Theoretical and Experimental Studies on Temperature Dependence of the Mechanical Behavior of Polymer Solids by a Creep Recovery Method. Part 2. Penetration of a Steel Ball

1966 ◽  
Vol 10 (1) ◽  
pp. 97-132 ◽  
Author(s):  
Torao Ojima ◽  
Minori Nishimura ◽  
Mizuho Ono ◽  
Katsuhiko Ito
Keyword(s):  
Mechanical Behavior ◽  
Temperature Dependence ◽  
Experimental Studies ◽  
Steel Ball ◽  
Creep Recovery ◽  
Recovery Method

Investigation on Mechanical Properties of Fibreglass Reinforced Flexible Pipes Under Torsion

2018 ◽  
Author(s):  
Pan Fang ◽  
Yuxin Xu ◽  
Shuai Yuan ◽  
Yong Bai ◽  
Peng Cheng
Keyword(s):  
Mechanical Behavior ◽  
Torsion Angle ◽  
Experimental Studies ◽  
Three Dimensional ◽  
Load Condition ◽  
Element Model ◽  
Flexible Pipe ◽  
Torsional Load ◽  
Flexible Pipes ◽  
The Impact

Fibreglass reinforced flexible pipe (FRFP) is regarded as a great alternative to many bonded flexible pipes in the field of oil or gas transportation in shallow water. This paper describes an analysis of the mechanical behavior of FRFP under torsion. The mechanical behavior of FRFP subjected to pure torsion was investigated by experimental, analytical and numerical methods. Firstly, this paper presents experimental studies of three 10-layer FRFP subjected to torsional load. Torque-torsion angle relations were recorded during this test. Then, a theoretical model based on three-dimensional (3D) anisotropic elasticity theory was proposed to study the mechanical behavior of FRFP. In addition, a finite element model (FEM) including reinforced layers and PE layers was used to simulate the torsional load condition in ABAQUS. Torque-torsion angle relations obtained from these three methods agree well with each other, which illustrates the accuracy and reliability of the analytical model and FEM. The impact of fibreglass winding angle, thickness of reinforced layers and radius-thickness ratio were also studied. Conclusions obtained from this research may be of great practicality to manufacturing engineers.

Investigation on Mechanical Properties of Fiberglass Reinforced Flexible Pipes Under Bending

2019 ◽  
Author(s):  
Yifan Gao ◽  
Shan Jin ◽  
Peng Cheng ◽  
Peihua Han ◽  
Yong Bai
Keyword(s):  
Mechanical Behavior ◽  
Virtual Work ◽  
Experimental Studies ◽  
Bending Moment ◽  
Element Model ◽  
Bending Test ◽  
Flexible Pipe ◽  
Four Point Bending ◽  
Flexible Pipes ◽  
Bending Behavior

Abstract Fiberglass reinforced flexible pipe (FRFP) is a kind of composite thermoplastic pipe, which has many advantages compared to boned flexible pipes. This paper describes an analysis of the mechanical behavior of FRFP under bending. The bending behavior of FRFP was investigated by experimental, analytical and numerical methods. Firstly, this paper presents experimental studies of three 10-layer FRFP in a typical four-point bending test. Curvature-bending moment relations were recorded during the test. Then, based on the nonlinear ring theory and the principle of virtual work, a simplified method was proposed to study the mechanical behavior of FRFP. In addition, a finite element model (FEM) including reinforced layers and high density polyethylene (HDPE) layers was established to simulate the HDPE layers and reinforced layers, respectively. The result of Curvature-bending moment relations obtained from three methods agree well with each other, which proves that the simplified analytical model and FEM are accurate and reliable. The conclusions of this paper could be useful to manufacturing engineers.

Simulation of Red Blood Cell Passing Through Constrictions Using Modified Moving Particle Semi-Implicit Method

2011 ◽  
Author(s):  
K. Firoozbakhsh ◽  
M. T. Ahmadian ◽  
M. Hasanian
Keyword(s):  
Mechanical Behavior ◽  
Experimental Studies ◽  
Small Time ◽  
Implicit Method ◽  
Parallel Plates ◽  
Time Step ◽  
Mps Method ◽  
Time Step Size ◽  
Small Time Step ◽  
Moving Particle

During the circulation of RBC it undergoes elastic deformation as it passes through micro-capillaries where the inner diameter of the constriction can be about 3 micro meters. It means RBC shape must be changed in order to pass through these narrow channels. The role of mechanical behavior of RBC and the deformability traits of RBC are observed with the several experimental studies [1]. Several methods were implemented to simulate the mechanical behavior of RBCs in micro-capillaries [1, 2]. One of the most recent methods is Moving Particle Semi-implicit method (MPS) which is a Lagrangian method with semi-implicit algorithm that guaranties the incompressibility of the fluid. MPS method was implemented for simulation of RBC motion through parallel plates by Tsubota et al. 2006 [3]. Due to small Reynolds number and the Diffusion number restrictions, implementation of small time step size would be necessary which leads to long time simulation. By the way in case of complex geometries or FSI problems, standard MPS method has a delicate pressure solver which leads to diverge the solution. So in these cases using a small time step can help to overcome the problem. Some studies have applied a new approach for time integration and the fractional time step method is employed to overcome the noticed problem. Yohsuke Imai and coworkers (2010) have developed the former studies with two main new approaches [4]. Firstly, evaluation of viscosity is upgraded and secondly boundary condition is assumed to be periodic. Although the developments are really impressive and MPS method has turned into a practical method for simulation of RBC motion in micro-capillaries, but still there are some considerations about using large time steps and error of the velocity profile consequently.

Experimental Studies on Thermo-Mechanical Behavior of Ultrasonically Welded PC/ABS Polymer Blends

Silicon ◽  
2017 ◽  
Vol 10 (5) ◽  
pp. 1937-1948 ◽  
Author(s):  
T. Chinnadurai ◽  
M. Natesh ◽  
S. Arungalai Vendan ◽  
R. Dinek ◽  
K. A. Ramesh Kumar
Keyword(s):  
Polymer Blends ◽  
Mechanical Behavior ◽  
Experimental Studies

scholarly journals Experimental studies of the temperature dependence of Raman frequencies for Al2O3

2016 ◽  
Vol 77 ◽  
pp. 94-98
Author(s):  
Yurii Kryvenchuk ◽  
◽  
Ihor Mykytyn ◽  
Oleh Seheda ◽  
◽  
...  
Keyword(s):  
Temperature Dependence ◽  
Experimental Studies

scholarly journals Determination of the coefficient of restitution upon contact of a steel ball with aluminum and steel surfaces

2021 ◽  
Vol 2131 (3) ◽  
pp. 032087
Author(s):  
V G Gusev ◽  
A V Sobolkov ◽  
A V Aborkin
Keyword(s):  
Experimental Studies ◽  
Three Dimensional ◽  
Calculated Data ◽  
High Energy ◽  
Complex Model ◽  
Steel Ball ◽  
Restitution Coefficient ◽  
Discrete Elements ◽  
Three Dimensional Model ◽  
Steel Surfaces

Abstract In this work, experimental studies on the rebound of a steel ball from aluminum and steel surfaces have been carried out. Using the ideology of the method of discrete elements, a three-dimensional model of the process was built. By carrying out multivariate calculations with varying the restitution coefficient and subsequent comparison of experimental and calculated data on the ball rebound height, the actual restitution coefficient for contact pairs “steel - steel” and “steel - aluminum” was determined. The results of the work will be used in the development of a complex model of high-energy ball milling.

scholarly journals A state-of-the art review of tensile behavior of the textile-reinforced concrete composite

2021 ◽  
Vol 72 (1) ◽  
pp. 127-142
Author(s):  
Tien Tran Manh ◽  
Tu Do Ngoc ◽  
Hong Vu Xuan
Keyword(s):  
Reinforced Concrete ◽  
Mechanical Behavior ◽  
State Of The Art ◽  
Experimental Studies ◽  
Tensile Behavior ◽  
Fiber Reinforced Polymer ◽  
Textile Reinforced Concrete ◽  
Characterization Methods ◽  
Reinforced Polymer ◽  
Strain Hardening Behavior

Over the past two decades, textile-reinforced concrete (TRC) materials have been increasingly and widely used for the strengthening/reinforcement of civil engineering works. Thanks to their many advantages as the durability, considerable bond strength with the reinforced concrete (RC) members, best recycling conditions, the TRC materials are considered as an optimal alternative solution to substitute the traditional strengthening and reinforcing materials FRP (Fiber-Reinforced Polymer). The mechanical behavior of TRC composite has been characterized in previous experimental studies. This paper presents a state-of-the-art review of the mechanical behavior of TRC composite under tensile loading. By inheriting from previous review studies, this paper updates the experimental studies on the tensile behavior of TRC composite in the last decade. The review addresses, firstly the mechanical properties of constituent materials in TRC as reinforcement textile, cementitious matrix, and textile/matrix interface. Secondly, it addresses the tensile behavior of TRC composite, including the characterization methods as well as analyses of its strain-hardening behavior with different phases. The paper then discusses the main factors which influence the mechanical behavior of TRC materials in the available experimental studies. Finally, the conclusion of this review terminates this paper.

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