An eXtended Finite Element Model for Characterization of Concrete Fracture Properties with Compact Tension Tests

2010 ◽  
Author(s):  
Qingli Dai ◽  
Kenny Ng
Keyword(s):  
Finite Element ◽  
Finite Element Model ◽  
Element Model ◽  
Compact Tension ◽  
Concrete Fracture ◽  
Extended Finite Element ◽  
Fracture Properties ◽  
Tension Tests

scholarly journals Experimental and numerical characterization of the interface between concrete masonry block and mortar

2020 ◽  
Vol 13 (3) ◽  
pp. 578-592
Author(s):  
R. D. PASQUANTONIO ◽  
G. A. PARSEKIAN ◽  
F. S. FONSECA ◽  
N. G.SHRIVE
Keyword(s):  
Finite Element ◽  
Finite Element Model ◽  
Element Model ◽  
Physical Models ◽  
The Finite Element Method ◽  
Numerical Characterization ◽  
Tension Tests ◽  
Analytical Research ◽  
The Finite Element Model

Abstract Masonry is a construction system that has been used since the beginning of civilization and is still used throughout the world. The finite element method is a recent development that allows complex problems, including structural masonry problems, to be solved. A vast amount of literature exists on finite element modeling, using software such as ABAQUS, to represent experimental masonry models. Based on this established pattern, an experimental and analytical research program was designed and implemented. Thus, a set of tests was conducted to determine the compressive and tensile strengths of the masonry components, i.e., block, mortar, and grout. Bond wrench tests, diagonal tension tests, and horizontal joint shear tests were conducted to characterize the interface between the blocks and the mortar. A finite element model was then developed to represent the physical models and the general conclusion is that the finite element model was able to represent reasonably well the physical models.

Design and characterization of a hybrid soft gripper with active palm pose control

2020 ◽  
Vol 39 (14) ◽  
pp. 1668-1685 ◽  
Author(s):  
Vignesh Subramaniam ◽  
Snehal Jain ◽  
Jai Agarwal ◽  
Pablo Valdivia y Alvarado
Keyword(s):  
Finite Element ◽  
Finite Element Model ◽  
Composite Structure ◽  
Element Model ◽  
Open Loop ◽  
Aspect Ratios ◽  
Maximum Payload ◽  
Wide Range ◽  
Pose Control

The design and characterization of a soft gripper with an active palm to control grasp postures is presented herein. The gripper structure is a hybrid of soft and stiff components to facilitate integration with traditional arm manipulators. Three fingers and a palm constitute the gripper, all of which are vacuum actuated. Internal wedges are used to tailor the deformation of a soft outer reinforced skin as vacuum collapses the composite structure. A computational finite-element model is proposed to predict finger kinematics. Thanks to its active palm, the gripper is capable of grasping a wide range of part geometries and compliances while achieving a maximum payload of 30 N. The gripper natural softness enables robust open-loop grasping even when components are not properly aligned. Furthermore, the grasp pose of objects with various aspect ratios and compliances can be robustly maintained during manipulation at linear accelerations of up to 15 m/s2 and angular accelerations of up to 5.23 rad/s2.

Finite element model for the characterization of deleterious phases by eddy current technique

2012 ◽  
Vol 39 (1-4) ◽  
pp. 305-310 ◽  
Author(s):  
Maria C.L. Areiza ◽  
Rodrigo Sacramento ◽  
Joao M.A Rebello ◽  
Rubem L. Sommer ◽  
Diego Gonzalez
Keyword(s):  
Finite Element ◽  
Finite Element Model ◽  
Eddy Current ◽  
Element Model ◽  
Current Technique

An extended finite element model for CO2sequestration

2013 ◽  
Vol 23 (8) ◽  
pp. 1421-1448 ◽  
Author(s):  
Mojtaba Talebian ◽  
Rafid Al-Khoury ◽  
Lambertus J. Sluys
Keyword(s):  
Finite Element ◽  
Finite Element Model ◽  
Element Model ◽  
Extended Finite Element

Characterization of Delamination in Laser Microtransfer Printing

2014 ◽  
Vol 2 (1) ◽  
Author(s):  
Ala'a M. Al-okaily ◽  
John A. Rogers ◽  
Placid M. Ferreira
Keyword(s):  
Finite Element ◽  
Finite Element Model ◽  
Laser Heating ◽  
Thermal Gradient ◽  
Heterogeneous Materials ◽  
Element Model ◽  
Extensive Study ◽  
Materials Integration ◽  
Gradient Fields

Microtransfer printing is rapidly emerging as an effective method for heterogeneous materials integration. Laser microtransfer printing (LMTP) is a noncontact variant of the process that uses laser heating to drive the release of the microstructure from the stamp. This makes the process independent of the properties or preparation of the receiving substrate. In this paper, an extensive study is conducted to investigate the capability of the LMTP process. Furthermore, a thermomechanical finite element model (FEM) is developed, using the experimentally observed delamination times and absorbed powers, to estimate the delamination temperatures at the interface, as well as the strain, displacement, and thermal gradient fields.

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