Narrow Results

This study aims to predict the long-term behavior of fiber-reinforced plastic (FRP) or steel plates externally strengthening RC two-way slabs using ANSYS software non-linear finite element (FE) modeling and making a comparison between the FE analysis with the experimental test results, in addition, calculated the effect of parameters on the strengthened slab behavior: compressive strength, the magnitude of sustained load, slab length to slab thickness, and the external strengthening type. The Prony series were used in the model of non-linear viscoelastic in this paper to study the deflection of time-dependent adopted. The modeling was done to solve the problems of the creep by the FEs by ANSYS software, the results showed an acceptable agreement level with the results of the experiment. The parametric study’s numerical results indicate that as sustained load increases for 20–60% Pu kN, the time-dependent deflection increases by around 2.5 times, as well as a decrease in the long-term efficiency of the slabs that external strengthening where the deflection is increased due to increased creep, and the effect creep has on the deflection.

Coriolis mass flowmeter (CMF) is widely used in the industrial field. In mass flow measurement, there are many impurities in measured fluids that will adhere to the inner wall of the vibrating tube of CMF. The vibration characteristics of CMF would change due to the structural change, i.e., wall clung state, which will generate the wall clung state fault. In this paper, aiming at the wall clung state fault of CMF, the finite element model of CMF is established based on ANSYS. The velocity distribution of fluid in the vibrating tube of CMF is analyzed, considering the fluid–structure interaction. The location of the wall clung state in a vibrating tube is determined. Then, the fault model is established. The mechanism of the vibration transmission characteristics outwards of CMF caused by the wall clung state is analyzed by harmonic response analysis. Finally, the failure mode of CMF is investigated.

In this paper, in order to obtain a larger amplitude–frequency width, a T-shaped vibration energy harvester device with 1:2 internal resonance buckling was investigated and designed in a parametric study way, whose natural frequency can be adjusted by changing the geometric parameters and buckling load exerted on the T-shaped piezoelectric beam. The effects of different model lengths and widths on the output voltage of the energy harvester were studied systematically. By comparing the difference between the variation trend of displacement value and output voltage value of harvester model, it can be concluded that internal resonance can broaden the frequency band of vibration energy collection of buckling T-shaped piezoelectric beam. Additionally, when the internal resonance ratio is 1:2, the amplitude width and voltage output value can be effectively increased. The results show that when the buckling T-shaped piezoelectric beam resonates at a ratio of 1:2, the vibration energy collection frequency band of the buckling T-shaped piezoelectric beam can also be broadened.

Thermoelectric cooling system can be used in many applications. The properties of structured point contact at the cold end affect the performance of thermoelectric cooling. The performance of metal point junctions as a function of tip radius show that the smaller the tip radius, the better the figure of merit. This paper presents the modeling and analysis of the nanotips. Each nanotip will have to carry some fraction of the weight of the thermoelectric material and the silicon slabs. The small apical area of each nanotip causes a very high pressure build up. The device may be loaded externally to ensure proper nanotip and thermoelectric material contact. A deformation of approximately 10 to 15 nm would be ideal. Finite Element Analysis (FEA) needed to be applied to determine how tall each nanotip must be to maximize soft and hard tip contacts. FEA was also needed to approximate the amount of external loading that will be necessary. ANSYS software was used in the modeling and analysis of the nanotips.

Background: Current total hip prosthesis lack an accurate individualized finite element model to assure an accurate fit, and further require amputation of a possibly healthy femoral neck.

Methods: This research presents a new methodology for performing an automated three-dimensional finite element meshing for a new type of total hip prosthesis. The stress analysis for this new design, known as Non-stemmed Anatomical Total Hip Prosthesis, is based on the methodology proposed here. The merit of this method is that the automated meshing process can be produced by using ANSYS software alone, without the need for a complicated, self-developed meshing interface program.

Results: This new methodology provides a smooth boundary around the contour of the femur and the interface between the femur and the Non-stemmed Anatomical Total Hip Prosthesis, as well as avoiding additional complications. This newly designed prosthesis involves minimal modification of the intact femoral neck alignment after total hip replacement, provided that the femoral neck is still healthy. The main body of this new prosthesis is a conical-shaped mask that tightly embraces the femoral neck. The bottom skirt of this mask contacts the greater and lesser trochanter in such a way that maintains the mask in the desired position using a screw through the axis of the femoral neck. Finite element stress analysis is performed to compare the stress distribution of the intact femur and the femur after implantation of the Non-stemmed Anatomical Total Hip Prosthesis.

Conclusions: Hopefully, this new prosthesis will be the method of choice for patients who have healthy femoral necks, but sick femoral heads. Further research can focus on applying this new methodology to other bone structures.

Level of Evidence: Therapeutic study, Level IV.

In this article, particle image velocimetry (PIV) technique was used to determine the instantaneous velocity fields inside a model of end-to-side anastomosis under various physiological flow conditions. Using ANSYS software, a three-dimensional (3D) computational model at the peak systolic blood flow was simulated. The numerical and experimental results were presented and discussed in terms of velocity fields at various locations along the graft and the host artery. The numerical results were then compared with the experimental data and a large difference was found, which was attributed to the imperfection of manufacturing the glass model and measurements error associated with PIV. The findings indicated in general that the analysis at peak systole, steady flow could help in providing essential quantitative information of the hemodynamics in anastomotic artery.

In the present paper, the flexural behavior of functionally graded carbon nanotube reinforced composite (FG-CNTRC) plate is investigated under the combined thermo-mechanical load. The carbon nanotube reinforced composite plate has been modeled mathematically based on the higher order shear deformation theory. The governing differential equation of the FG-CNTRC plate is obtained using the variational method and discretized using the suitable isoparametric finite element steps and solved numerically through a computer code developed in MATLAB environment. The material properties of the carbon nanotube reinforced composite plate are assumed to be temperature dependent and graded in the thickness direction using different grading rules. The validity and the convergence behavior of the presently proposed numerical model have been checked by comparing the responses with results available in published literature and subsequent simulation model developed in ANSYS. The effect of various design parameters (aspect ratios, support conditions, thickness ratios, volume fractions, temperature load and types of grading) on the static, stress and deformation behavior of the FG-CNTRC plate are examined under the influence of different types of loading (uniformly distributed load, sinusoidally distributed load, uniformly distributed line load, sinusoidally distributed line load and point load) and discussed detail.

This paper presents a methodology to use the software ANSYS in modeling and active vibration control of a functionally graded (FGM) plate with upper and lower surface-bonded piezoelectric layers. First a FGM plate with piezoelectric layers is designed using APDL ANSYS. Then a modal analysis has been carried out to get the first five rank frequencies and mode shapes. A proportional–integral–derivative (PID) and a linear-quadratic-based output feedback controller are introduced to realize the vibration control through a closed loop. Results for various volume fraction indexes are presented.

It has been observed by performing simple and diagonal compression tests of cob wallettes that the structural behavior of cob is highly nonlinear. This paper presents the results obtained of the simulation of cob’s nonlinear monotonic behavior using two well-known finite element commercial packages. Pros and cons of different available constitutive material models are identified and discussed. Concrete (CONCR) and Concrete Damaged Plasticity (CDP) are considered as the constitutive material models that provide the more satisfactory results reproducing cob’s nonlinear monotonic behavior when using ANSYS and ABAQUS, respectively.

There is a tremendous housing shortage in the world that can only be overcome by innovative designs and enlightened production management, such as lean construction. This paper presents a method for fast and low-cost erection of apartment housing units that have architectural flexibility, manufacturing flexibility, and erection flexibility. Flexibility is one of the fundamental aspects of lean manufacturing. The paper describes an innovative design using cam and nut jointing methods for large panel erection, and presents characteristics of an appropriate structural system to correspond to the mechanical jointing and quick erection needs. Current precast plants can quickly acquire capabilities to manufacture large panels as per the stated design using cam and nut. The cam screw and cam nut scheme is conducive to quick erection, besides being capable of withstanding all structural and natural loads. Erection speeds using this method are estimated to be about ten times as fast as conventional methods, thereby facilitating lean production. This paper presents an overall lean approach to the design, manufacture, and construction of this innovative housing system. It is believed that only through innovative systems can future technology needs of the world be met.

Sway of reinforced concrete (RC) frame subjected to lateral load is an important design parameter from serviceability point of view. In Bangladesh, brick infills are used as exterior walls and partitions. Present code of practice does not include provision of taking into consideration the structural effect of infill in multi-storeyed building construction. Yet, the presence of infill increases the lateral stiffness of the structure and reduces the value of sway. For this, if it is taken into consideration, the resulting structure will be economic. Thus, there is a scope of investigation on the importance of infill in a frame structure. In this paper, an investigation based on finite element modeling of reinforced concrete frame in the presence of masonry infill subjected to lateral loads is carried out to study the sway behavior of RC frame. The frame is modeled as a two-dimensional structure using two dimensional frame elements to model beam and columns, and the in-plane stiffness of brick wall, contributing to stiffness of the frame against lateral load, is modeled by a spring damper element. Lateral loads (seismic load) are calculated as described in Bangladesh National Building Code, 1993. Here, a ten storey and four bay building frames are taken as reference structure and an extensive investigation is performed under various parametric conditions to determine the deflection characteristics of RC frames with infill. It is hoped that this work will enable designers to capitalize on the effectiveness of using finite element modeling in reducing sway of building frame.

To solve the problem of rail crack propagation, inadequate studies mainly use a two-dimensional (2D) model for macroscopic crack analysis owing to the failure of accurately reflecting the contact status between the wheel and rail. In this work, we use ANSYS software to establish a three-dimensional (3D) wheel–rail contact model to clarify the microcracks on the rail tread. The influence of the number of horizontal and vertical cyclic loads during the rail’s fatigue crack growth is analyzed. The results suggest that as the number of vertical and tangential cyclic loads increases, the length of the rail crack increases. Using experiments to verify the law between the number of cyclic loads and rail crack growth length, the experimental findings proved that the law of crack growth is basically consistent with the aforementioned simulation results and the outcome of the Paris expansion curve, verifying the validity of the simulation results.

Composites with various layings of unidirectional plies in the conditions of a plane stress state are considered. Using the criteria of maximum stresses and Tsai–Wu, their tensile and shear strength is investigated. The dependences of the failure stresses on the direction of loading in polar coordinates are constructed. For comparison, the results of calculations by the finite element method using the ANSYS Mechanical APDL 2020 R2 program are presented.

Insight into the machining mechanism, crack creation and the chip formation in metal vibratory cutting has yet to be carried out for this technique to be used widely and efficiently. The large-scale FEM soft ware, ANSYS, is utilized for the crack creation process and for the quantitative analysis. Contrast and comparison experiments between vibratory and the conventional metal machining is done, revealing a good agreement between the simulation and the experiment and the inborn nature and the principles of the vibratory metal cutting. The fracture impact resistance in the crack tip zone becomes much lower than that in conventional cutting, other conditions being equal. In this case smaller force is required to have deformed the metal plastically and make the fracture occur. Results will be used for the aspects of the basis for workshop operation.

Electrostatic precipitators are large electrostatic equipment with a large volume and a complicated structure. Ash hoppers are an important component of electrostatic precipitators, making analyses of their mechanical performance of exceptional practical significance. This paper customized the finite element model according to the actual size of an ash hopper from an electrostatic precipitator, and then studied the stress field's distribution under the load effect of the ash hopper by using ANSYS. The results show that the calculation is highly accurate, and the model and calculation method produces reasonable figures. The results can be used for other structural and calculation analysis in future.

The dynamical model for a drawer structure with multi-layer printed circuit boards (PCBs) was established by the finite element method and the random vibration responses were analyzed in this paper. Firstly, the natural frequencies and their corresponding modes were obtained in terms of the finite element model of the drawer structure with PCBs. Secondly, the random vibration responses were obtained numerically for the drawer structure under random excitations. Finally, sensitive points on each layer of the drawer structure were selected to calculate the vibration responses and the acceleration power spectral density (PSD). The stress power spectral density of typical points on the PCB with high stress was also analyzed. The simulation results reveal that the largest vibration energy of the PCBs usually occurs in the middle layer of the structure and thus components in the middle of the PCBs are most likely to be destroyed.

In tunnel engineering, the forms of lining structure usually are similar. In order to conveniently and quickly evaluate and analyze the tunnel lining structure safety, based on the general finite element software ANSYS, a parameterized model for tunnel lining structure safety analysis with APDL and UIDL was researched in this paper. The results show as follows: The developed parameterized model using the numerical method of limit analysis of strata structure may not only conveniently and quickly evaluate and analyze the tunnel lining structure safety, but also analyze and calculate the safety factor of tunnel lining structure taking into account the effect of tunnel excavation process. The applicability and simplicity of the developed parameterized model in the paper also support its usefulness.

In order to economically and quickly design the tunnel lining structure based on the general finite element software ANSYS, a design optimization module of the tunnel lining structure with APDL and UIDL was studied in this paper. The results show as follows: the TUNNEL_ANALYSIS module developed in the paper can conveniently calculate internal forces and safety factors of tunnel lining structure, which may quickly evaluate and analyze the tunnel lining structure safety; the design optimization module developed in the paper may obtained the results of optimization conveniently for the tunnel lining structure. The applicability and simplicity of the design optimization module developed in the paper also support its usefulness. The case validation shows that the module may satisfy the requirements of engineering and study.

In this paper, we exploit the contact unit (TARGE170 and CONTA174) in ANSYS analysis software to simulate the secondary lining structure and waterproof material of tunnels. Then the longitudinal deformations of the secondary lining structure in air temperature field for cold-region are computed based on instances under different temperatures respectively. Finally, we compare the computation with the data field observed and analyze the results.

The drum is the key part of the winch. The mechanical model of drum was established in this paper, according to the actual working condition of the winch to determine the load form and the stress analysis was carried out. The calculation results were analyzed, and the drum structure was further optimized to improve. The paper provides a reference method for design of large winch drum to meet the working performance and the quality of the drum was effectively reduced.