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.
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Showing 1 to 20 of 59 for “"virtual work"”.
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The application of the law of virtual work in the solution of civil engineering structures
… the civil engineering application of the law of virtual work to the determination of defelections, shears, bending stresses in truss structures, beams, structures subjected to both direct stress and bending, and indeterminate structures, and further to give examples of their mathematical …
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Structural Optimization using the Principle of Virtual Work and an Analytical Study on Metal Buildings
… of structural systems based on the principle of virtual work was developed by Dr. Finley Charney in the early 1990s. The program was called DISPAR, which stands for DISplacement PARticipation factors, and was written to work in accordance with SAP90 and ETABS. This program became outdated once …
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A cultural analysis of information technology offshore outsourcing: an exercise in multi-sited ethnography of virtual work
… research phenomena. Research focused on the work activities of one American client organization and its Indian IT service provider situated in the global virtual field of Information Technology (IT) offshore outsourcing. The Principal Investigator adapted and applied an ethnographic approach …
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The employee wellbeing in face-to-face and virtual work: an exploration of the role of SMART work design
… of this study was to assess to what degree SMART work design and its individual dimensions can predict wellbeing, and the relative importance of the five dimensions (stimulation, mastery, agency, relationship, tolerable demands) in predicting wellbeing, amongst individuals working either mostly …
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A study of lamella in structural steel
… analysis is a combination of graphic statics and virtual work. Graphic statics was used to determine the pressure line of the arches and virtual work summations were used to determine the redundant loads and reactions. At the conclusion the structure is compared on a tonnage of steel basis, with a …
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ΜΗ ΓΡΑΜΜΙΚΑ ΠΡΟΒΛΗΜΑΤΑ ΛΕΠΤΟΤΟΙΧΩΝ ΔΙΑΤΟΜΩΝ
… HAVE NOT BEEN FORMULATED ANDSTUDIED IN THE FRAMEWORK OF STRUCTURES INCLUDING THIN WALLED BEAMS, BUT ONLY FOR CLASSICAL BEAMS AND PLATES AS WELL AS FOR FRAMES AND TRUSSES. THIS IS ATTEMPTED IN THE PRESENT WORK, FOR OPEN CROSS SECTION THIN WALLED BEAMS AND GENERALLYFOR STRUCTURES CONTAINING SUCH …
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Análise dinâmica linear de cascas axissimétricas com um elemento finito curvo
… conditions are obtained from the Principle of Virtual work. To determine the aproximate solution one applies the Finite Element Method using a curved element with three and four degrees of freedom per node. The linear dynamic response is obtained by the Modal Superposition Method supposing a …
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Design optimization of permanent magnet actuators.
… of devices by non-linear lumped reluctance networks is considered, with particular regard to the level of discretization required to produce accurate global quantities. The accuracy of the lumped reluctance technique is assessed by comparison with non-linear finite element analysis. Alternative …
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The Effects of Shear Deformation in Rectangular and Wide Flange Sections
… element analysis based on the principle of virtual work is used for analyzing rectangular and wide flange sections. The validity of the new method was established by analyzing rectangular sections for which closed form solutions for form factor were available. The form factors of various …
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Analysis of a circular arch by the Rayleigh-Ritz method
… a conventional method using the dummy load and virtual work techniques. Results are compared and found to be good. In both methods, account is taken of bending and axial forces; shear distortion is neglected. For the Rayleigh-Ritz method where undetermined coefficients are evaluated, a …
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Plastic buckling of initially imperfect stiffened cylinders in axial compression
… the stiffened shell is used in the principle of virtual work to obtain a set of non-linear algebraic equations whose solution provides complete information about the prebuckling equilibrium path. Bifurcation from the primary path is examined by making use of a functional whose first variation is …
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Stresses and deformations in cross-ply composite tubes subjected to circumferential temperature gradients
… and uses the principle of complementary virtual work in conjunction with a Ritz approximation on the stress field. The elasticity solution predicts that high tensile stresses could crack the matrix. The effect of including temperature-dependent material properties is to reduce the …
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Kinematic Analysis of Tensegrity Structures
… (rigid bars) suspended by a continuous network of tension members (cables). Tensegrity structures can be used as variable geometry truss (VGT) mechanisms by actuating links to change their length. This paper will present a new method of position finding for tensegrity structures that can be …
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Resposta dinâmica e estabilidade de tubos com escoamento interno
In this work, a finite element model is developed to analyze: linear and non-linear transient response and free vibrations problems and dynamic stability of pipes conveying fluid. Making use of an updated lagrangian formulation for the principle of virtual work the incremental equations of motion …
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The Development and Application of a Trapezoidal Shear Panel for Use in Finite Element Codes
… developed using the principle of complementary virtual work. The internal stress field was derived from a complete polynomial Airy stress function. The element was numerically tested as a pure stress element and a hybrid element to assess the deflection properties for highly distorted planar …
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Marketing Challenges for Cybersecurity Services
… Throughout the evolution of technology in the workplace, cybersecurity services have emerged to create a more productive and safer environment for our customers. These services are technical aspects of software and the human representatives that contribute to protecting private information and …
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Managing Someone 'Less like You' From Afar: The Role of Virtual Communication Modality
<p>With the proliferation of remote work options, leaders are faced with new challenges and opportunities to manage their followers in a virtual context. However, insufficient research examines whether a follower’s perception of trust and connection with a leader change across virtual communication …
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On the behavior of viscoelastic plates in bending
… a Kelvin or a Maxwell plate. Using a generalized virtual work principle based upon irreversible thermodynamic considerations the fundamental plate equation, including shear effects, ls established. The procedure involved ls that of determining a stationary value of a certain operational invariant …
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Health Promoting Leadership in a Virtual Context
… as one of the most important aspects of the workplace as it has been linked to productivity and efficiency and significantly influences employee health and well-being. The outbreak of COVID-19 and the shift to virtual work has shifted job demands and often increased stress. Hence, effective …
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Operator-adapted finite element wavelets : theory and applications to a posteriori error estimation and adaptive computational modeling
… interpolation functions. The solution to the virtual work equation can then be expressed as a telescopic sum consisting of the solution on the coarsest mesh along with a sequence of error terms denoted as two-level errors. These error terms are the projections of the solution onto …
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