Dissertation > Excellent graduate degree dissertation topics show

Numerical Analysis of the Bifurcation Problem of Nano-scale Thin Metal Film Under Tension

Author: ZhangShiJie
Tutor: WangShiBin
School: Tianjin University
Course: Solid Mechanics
Keywords: Nanofilm Bifurcation Fracture Deform Necking Perturbation analysis
CLC: O484.2
Type: Master's thesis
Year: 2010
Downloads: 21
Quote: 0
Read: Download Dissertation


The numerical analysis is carried on the the metal nanofilm stretch bifurcation problem. First study the long-wave disturbances under separate metal films significantly inhomogeneous deformation, and compared with the linear perturbation analysis results in the long-wave disturbances; dramatically uneven deformation of the metal film on polymer substrate numerical analysis, and compared with linear perturbation analysis results; numerical simulation results of these two sets of separate metal film and metal film glued to the polymer substrate, substrate inhibition of the metal film substantially inhomogeneous deformation. Of elasticity and the thickness of the substrate and the film of the substrate than the deformation of the nano-metal thin film has an important influence. In order to study the influence of these two factors on the deformation, according to the different ratios of the substrate and film thickness, the design and three groups of calculation, and do a comparison between these three groups, and each group calculated, based on elastic modulus of the substrate, the amount divided into three cases, the contrast in the middle of these three cases. Obtained in the calculation process, the the three deformation mode of the composite structure of the film substrate. When a relatively large substrate flexible, the film is formed in the gap at a necked base and therefore in the vicinity of the film-necked local distortions. Just as linear perturbation analysis and forecast, as the flexible large base does not inhibit the strain within the metal film. When the elasticity of the substrate in the middle state, the metal film forming a plurality of necking, and to withstand large tensile strain, and then in the notch at the fracture. When the substrate relatively large rigidity, the metal thin film can be in a great strain range uniform deformation without fracture. Substrate Young's modulus of the same case, the substrate is thicker the critical bifurcated strain of the composite structure of the film substrate, the greater. In order to study the film substrate interface adhesion properties of tensile properties of composite structures, cohesive unit in ABAQUS simulation of the film-substrate interface. In the two dimensionless parameters to describe the strength of the interface. Calculated that the adhesion properties of the interface, the tensile properties of the film base structure is not the same, the calculation results obtained three deformation mode. And further study of the interface opening displacement and sliding displacement of the metal film necking and interface strength to strength and cut fracture strain. Calculated that the fracture strain of the metal thin film on the interface shear strength is more sensitive.

Related Dissertations

  1. The Study of Dynamic Simulation of the Passive Dynamic Quasi-Quarupedal Walker,TP242.6
  2. Clinical Study of the Extremely Low-frequency Pulsed Electromagnetic Fields on Accelerating Fracture Healing,R683
  3. The Clinical Effect Analysis of Percutaneous Iliosacral Screws Osteosynthesis for Unstable Pelvic Fractures,R687.3
  4. The Study and Application of the Generalized Hamiltonian System with Spherical Foliation Structure,O175
  5. Effects of Chinese Medicine Herbs Jiegusan on Fracture Healing in Dogs,S858.292
  6. Multi-pin Internal Fixation of Calcaneal Fractures in Finite Element Analysis,R687.3
  7. With Delay fishing items and based on the ratio of prey - predator model,O175
  8. Preliminary Study the Supporting Role of Reconstruction Interlocking Nail in Comminuted Fracture of Tibia Fracture Fragments and Fibula Fixtion,R687.3
  9. Comparative Efficacy with Locking Plate and the Normal Plate for Treatment of Elderly Tibial Plateau Fractures in Schatzker Ⅱ, Ⅲ Type,R687.3
  10. The Curative Effect Contrast between the Percutaneous Hollow Compression Screw Internal Fixation and the Prosthetic Replacement for Joint in the Senile Osteoporosis Femoral Neck Fracture,R687.3
  11. Analysis of the Operative Outcomes in 36 Cases with Complicated Acetabular Fracture,R687.3
  12. The Comparison Study Between the stoppa Approach and the Ilioinguinal Approach in the Application of Anterior Pelvis Ring Fracture,R687.3
  13. Effect of Anatomic Locking Compression Plate and Dynamic Hip Screw in Treatment of Femoral Intertrochanteric Fracture,R687.3
  14. Treatment of Thoracolumbar Unstable and Burst Fractures by Interbody Fusion and Stabilization: Anteriorversus Posterior Approach,R687.3
  15. The Outcome between Interlocking Minimally Invasive Percutaneous Plating and Interlocking Intramedullary Nailing in Treating with Fractures of the Lower Tibia,R687.3
  16. Minimally Invasive Locking Plate Fixation for Treatment of Pilon Fracture,R687.3
  17. Based on the information eco -strand breaks Synergetics Research,G201
  18. Open reduction and internal fixation combined with bone intra-articular calcaneal fractures efficacy analysis,R687.3
  19. Blind intramedullary nail distal lower limb anatomy set method and its application,R687.3
  20. Clinical and Radiologic Study of Percutaneous Pillar for Vertebral Compression Fracture,R687.3
  21. OCM Approach Versus Modified Hardinge Approach for Total Hip Replacement,R687.4

CLC: > Mathematical sciences and chemical > Physics > Solid State Physics > Thin Film Physics > Mechanical effects in the film
© 2012 www.DissertationTopic.Net  Mobile