Cohesive interface behaviour and local shear strains in axially loaded composite annular tubes

2017 ◽  
Vol 160 ◽  
pp. 1126-1135 ◽  
Author(s):  
Agostina Orefice ◽  
Geminiano Mancusi ◽  
Luciano Feo ◽  
Fernando Fraternali
Keyword(s):  
Cohesive Interface ◽  
Local Shear ◽  
Shear Strains ◽  
Axially Loaded ◽  
Interface Behaviour

Local Shear Deformation in Whole Cartilage Explants Determined by Texture Correlation

2011 ◽  
Author(s):  
Jonathan T. Henderson ◽  
Garrett Shannon ◽  
Kai Yuen ◽  
Corey P. Neu
Keyword(s):  
The United States ◽  
Cartilage Explants ◽  
Mechanical Stimuli ◽  
Cartilage Homeostasis ◽  
Cellular Mechanotransduction ◽  
Wear And Tear ◽  
Prevalent Disease ◽  
Local Shear ◽  
Mechanical Factors ◽  
Shear Strains

Osteoarthritis (OA) is a prevalent disease, afflicting 27 million people in the United States alone [1]. OA is commonly thought of as “wear and tear” of the joints caused by repeated compression and shear strains. The mechanical contribution to the onset and progression of OA is unknown; however, it is likely a result of an imbalance of cartilage homeostasis, represented by a shift in biochemical and mechanical factors that typically maintain healthy joints [2]. Cartilage homeostasis results in part from cellular mechanotransduction events, i.e. the conversion of mechanical stimuli into a biochemical response.

A Simple Model for Cornering and Belt-edge Separation in Radial Tires

1986 ◽  
Vol 14 (1) ◽  
pp. 3-32 ◽  
Author(s):  
P. Popper ◽  
C. Miller ◽  
D. L. Filkin ◽  
W. J. Schaffers
Keyword(s):  
Simple Model ◽  
Transverse Shear ◽  
Mathematical Analysis ◽  
Pure Bending ◽  
Radial Tire ◽  
Optimum Angle ◽  
Shear Strains ◽  
Interlaminar Shear ◽  
Edge Separation ◽  
Shear Bending

Abstract A mathematical analysis of radial tire cornering was performed to predict tire deflections and belt-edge separation strains. The model includes the effects of pure bending, transverse shear bending, lateral restraint of the carcass on the belt, and shear displacements between belt and carcass. It also provides a description of the key mechanisms that act during cornering. The inputs include belt and carcass cord properties, cord angle, pressure, rubber properties, and cornering force. Outputs include cornering deflections and interlaminar shear strains. Key relations found between tire parameters and responses were the optimum angle for minimum cornering deflections and its dependence on cord modulus, and the effect of cord angle and modulus on interlaminar shear strains.

Behaviour Analysis of Axially Loaded Glued-in Timber-steel Joints

2001 ◽  
Vol 85 (1) ◽  
pp. 1-6
Author(s):  
Massimo Del Senno ◽  
Maurizio Piazza ◽  
Roberto Tomasi
Keyword(s):  
Behaviour Analysis ◽  
Axially Loaded ◽  
Steel Joints

Response and modeling of axially-loaded concrete-filled steel columns with recycled coarse and fine aggregate

2021 ◽  
Vol 234 ◽  
pp. 111733 ◽  
Author(s):  
Mu-Zi Zhao ◽  
Yu-Yin Wang ◽  
Dawn E. Lehman ◽  
Yue Geng ◽  
Charles W. Roeder
Keyword(s):  
Fine Aggregate ◽  
Steel Columns ◽  
Axially Loaded

scholarly journals Floor Heave Mechanism and Anti-Slide Piles Control Technology in Deep and Large-Span Chamber

2021 ◽  
Vol 11 (10) ◽  
pp. 4576
Author(s):  
Jian Shi ◽  
Desen Kong
Keyword(s):  
Model Test ◽  
Shear Failure ◽  
Deformation Mode ◽  
Control Technology ◽  
Plastic Limit ◽  
Large Span ◽  
Similarity Model ◽  
Floor Heave ◽  
Plastic Limit Analysis ◽  
Local Shear

Based on plastic limit analysis, the deformation and fracture mechanism of the floor in the large-span chambers of deep mines are discussed and a similarity model test is carried out to verify the reliability of the theoretical analysis. The results show that the local shear failure first appears below the loading area and develops to the middle part of the test model with the increase in load; when the local shear failure develops to form a continuous sliding surface, continuous plastic flow deformation occurs; the distribution of the plastic zone and the deformation mode obtained from the similarity model test are basically consistent with the Hill-like deformation mode derived from plastic limit analysis. A control technology with anti-slide piles is proposed in order to deal with floor heave in large-span chambers on the basis of previous work. An approach for determining the supporting parameters of anti-slide piles is deduced. To deal with the floor heave in the −1100 level gangue winch room of the Huafeng Coal Mine, a comprehensive reinforcement scheme with anti-slide piles composed of discarded rails and anti-floating anchors is introduced for the floor heave control of the chambers. Site monitoring results show that the scheme not only effectively restrains the development of floor heave, but also ensures the long-term stability of the chamber floor.

scholarly journals Friction Capacity of Axially Loaded Model Pile in Sand

1995 ◽  
Vol 35 (1) ◽  
pp. 75-82 ◽  
Author(s):  
Maher Amira ◽  
Yukimitsu Yokoyama ◽  
Shigeyoshi Imaizumi
Keyword(s):  
Model Pile ◽  
Axially Loaded ◽  
Friction Capacity

scholarly journals Comparative 3D DEM simulations of sand–structure interfaces with similarly shaped clumps versus spheres with contact moments

2021 ◽  
Author(s):  
A. Grabowski ◽  
M. Nitka ◽  
J. Tejchman
Keyword(s):  
Particle Shape ◽  
Friction Angle ◽  
Rigid Wall ◽  
Numerical Results ◽  
Contact Forces ◽  
Interface Roughness ◽  
Interface Shear ◽  
Dem Simulations ◽  
Micropolar Continua ◽  
Interface Behaviour

AbstractThree-dimensional simulations of a monotonic quasi-static interface behaviour between initially dense cohesionless sand and a rigid wall of different roughness during tests in a parallelly guided direct shear test under constant normal stress are presented. Numerical modelling was carried out by the discrete element method (DEM) using clumps in the form of convex non-symmetric irregularly shaped grains. The clumps had an aspect ratio of 1.5. A regular grid of triangular grooves (asperities) along the wall with a different height at the same distance was assumed. The numerical results with clumps were directly compared under the same conditions with our earlier DEM simulations using pure spheres with contact moments with respect to the peak and residual interface friction angle, width of the interface shear zone, ratio between grain slips and grain rotations, distribution of contact forces and stresses. The difference between the behaviour of clumps and pure spheres with contact moments proved to be noticeable in the post-peak regime due to a different particle shape. The rolling resistance model with pure spheres was proved to be limited for capturing particle shape effects. Three different boundary conditions along the interface were proposed for micropolar continua, considering grain rotations and grain slips, wall grain moments and wall grain forces, and normalized interface roughness. The numerical results in this paper offer a better understanding of the interface behaviour of granular bodies in DEM and FEM simulations.

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