Academic literature on the topic 'Stresses - structural'

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Journal articles on the topic "Stresses - structural"

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Sadat, Umar, Zhongzhao Teng, and Jonathan H. Gillard. "Biomechanical structural stresses of atherosclerotic plaques." Expert Review of Cardiovascular Therapy 8, no. 10 (October 2010): 1469–81. http://dx.doi.org/10.1586/erc.10.130.

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Budz, S. F., B. D. Drobenko, and V. I. Astashkin. "Residual Structural Stresses in Glass Bodies." Materials Science 50, no. 3 (November 2014): 406–11. http://dx.doi.org/10.1007/s11003-014-9733-4.

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Silva, Tiago A. N., and Maria A. R. Loja. "An Educational Platform in Structural Mechanics." International Journal of Online and Biomedical Engineering (iJOE) 9, S8 (December 4, 2013): 10. http://dx.doi.org/10.3991/ijoe.v9is8.3319.

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Thermal residual stresses often arise due to a manufacturing process, involving localised thermal induction, or to the existence of structural components with different thermal expansion coefficients. The existence of thermal residual stresses within a structural member is usually undesired, as it decreases the mechanical resistance of structures. Hence, it is desirable to obtain both a minimum level of residual stresses and smoother stresses transitions in the materials interfaces. Regarding the mitigation of thermal residual stress concentration, the use of materials which properties can vary along the component directions has great interest. This work addresses the use of dual-phase functionally graded materials, which microstructure varies gradually from a material to another according to a given gradation function. On the order hand, it is also addressed the use of a population based optimization algorithm in order to attain the referred minimum stress level. Summarizing, the current work presents an educational platform directed to structural mechanics students, which aims to give the tools to understand both the influence of design parameters in the thermal residual stress level and distribution along the material and the advantages of using a structural optimization technique in order to minimize the drawback thermal residual stresses effects.
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Fuentes, David, Marcos Salas, Gonzalo Tampier, and Claudio Troncoso. "Structural Analysis of an Aluminum Multihull." Ciencia y tecnología de buques 8, no. 17 (July 8, 2015): 87. http://dx.doi.org/10.25043/19098642.123.

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Structural analysis of a multihull is relatively complex since the connecting structure introduces additional stress than those typical of a monohull. The aluminum trimaran presented in this work was designed within the framework of the research project “Conceptual Design of a High-performance Vessel for Passenger Transport in Chile’s Austral Zone”. The trimaran was structurally measured using the regulations of classification societies Germanischer Lloyd, Det Norske Veritas y LloydÅLs Register. For the scantlings obtained with each regulation a Finite Element Model was created and the structural analysis for the slamming and splitting moment events was made. The results were analyzed and the stress concentration zones were determined to compare them with admissible stresses and conclude whether the structural sizing adequately and safely responds to the design stresses.
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Kozyuk, A. G., and G. I. Starostin. "Residual structural stresses in reinforced shells of rotation." Journal of Applied Mechanics and Technical Physics 31, no. 3 (1991): 488–93. http://dx.doi.org/10.1007/bf00864587.

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Ershov, L. V., and L. N. Germanovich. "Temperature field and structural stresses in heterogeneous rocks." Soviet Mining Science 21, no. 2 (March 1985): 122–32. http://dx.doi.org/10.1007/bf02499615.

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Sánchez-Beitia, Santiago, and Javier Barrallo. "Applicability of X-Ray Diffraction Technique for Stresses Quantification in Metallic Structural Elements." Advanced Materials Research 133-134 (October 2010): 211–16. http://dx.doi.org/10.4028/www.scientific.net/amr.133-134.211.

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Since 2009 the research group managed by the authors promotes the applicability of X-Ray Diffraction technique (NDT) for global stresses measurements in metallic structures for civil engineering and building. There exists standard portable equipments in the market for different applications of those here shown (residual stresses measurements). This paper shows some tests prior the complete calibration for any situation in such a way that can be applied to the quantification of stresses in service. Until now a metallic bar at the Oporto Cathedral, two corrugate bars at laboratory and a small metallic structure at laboratory have been tested. This last experimental work is here shown. The stresses obtained are the sum of the residual stresses and the external applied stresses. Currently the group works in order to remove the effect of the residual stresses by means of tests on small metallic structures specifically built.
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Florentin, E., L. Gallimard, P. Ladevèze, and J. P. Pelle. "Local error estimator for stresses in 3D structural analysis." Computers & Structures 81, no. 18-19 (August 2003): 1751–57. http://dx.doi.org/10.1016/s0045-7949(03)00199-8.

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Czinkota, Sid. "Structural analysis of pipeline stresses created by line lowering." Canadian Journal of Civil Engineering 14, no. 6 (December 1, 1987): 719–27. http://dx.doi.org/10.1139/l87-109.

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To increase the depth of soil which covers a buried steel pipeline, the line can be lowered without cutting and welding. The degree of curvature in the new profile is the critical factor for controlling the resultant strains. Presented are two methods of calculating the required profile for a line containing high-pressure natural gas. One of the two is selected as being more efficient than the other and is compared with other known methods. Finally, a case history using the new method is presented. Key words: pipelines, gas pipelines, structural analysis, stress analysis, axial stress, axial strain, deflection, curvature, profiles.
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Gardner, L., and R. B. Cruise. "Modeling of Residual Stresses in Structural Stainless Steel Sections." Journal of Structural Engineering 135, no. 1 (January 2009): 42–53. http://dx.doi.org/10.1061/(asce)0733-9445(2009)135:1(42).

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Dissertations / Theses on the topic "Stresses - structural"

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Harrington, Joshua S. "Measurement of structural stresses using hole drilling." Thesis, University of British Columbia, 2015. http://hdl.handle.net/2429/55049.

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From a measurement standpoint structural stresses can be divided into two broad categories: stresses that can be measured straightforwardly by adjusting loads, e.g., live loads on a bridge, and those that are much more difficult, e.g., gravitational loads and loads due to static indeterminacy. This research focuses on the development of a method that combines the hole-drilling technique, a method used to measure residual stresses, and digital image correlation (DIC), an optical method for determining displacements, to measure these difficult-to-measure structural stresses. The hole-drilling technique works by relating local displacements caused by the removal of a small amount of stressed material to the material stresses. Adapting the hole-drilling technique to measure structural stresses requires scaling the hole size and modifying the calculation approach to measure deeper into a material. DIC is a robust means to measure full-field displacements and unlike other methods used to measure hole-drilling displacements, can easily be scaled to different hole sizes and corrected for measurement artifacts. There are three primary areas of investigation: the modification of the calculation method to account for the finite thickness of structural members, understanding the capabilities and limitations of DIC for measuring hole-drilling displacements, and evaluating the effects hole cutting has on the measurement. Experimental measurements are made to validate the measurement method as well as apply it to the real world problem of measuring thermally induced stresses in railroad tracks.
Applied Science, Faculty of
Mechanical Engineering, Department of
Graduate
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Mehrkar-Asl, S. "Direct measurement of stresses in concrete structures." Thesis, University of Surrey, 1988. http://epubs.surrey.ac.uk/804391/.

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Meduoye, G. O. "Investigation into the stresses and strains in toothed belt under static loading." Thesis, Cardiff University, 1985. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.354746.

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Govender, Nishalin. "A parametric investigation into the membrane stresses of hydrostatically loaded circular and elliptic toroidal shells." Master's thesis, University of Cape Town, 2017. http://hdl.handle.net/11427/25284.

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This study explores the membrane stresses of hydrostatically loaded elliptical and circular toroidal tanks. Equations are derived, using the membrane theory of shells, to obtain equations which can accurately describe the meridional and hoop stress behaviour at locations sufficiently far away from any bending disturbance occurring within the shell. The derived expressions are validated using the finite element software ADINA, indicating excellent agreement between the analytical and numerical solutions. A parametric study is undertaken, whereby the membrane profiles for prolate, oblate and circular toroidal shells is investigated. Parameters which are varied are the opening and aspect ratio of toroidal shells. Stress resultant profiles are shown for numerous cases in order to aid designers on suitable ratios to minimise membrane stresses for use when designing hydrostatically loaded toroidal shells. Lastly, numerical examples are investigated, keeping the volume constant and comparing the surface area due to a variation of opening and aspect ratios. It was found that when investigating toroidal shells, considerations are required when choosing the aspect ratio and opening ratios. Based on the results obtained, compromises between prolate and circular cross-sections with relatively small opening ratios are recommended in order to minimise the cost and maximise the structural efficiency, based on the membrane stresses occurring within the shell.
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Zheng, Tieyu. "A study of residual stresses in thin anisotropic (silicon) plates." Diss., Georgia Institute of Technology, 2000. http://hdl.handle.net/1853/17516.

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Dong, Hai. "Nano-scale structural characterization of polymers subjected to stresses and thermal variations." Diss., Georgia Institute of Technology, 2003. http://hdl.handle.net/1853/8515.

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Bavirisetty, Rambabu 1963. "COMPARISON OF STRESS RECOVERY ALGORITHMS." Thesis, The University of Arizona, 1987. http://hdl.handle.net/10150/276405.

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Chaudry, Zaffir Ahmed. "Enhanced induced strain actuator performance through discrete attachment to structural elements." Diss., This resource online, 1992. http://scholar.lib.vt.edu/theses/available/etd-06062008-171749/.

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Warren, Alexander V. R. "Empirical shear assessment of reinforced concrete bridge members." Thesis, Available from the University of Aberdeen Library and Historic Collections Digital Resources, 2008. http://digitool.abdn.ac.uk:80/webclient/DeliveryManager?application=DIGITOOL-3&owner=resourcediscovery&custom_att_2=simple_viewer&pid=25876.

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Ahern, Alexandra Anne. "Lineations and Structural Mapping of Io's Paterae and Mountains: Implications for Internal Stresses." BYU ScholarsArchive, 2016. https://scholarsarchive.byu.edu/etd/6201.

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Io, the most volcanically active body in the solar system, also has some of the tallest and steepest mountains. The mountains seem to be tectonic in origin, yet the methods of their formation have not been decisively constrained and their associations with volcanic paterae are yet unclear. We have compiled global spatial statistics on mountain dimensions and orientations, lineations attributed to structures, straight patera margins, and patera dimensions in order to better define their genetic relationships and the mechanisms forming each type of feature. Additionally, we have produced 4 regional structural maps of mountain complexes and have proposed tectonic histories. Global statistics show that paterae and mountains and their associated lineations are more common at low latitudes and that lineations attributed to tectonics have preferred azimuths of 45° and 135°, whereas straight patera margins and azimuths appear more random. Additionally, tectonic lineations tend to cluster to those of similar types and are smaller when closer together. Mountains in general on Io are isolated, varied in size and shape, and have no significant geographic patterns in those variations. These results may indicate that global-scale processes are involved in forming Io's tectonic structures, but that the diversity of mountain characteristics and the collapse of paterae adjacent to mountain complexes may be more regionally controlled. Mapping of the Hi'iaka, Shamshu, Tohil, and Zal regions has shown that Io's mountains reside in large, faulted-bounded crustal blocks, which have undergone modification through local responses of subsurface structures. Strike-slip motion along reactivated faults has led to the formation of both transpressional and transtensional features, creating tall peaks and low basins, some of which are now occupied by paterae. Subsurface structures play a large role in Io's mountain diversity. Based on interpretation of statistical results and on our localized mapping, we propose that Io's mountains result from a combination of crustal stresses involving both global and local-scale processes. Multiple faults and fractures in a variety of orientations formed in Io's lithosphere, created over billions of years by stresses imposed by volcanic loading and tidal flexing. These faults have been progressively buried over time under multiple layers of volcanic material. Stresses continuing from loading and tidal massaging sometimes occur at oblique angles to pre-existing faults, reactivating them as reverse, normal, or strike-slip faults. Because of this, large, cohesive fault-bounded blocks have undergone both transpressional and transtensional modification. Further degradation of mountains has also occurred from extensive mass wasting, gravitational collapse, and erosion by sublimation and sapping of sulfur-rich layers within the crust. This model of fault-bounded blocks being modified by continual stresses and local structural response accounts for the variation and patterns of mountain sizes, shapes, and orientations, along with their isolation and interactions with other features. It presents an explanation for the influence of global and regional tectonics and a more detailed account of the formation of some of Io's remarkable mountains.
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Books on the topic "Stresses - structural"

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Thompson, Randolph C. Thermal-structural panel buckling tests. Edwards, Calif: National Aeronautics and Space Administration, Ames Research Center, Dryden Flight Research Facility, 1991.

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Thompson, Randolph C. Thermal-structural panel buckling tests. Edwards, Calif: National Aeronautics and Space Administration, Ames Research Center, Dryden Flight Research Facility, 1991.

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Wolfgang, Kauschke, ed. Structural bearings. Berlin: Ernst & Sohn, 2002.

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Norman, Jones. Structural impact. 2nd ed. Cambridge: Cambridge University Press, 2012.

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Megson, T. H. G. Structural and stress analysis. Oxford: Butterworth-Heinemann, 2000.

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Structural and stress analysis. 2nd ed. Boston, Mass: Elsevier Butterworth Heineman, 2005.

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Structural analysis: Using classical and matrix methods. 4th ed. Hoboken, NJ: John Wiley, 2007.

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McCormac, Jack C. Structural analysis: A classical and matrix approach. 2nd ed. Reading, Mass: Addison Wesley, 1997.

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McCormac, Jack C. Structural analysis: A classical and matrix approach. New York: Harper & Row, 1988.

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Freed, Alan David. Steady-state and transient zener parameters in viscoplasticity: Drag strength versus yield strength. [Washington, DC]: National Aeronautics and Space Administration, 1990.

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Book chapters on the topic "Stresses - structural"

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Cain, Jack, and Ray Hulse. "Stress Analysis (Direct Stresses)." In Structural Mechanics, 137–62. London: Macmillan Education UK, 1990. http://dx.doi.org/10.1007/978-1-349-10542-7_5.

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Cain, Jack, and Ray Hulse. "Bending Stresses." In Structural Mechanics, 163–96. London: Macmillan Education UK, 1990. http://dx.doi.org/10.1007/978-1-349-10542-7_6.

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Cain, Jack, and Ray Hulse. "Shear Stresses." In Structural Mechanics, 225–57. London: Macmillan Education UK, 1990. http://dx.doi.org/10.1007/978-1-349-10542-7_8.

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Cain, Jack, and Ray Hulse. "Torsional Stresses." In Structural Mechanics, 259–86. London: Macmillan Education UK, 1990. http://dx.doi.org/10.1007/978-1-349-10542-7_9.

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Strømmen, Einar N. "Stresses in Composite Beams." In Structural Mechanics, 149–56. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-44318-4_7.

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Cueto, Elías, and David González. "Beams (II). Normal Stresses." In Structural Integrity, 127–46. Cham: Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-72935-0_6.

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Cueto, Elías, and David González. "Beams (III). Shear Stresses." In Structural Integrity, 147–67. Cham: Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-72935-0_7.

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Cain, Jack, and Ray Hulse. "Combined Bending and Direct Stresses." In Structural Mechanics, 197–223. London: Macmillan Education UK, 1990. http://dx.doi.org/10.1007/978-1-349-10542-7_7.

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Bayly, Brian. "Forces and Stresses." In Mechanics in Structural Geology, 51–88. New York, NY: Springer US, 1992. http://dx.doi.org/10.1007/978-1-4613-9166-1_3.

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Bauchau, O. A., and J. I. Craig. "Introduction to plasticity and thermal stresses." In Structural Analysis, 721–62. Dordrecht: Springer Netherlands, 2009. http://dx.doi.org/10.1007/978-90-481-2516-6_13.

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Conference papers on the topic "Stresses - structural"

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"Structural Engineering Studies on Reinforced Concrete Structure using Neutron Diffraction." In Residual Stresses 10. Materials Research Forum LLC, 2016. http://dx.doi.org/10.21741/9781945291173-5.

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HUSSEIN, R., and P. FAZIO. "Thermal stresses in sandwich plates." In 26th Structures, Structural Dynamics, and Materials Conference. Reston, Virigina: American Institute of Aeronautics and Astronautics, 1985. http://dx.doi.org/10.2514/6.1985-828.

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"Structural Characterization of Ancient Japanese Swords from MAAS Using Neutron Strain Scanning Measurements." In Residual Stresses 10. Materials Research Forum LLC, 2016. http://dx.doi.org/10.21741/9781945291173-75.

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BENCHEKCHOU, B., and R. WHITE. "STRESSES AROUND FASTENERS IN COMPOSITE MATERIALS." In 34th Structures, Structural Dynamics and Materials Conference. Reston, Virigina: American Institute of Aeronautics and Astronautics, 1993. http://dx.doi.org/10.2514/6.1993-1347.

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McVeigh, P., and T. Farris. "Analysis of surface stresses and stress intensity factors present during fretting fatigue." In 40th Structures, Structural Dynamics, and Materials Conference and Exhibit. Reston, Virigina: American Institute of Aeronautics and Astronautics, 1999. http://dx.doi.org/10.2514/6.1999-1337.

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RAI, H., E. LEE, and C. ROGERS. "Cure-induced residual stresses in thick composite laminates." In 32nd Structures, Structural Dynamics, and Materials Conference. Reston, Virigina: American Institute of Aeronautics and Astronautics, 1991. http://dx.doi.org/10.2514/6.1991-1043.

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HYER, M., D. COOPER, and S. TOMPKINS. "Thermally induced stresses in cross-ply composite tubes." In 27th Structures, Structural Dynamics and Materials Conference. Reston, Virigina: American Institute of Aeronautics and Astronautics, 1986. http://dx.doi.org/10.2514/6.1986-968.

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ZHOU, MING, and HAROLD THOMAS. "AN ALTERNATIVE APPROXIMATION FOR STRESSES IN PLATE STRUCTURES." In 34th Structures, Structural Dynamics and Materials Conference. Reston, Virigina: American Institute of Aeronautics and Astronautics, 1993. http://dx.doi.org/10.2514/6.1993-1353.

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COHEN, D., and M. HYER. "Influence of geometric nonlinearities on skin-stiffener interface stresses." In 29th Structures, Structural Dynamics and Materials Conference. Reston, Virigina: American Institute of Aeronautics and Astronautics, 1988. http://dx.doi.org/10.2514/6.1988-2217.

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TENNYSON, R. "Approximations for calculating compressive buckling stresses for cylindrical panels." In 27th Structures, Structural Dynamics and Materials Conference. Reston, Virigina: American Institute of Aeronautics and Astronautics, 1986. http://dx.doi.org/10.2514/6.1986-938.

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Reports on the topic "Stresses - structural"

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Thornell, Travis, Charles Weiss, Sarah Williams, Jennifer Jefcoat, Zackery McClelland, Todd Rushing, and Robert Moser. Magnetorheological composite materials (MRCMs) for instant and adaptable structural control. Engineer Research and Development Center (U.S.), November 2020. http://dx.doi.org/10.21079/11681/38721.

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Magnetic responsive materials can be used in a variety of applications. For structural applications, the ability to create tunable moduli from relatively soft materials with applied electromagnetic stimuli can be advantageous for light-weight protection. This study investigated magnetorheological composite materials involving carbonyl iron particles (CIP) embedded into two different systems. The first material system was a model cementitious system of CIP and kaolinite clay dispersed in mineral oil. The magnetorheological behaviors were investigated by using parallel plates with an attached magnetic accessory to evaluate deformations up to 1 T. The yield stress of these slurries was measured by using rotational and oscillatory experiments and was found to be controllable based on CIP loading and magnetic field strength with yield stresses ranging from 10 to 104 Pa. The second material system utilized a polystyrene-butadiene rubber solvent-cast films with CIP embedded. The flexible matrix can stiffen and become rigid when an external field is applied. For CIP loadings of 8% and 17% vol %, the storage modulus response for each loading stiffened by 22% and 74%, respectively.
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Dawson, Paul R. A New Approach for Investigating Crystal Stresses that Drive the Initiation of Fatigue-Induced Defects in Structural Alloys. Fort Belvoir, VA: Defense Technical Information Center, December 2008. http://dx.doi.org/10.21236/ada500764.

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Heymsfield, Ernie, and Jeb Tingle. State of the practice in pavement structural design/analysis codes relevant to airfield pavement design. Engineer Research and Development Center (U.S.), May 2021. http://dx.doi.org/10.21079/11681/40542.

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An airfield pavement structure is designed to support aircraft live loads for a specified pavement design life. Computer codes are available to assist the engineer in designing an airfield pavement structure. Pavement structural design is generally a function of five criteria: the pavement structural configuration, materials, the applied loading, ambient conditions, and how pavement failure is defined. The two typical types of pavement structures, rigid and flexible, provide load support in fundamentally different ways and develop different stress distributions at the pavement – base interface. Airfield pavement structural design is unique due to the large concentrated dynamic loads that a pavement structure endures to support aircraft movements. Aircraft live loads that accompany aircraft movements are characterized in terms of the load magnitude, load area (tire-pavement contact surface), aircraft speed, movement frequency, landing gear configuration, and wheel coverage. The typical methods used for pavement structural design can be categorized into three approaches: empirical methods, analytical (closed-form) solutions, and numerical (finite element analysis) approaches. This article examines computational approaches used for airfield pavement structural design to summarize the state-of-the-practice and to identify opportunities for future advancements. United States and non-U.S. airfield pavement structural codes are reviewed in this article considering their computational methodology and intrinsic qualities.
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Riveros, Guillermo, Felipe Acosta, Reena Patel, and Wayne Hodo. Computational mechanics of the paddlefish rostrum. Engineer Research and Development Center (U.S.), September 2021. http://dx.doi.org/10.21079/11681/41860.

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Purpose – The rostrum of a paddlefish provides hydrodynamic stability during feeding process in addition to detect the food using receptors that are randomly distributed in the rostrum. The exterior tissue of the rostrum covers the cartilage that surrounds the bones forming interlocking star shaped bones. Design/methodology/approach – The aim of this work is to assess the mechanical behavior of four finite element models varying the type of formulation as follows: linear-reduced integration, linear-full integration, quadratic-reduced integration and quadratic-full integration. Also presented is the load transfer mechanisms of the bone structure of the rostrum. Findings – Conclusions are based on comparison among the four models. There is no significant difference between integration orders for similar type of elements. Quadratic-reduced integration formulation resulted in lower structural stiffness compared with linear formulation as seen by higher displacements and stresses than using linearly formulated elements. It is concluded that second-order elements with reduced integration and can model accurately stress concentrations and distributions without over stiffening their general response. Originality/value – The use of advanced computational mechanics techniques to analyze the complex geometry and components of the paddlefish rostrum provides a viable avenue to gain fundamental understanding of the proper finite element formulation needed to successfully obtain the system behavior and hot spot locations.
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Kaneko, Tsuneaki, Akifumi Okabe, and Noboru Tomioka. A Method of Calculating Nominal Structural Stress for Spot-Welded Structures. Warrendale, PA: SAE International, September 2005. http://dx.doi.org/10.4271/2005-08-0516.

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Morphett, Jane, Alexandra Whittaker, Amy Reichelt, and Mark Hutchinson. Perineuronal net structure as a non-cellular mechanism of affective state, a scoping review. INPLASY - International Platform of Registered Systematic Review and Meta-analysis Protocols, August 2021. http://dx.doi.org/10.37766/inplasy2021.8.0075.

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Is the perineuronal net structure within emotional processing brain regions associated with changes in affective state? The objective of this scoping review is to bring together the literature on human and animal studies which have measured perineuronal net structure in brain regions associated with emotional processing (such as but not limited to amygdala, hippocampus and prefrontal cortex). Perineuronal nets are a specialised form of condensed extracellular matrix that enwrap and protect neurons (Suttkus et al., 2016), regulate synaptic plasticity (Celio and Blumcke, 1994) and ion homeostasis (Morawski et al., 2015). Perineuronal nets are dynamic structures that are influenced by external and internal environmental shifts – for example, increasing in intensity and number in response to stressors (Blanco and Conant, 2021) and pharmacological agents (Riga et al., 2017). This review’s objective is to generate a compilation of existing knowledge regarding the structural changes of perineuronal nets in experimental studies that manipulate affective state, including those that alter environmental stressors. The outcomes will inform future research directions by elucidating non-cellular central nervous system mechanisms that underpin positive and negative emotional states. These methods may also be targets for manipulation to manage conditions of depression or promote wellbeing. Population: human and animal Condition: affective state as determined through validated behavioural assessment methods or established biomarkers. This includes both positive and negative affective states. Context: PNN structure, measuringPNNs.
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Herget, G. 1990 Conference on Stresses in Underground Structures. Natural Resources Canada/CMSS/Information Management, 1991. http://dx.doi.org/10.4095/328795.

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Patel, Reena. Complex network analysis for early detection of failure mechanisms in resilient bio-structures. Engineer Research and Development Center (U.S.), June 2021. http://dx.doi.org/10.21079/11681/41042.

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Bio-structures owe their remarkable mechanical properties to their hierarchical geometrical arrangement as well as heterogeneous material properties. This dissertation presents an integrated, interdisciplinary approach that employs computational mechanics combined with flow network analysis to gain fundamental insights into the failure mechanisms of high performance, light-weight, structured composites by examining the stress flow patterns formed in the nascent stages of loading for the rostrum of the paddlefish. The data required for the flow network analysis was generated from the finite element analysis of the rostrum. The flow network was weighted based on the parameter of interest, which is stress in the current study. The changing kinematics of the structural system was provided as input to the algorithm that computes the minimum-cut of the flow network. The proposed approach was verified using two classical problems three- and four-point bending of a simply-supported concrete beam. The current study also addresses the methodology used to prepare data in an appropriate format for a seamless transition from finite element binary database files to the abstract mathematical domain needed for the network flow analysis. A robust, platform-independent procedure was developed that efficiently handles the large datasets produced by the finite element simulations. Results from computational mechanics using Abaqus and complex network analysis are presented.
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Karkkainen, Ryan, and Bhavani Sankar. A Stress Gradient Failure Theory for Textile Structural Composites. Fort Belvoir, VA: Defense Technical Information Center, May 2006. http://dx.doi.org/10.21236/ada455158.

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Dapino, Marcelo J., Ralph C. Smith, LeAnn E. Faidley, and Alison B. Flatau. A Coupled Structural-Magnetic Strain and Stress Model for Magnetostrictive Transducers. Fort Belvoir, VA: Defense Technical Information Center, January 1999. http://dx.doi.org/10.21236/ada446009.

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