scholarly journals Numerical Modeling of Nonlinear Deformation Behavior of Shallow Tunnel by Strain-Softening Analysis

2008 ◽  
Vol 57 (2) ◽  
pp. 191-198 ◽  
Author(s):  
Shinichi AKUTAGAWA ◽  
Jae-Ho LEE ◽  
Tsutomu KITANI
Keyword(s):  
Numerical Modeling ◽  
Deformation Behavior ◽  
Nonlinear Deformation ◽  
Strain Softening ◽  
Shallow Tunnel

High-density liquid-like component facilitates plastic flow in a model amorphous silicon system

2003 ◽  
Vol 806 ◽  
Author(s):  
Michael J. Demkowicz ◽  
Ali S. Argon
Keyword(s):  
Molecular Dynamics ◽  
Plastic Flow ◽  
Deformation Behavior ◽  
Strain Softening ◽  
Low Density ◽  
Unstressed State ◽  
Plastic Deformation Behavior ◽  
Silicon System ◽  
Amorphous Si ◽  
Dynamics Simulations

ABSTRACTMolecular dynamics simulations show that plastic deformation behavior of model Stillinger-Weber amorphous Si is very sensitive to the density of the initial unstressed state. Low-density systems exhibit a pronounced yield phenomenon, strain softening, and a dramatic drop in pressure during deformation at constant volume. This behavior is explained by the interplay in every system of the prevailing solid-like and liquid-like components, with the latter being denser and more amenable to plastic flow.

Identification and prediction of deformation behavior around a shallow NATM tunnel using strain softening model

2006 ◽  
Vol 21 (3-4) ◽  
pp. 387 ◽  
Author(s):  
Shinichi Akutagawa ◽  
Jaeho Lee ◽  
Naki Doba ◽  
Takashi Kitagawa ◽  
Atsumi Isogai ◽  
...  
Keyword(s):  
Deformation Behavior ◽  
Strain Softening ◽  
Natm Tunnel

Nonlinear Deformation Behavior of Clamped Bolted Joints Under a Separating Service Load

2011 ◽  
Vol 133 (2) ◽  
Author(s):  
Sayed A. Nassar ◽  
Xianjie Yang ◽  
Satya Vijay Teja Gandham ◽  
Zhijun Wu
Keyword(s):  
Finite Element ◽  
Deformation Behavior ◽  
Nonlinear Deformation ◽  
Bolted Joints ◽  
Bolted Joint ◽  
Element Analysis ◽  
Analysis Study ◽  
Linear Elastic ◽  
Service Load ◽  
Interface Contact

The nonlinear deformation behavior of clamped bolted joints under a separating service load is investigated using finite element and experimental techniques. Although the materials for the bolted joint remain in the linear elastic range, the interface contact area between the clamped plates is sensitive to both the magnitude and the location of the separating force. This often causes nonlinear deformation behavior of the bolted joint. This finite element analysis study investigates the variation in the tension of a tightened bolt and the corresponding change in the joint clamp load due to a separating service load that is placed at various distances from the bolt center. The separating force is symmetrically placed at locations (from the bolt center) that are equal to 3–5 times the nominal diameter of the bolt. Experimental verification of the finite element results is provided.

Nonlinear Deformation Behavior of Bolted Flanges Under Tensile, Torsional, and Bending Loads

2014 ◽  
Vol 136 (6) ◽  
Author(s):  
Zhijun Wu ◽  
Sayed A. Nassar ◽  
Xianjie Yang
Keyword(s):  
Finite Element ◽  
Deformation Behavior ◽  
Nonlinear Deformation ◽  
Dynamic Strength ◽  
External Loading ◽  
Element Analysis ◽  
Axial Tensile ◽  
Element Simulation ◽  
Bending Loads ◽  
Bolted Flange

A bolted flange may be subjected to the axial tensile, torsional, and bending external loads in service. The axial tensile, torsional, and bending resistance of the bolted flange is vital for the system vibration, dynamic strength, and reliability. This paper investigates the nonlinear deformation behavior of bolted flanges under tensile, torsional, and bending loads, using finite element analysis (FEA). Even though the bolted flange materials may still deform elastically, the variation in contact area due to the external loading may still cause nonlinear deformation of the flanges. In this study, finite element simulation is used for investigating the respective nonlinear deformation behavior of a preloaded bolted flange under tensile, torsional, and bending loads, and to determine the corresponding stiffness values for each loading.

Sign in / Sign up

Export Citation Format

Share Document