Abstract: In order to solve the convergence problem of concrete constitutive in the softening phase, an anisotropic nonlinear elastic constitutive model (ANECM) was proposed, which was developed based on the uniaxial concrete constitutive relation in the Chinese code for design of concrete structures (GB 50010-2010). The user material subroutine (UMAT) based on ANECM is developed in ABAQUS soft...

ABAQUS can be utilized in the numerical simulation of active feedback control for the purpose of vibration suppression of structural systems. Using the example of active control of a cantilever beam, the Positive Position Feedback (PPF) control algorithm is coupled into an ABAQUS dynamical structural model with the assistance of user-defined subroutines. The transient response of the beam with ...

Analytical and numerical solutions are presented for viscoelastic lifting surfaces with piezoelectric control devices. Computational protocols in terms of spatial finite elements and temporal finite differences are formulated. ANSYS is used for mesh generation and numerical solutions are carried out in ABAQUS. Because of lack of provisions in ABAQUS for displacement dependent forces (lift), add...

The evaluation of local stability of the tunnel surrounding rock mass with weak rock layer is very important for the economy and security of the tunnel construction. Based on the rock tunnel geological conditions in the construction, the finite element model of the tunnel surrounding rock mass stability analysis with weak rock layer is established in the article by selecting the ABAQUS program ...

The Taurus has a MacPherson strut type of suspension in the front and rear of the car, as shown in Figure 1. The various types of joints in the suspension are modeled with connector elements. These specialized elements provide an easy and versatile way to model physical mechanisms with point-to-point connections that can exhibit complex kinematic and kinetic relationships. A list of model joint...

During product development, design engineers often have the freedom to modify a number of parameters. However, any design modification requires validation to ensure the satisfaction of requirements for all load cases. With Abaqus for CATIA V5 (AFC), nonlinear finite element technology is made available within the CATIA environment, allowing design engineers to efficiently incorporate accurate s...

Electroencephalography (EEG) is used to obtain information about the electrical activity in the brain and is routinely used to diagnose neurological abnormalities. The inverse problem in EEG refers to the procedure of locating electrical sources in the brain from the extracranial electrical field measured on the scalp. The solution of the inverse problem requires the forward calculation of the ...

The structural analyses contained in this report were carried out under the direction of the National Transportation Safety Board Modeling Group with the participation of Professor Toshio Nakamura through an external contract with the State University of New York at Stony Brook. Added resources and expertise were acquired through a subcontract with Dassault Systèmes Simulia Corporation for assi...

The finite element (FE) method has been widely used in predicting the structural responses of asphalt pavements. However, the three-dimensional (3D) modeling in general-purpose FE software systems such as ABAQUS requires extensive computations and is relatively time-consuming. To address this issue, a specific computational code EasyFEM was developed based on the finite layer method (FLM) for a...

Experimental studies were performed using high-fidelity broadband Glaser-NIST conical transducers to quantify stress waves produced by the elastic collision of a tiny ball and a massive plate. These sensors are sensitive to surface-normal displacements down to picometers in amplitude, in a frequency range of 20 kHz to over 1 MHz. Both the collision and the resulting transient elastic waves are ...