Applied Mechanics and Materials Vols. 556-562

Abstract: Along with the high-speed development of social economy in our country, the country invests more in infrastructure construction. The ratio of concrete in coarse aggregate has great impact on engineering quality. If there are any proportion problems, a certain degree of engineering accidents and sometimes even devastating accidents can be caused. This article studies the correlation between concrete proportioning and cement dosage in coarse aggregate through practices, discovers the importance of reasonable selection of coarse aggregate in economic cement mixing ratio configuration process, and realizes the implementation of project cost reduction in project design.

Abstract: In this paper the characterization of the edge crack in the strip steel are studied by using numerical simulation method. The developments of the stress and strain near the crack tip are obtained and the value of the J-integral of edge crack under the rolling process is then examined. FE simulation result shows that the J-integral is not always path independent in the whole rolling process. When the crack is far away from the roller, the J-integral is path independent. When the crack enters the cold rolling region, the unload phenomena will occur near the crack tip which cause the incremental theory of plasticity failed and the conservation of the J-integral is not valid any more. The J-integral failure region is then determined by a series of FE simulations.

Abstract: The software ANSYS was used to perform the calculation of combined simulation for the track beams under eccentric load in the third wharf in a shipping company and to check whether the beams meet the requirements of safe use. In order to take into account the horizontal constraints of concrete surface slabs of high-piled wharf on track beams, a finite element model of the structure consisted of a crossbeam and piles was first established to calculate the equivalent spring restraint stiffness. Then the nonlinear finite element analysis of track beams under eccentric load was performed. The results show that the cracking of concrete cover at the tension side and the bottom of track beams under eccentric load may occur, but the tensile steel bars at the bottom of beam do not yield. It is suggested that the track beams under eccentric load must be reinforced to use them.

Abstract: Using the Drucker-Prager elastoplastic constitutive model to describe the nonlinear deformation behavior of soil and simulating step loading on static test piles by ANSYS model which only consider linear elastic compression of pile body. By comparing ANASYS simulation value and the measured values of pile’s axial force and side friction, it shows that the greater the load ratio which transfer through the bottom of the pile, the pile-soil stiffness ratio increased; when vertical load is small, analysis results of elastic theory are fairly accurate. ANASYS simulation results have high accuracy when vertical load is bigger.

Abstract: In the past time, it was neglected that different types of the deformation have an important effect on the Load-Displacement (L-D) relationship in bolt slippage. In this paper, 3D finite element models with double bolt joints are established by the ANSYS finite element package and a series of bolt slippage tests are conducted. The large lateral deformation in the process of bolt slippage is put forward for the first time. Numerical and experimental results show that large lateral deformation makes the stiffness of bolt joint smaller.

Abstract: In collapse-resistant design of a structure under accidental local action, it is important to understand the failure mechanism and alternative load paths. In this paper, a pseudo-static experimental method is proposed. Based on which, the collapse of frame structure was simulated with testing a 1/3 scale; 4-bay and 3-story plane reinforced concrete frame. In the experience, the middle column of the bottom floor was replaced by mechanical jacks to simulate its failure, and the simulated superstructure’s gravity load acted on the column of the top floor by adopting a servo-hydraulic actuator with force –controlled mode.

Abstract: Oil tank is an important component of hydraulic stripping attachment’s hydraulic system.Its design directly determines the underground work performance of hydraulic stripping attachment. In this paper,the author redesigns the fuel tank with regard to tank capacity,structure,process and other aspects,in order to reduce the risk of fuel pollution, improve heat dissipation and save of the space for component installation. The notable effect is gained in practice.

Abstract: The stress distribution properties in a single lap-jointed cantilevered adhesive beam have been investigated using three dimensional finite element methods. Finite element solutions of the stress distributions in the adhesive layer have been obtained for three typical boundary conditions. It was found that the stress concentrations are confined to a very small region near the free ends of interfaces between the adherend and the adhesive layer while the centre region of the adhesive layer is mostly stress-free. This suggests that the first failure may be expected at the free ends of interfaces between the adherend and the adhesive layer. This also implies that the adhesive material near the free ends of the adhesive layer is mainly bearing the load being transferred through the adhesive joint. The analysis results show that by choosing suitable boundary condition, the bending effect can be reduced and the strength, fatigue life and reliability of the bond can be improved.

Abstract: This paper investigates the interlaminar stress distributions of notched angle-ply thermoplastic laminate under tension numerically. The representative AS4/PEEK laminate with configuration of was studied by finite element code ANSYS. Computation results show: The interlaminar stress concentrations are evident and localized in the vicinity of the hole and the two free sides, and the maximum values always appear near the hole. Meanwhile, at interfaces of-45/+45 and +45/0, the concentration of peel stress is evident, while at interfaces of 90/-45 and 0/90, the concentration of shear stress is evident. Further analysis demonstrates interlaminar shearing stress is the dominating stress and may be the leading cause of laminate delamination.

Abstract: In this paper, the anti-bending function of the concrete beam is simulated by using ANSYS software. The simulated quantity include crack loads, yield load, ultimate load, deflection, crack and crush, stress distribution, strain distribution, movement of neutral axis and so on. The simulated model is a actual structure test. As a result, the value of the yield load, the ultimate load, the deflection are consisted with the actual loads .The method may be used on simulation of structure tests, or used in teaching of some colleges.