluation of porcine PT. Fourth, ACL reconstructions were performed using pretensions of 10 or 20 N in an in vivo porcine model with a specially designed load …
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Characterization of tensile and hardness properties and microstructure of 3D printed bronze metal clay
… 3D printed clay and molded clay. Using measured stress-strain curves and derived mechanical properties, including Young's modulus, yield strength, and ultimate tensile strength, the two formats demonstrate inherit differences. The Ultimate tensile strength for molded BMC and 3D-printed specimens …
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Synthetic Design of Multiphase Systems for Advanced Polymeric Materials
… backbone and resulted in over 200% increased ultimate strain and 50% increased ultimate stress relative to a control that was subjected to a neutral extraction. Lastly, thermoresponsive micellar ligands were synthesized as a multiphase approach to environmental remediation of …
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