The aim of this book is to present up-to-date methodologies in the analysis and optimization of the elastic stability of lightweight statically determinate, and especially indeterminate, space structures made of flexible members which are highly stiff when loaded centrally at the nodes. Space structures of this type are generally subjected to considerable internal axial loads in the flexible members and they fail through the loss of global and statical stability. Thus, the criterion in the design of such structures calls for eliminating or isolating the onset of the elastic dynamic collapse…mehr
The aim of this book is to present up-to-date methodologies in the analysis and optimization of the elastic stability of lightweight statically determinate, and especially indeterminate, space structures made of flexible members which are highly stiff when loaded centrally at the nodes. Space structures of this type are generally subjected to considerable internal axial loads in the flexible members and they fail through the loss of global and statical stability. Thus, the criterion in the design of such structures calls for eliminating or isolating the onset of the elastic dynamic collapse thereby increasing their safe stability limit. Standard finite elements are totally inadequate for such analyses since they do not account for the choice of the branching paths in the loading process of the structure nor for the existence of the relevant collapse modes. These aspects are novel and they are here presented for the first time in comprehensive book form.
1 The Post Buckling Analysis of Pin Connected Slender Prismatic Members. 1.1 The Post Buckling Behavior of Single Pin Ended Elastic Members General Law of Pin Jointed Members. 1.2 Elastic Buckling of Pin Jointed Plane Isostatic Trusses Composed of Flexible Bars. 1.3 Thermal Buckling of Axially Constrained Compressive Pin Jointed Slender Members. 1.4 Thermal Post Buckling of Flexible Elastic Members in Statically Indeterminate Pin Jointed Lattices An Illustration of the Basic Theory. 2 The Post Buckling Equilibrium of Isostatic Hinge Connected Space Structures Composed of Slender Members. 2.1 General Force Displacement Equilibrium Paths for Perfect Members. 2.2 Geometrical Compatibility Conditions in Space. 2.3 Initial Kinematic Relations. 2.4 Kinematic Relations in Post Buckling. 2.5 Initial Equilibrium States. 2.6 Unsupported Structures Initial Kinematic and Equilibrium Conditions. 2.7 Equilibrium in Post Buckling. 2.8 Alternative Derivation of the Post Buckling Equilibrium Equations. 2.9 Alternative Derivation of the Post Buckling Equilibrium Equations Matrix Formulation of the General Law. 2.10 Alternative Derivation of the Post Buckling Equilibrium Equations Matrix Formulation of the Equilibrium Equations on the Distorted Geometry. 2.11 The Post Buckling Equilibrium States. 2.12 Reduction of the General Equilibrium Equations and Their Solution. 2.13 Some Applications of the Theory to Simple Space Structures Made of Flexible Elastic Members. 2.14 Influence of Initial Imperfections on the Post Buckling Equilibrium Paths of Pin Connected Lattices Composed of Flexible Members. 2.15 Stability Analysis of Equilibrium States. 2.16 Some Applications of the Stability Theory to Practical Space Lattices and Structures. 3 Static and DynamicBuckling of Complex Hyperstatic Pin Connected Elastic Systems. 3.1 Introduction Post Buckling of Hyperstatic Lattices. 3.2 Initial Equilibrium Equations Kinematic Admissibility Conditions at the Ultimate Critical State. 3.3 Simplified Kinematic Admissibility Conditions for the Buckled Hyperstatic Lattice. 3.4 Matrix Formulation of the General Law for Prismatic Pin Jointed Members in a Hyperstatic Lattice. 3.5 Matrix Formulation of the General Post Buckling Equilibrium Equations for Hyperstatic Pin Jointed Lattices. 3.6 Reduction of the General Equilibrium Equations of the Hyperstatic Lattice and Their Solution. 3.7 Direct Evaluation of the Most Degrading Buckling Mode in Equilibrium Using the Total Potential Energy Hypersurfaces. 3.8 Comparison of the Numerical Results Characterizing the Post Buckling Equilibrium of Three Model Reticulated Shells for Underwater Applications. 3.9 The Most Degrading Post Buckling Modes for the Three Model Reticulated Shells Intended for Underwater Applications. 3.10 Minimization Methods in the Direct Evaluation of the Most Degrading Buckling Modes. 3.11 Numerical Evaluation of the Most Degrading Dynamic and Static Buckling Modes and the Structural Stability Optimization Strategies in Hyperstatic Pin Jointed Elastic Systems. 3.12 Structural and Material Features of Practical Optimizable Elastic Systems Pin Jointed by Special Connectors The BRISHELL Systems. The Figure Source Index.
1 The Post Buckling Analysis of Pin Connected Slender Prismatic Members. 1.1 The Post Buckling Behavior of Single Pin Ended Elastic Members General Law of Pin Jointed Members. 1.2 Elastic Buckling of Pin Jointed Plane Isostatic Trusses Composed of Flexible Bars. 1.3 Thermal Buckling of Axially Constrained Compressive Pin Jointed Slender Members. 1.4 Thermal Post Buckling of Flexible Elastic Members in Statically Indeterminate Pin Jointed Lattices An Illustration of the Basic Theory. 2 The Post Buckling Equilibrium of Isostatic Hinge Connected Space Structures Composed of Slender Members. 2.1 General Force Displacement Equilibrium Paths for Perfect Members. 2.2 Geometrical Compatibility Conditions in Space. 2.3 Initial Kinematic Relations. 2.4 Kinematic Relations in Post Buckling. 2.5 Initial Equilibrium States. 2.6 Unsupported Structures Initial Kinematic and Equilibrium Conditions. 2.7 Equilibrium in Post Buckling. 2.8 Alternative Derivation of the Post Buckling Equilibrium Equations. 2.9 Alternative Derivation of the Post Buckling Equilibrium Equations Matrix Formulation of the General Law. 2.10 Alternative Derivation of the Post Buckling Equilibrium Equations Matrix Formulation of the Equilibrium Equations on the Distorted Geometry. 2.11 The Post Buckling Equilibrium States. 2.12 Reduction of the General Equilibrium Equations and Their Solution. 2.13 Some Applications of the Theory to Simple Space Structures Made of Flexible Elastic Members. 2.14 Influence of Initial Imperfections on the Post Buckling Equilibrium Paths of Pin Connected Lattices Composed of Flexible Members. 2.15 Stability Analysis of Equilibrium States. 2.16 Some Applications of the Stability Theory to Practical Space Lattices and Structures. 3 Static and DynamicBuckling of Complex Hyperstatic Pin Connected Elastic Systems. 3.1 Introduction Post Buckling of Hyperstatic Lattices. 3.2 Initial Equilibrium Equations Kinematic Admissibility Conditions at the Ultimate Critical State. 3.3 Simplified Kinematic Admissibility Conditions for the Buckled Hyperstatic Lattice. 3.4 Matrix Formulation of the General Law for Prismatic Pin Jointed Members in a Hyperstatic Lattice. 3.5 Matrix Formulation of the General Post Buckling Equilibrium Equations for Hyperstatic Pin Jointed Lattices. 3.6 Reduction of the General Equilibrium Equations of the Hyperstatic Lattice and Their Solution. 3.7 Direct Evaluation of the Most Degrading Buckling Mode in Equilibrium Using the Total Potential Energy Hypersurfaces. 3.8 Comparison of the Numerical Results Characterizing the Post Buckling Equilibrium of Three Model Reticulated Shells for Underwater Applications. 3.9 The Most Degrading Post Buckling Modes for the Three Model Reticulated Shells Intended for Underwater Applications. 3.10 Minimization Methods in the Direct Evaluation of the Most Degrading Buckling Modes. 3.11 Numerical Evaluation of the Most Degrading Dynamic and Static Buckling Modes and the Structural Stability Optimization Strategies in Hyperstatic Pin Jointed Elastic Systems. 3.12 Structural and Material Features of Practical Optimizable Elastic Systems Pin Jointed by Special Connectors The BRISHELL Systems. The Figure Source Index.
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