A COMPUTATIONAL APPROACH FOR EVALUATING HELICAL COMPRESSION SPRINGS
Helical compression springs are generally synthesized and evaluated by determining the maximum torsional stress, fatigue life, natural frequency, and/or load loss due to stress relaxation. To this end, researchers have developed finite element analysis (FEA) modeling methods to simulate the design performance of helical compression springs. The intent of this paper was to make a useful contribution to the published works for evaluating round wire helical compression springs. Specifically, commercially available FEA software was used to construct a structural model of a helical compression spring to simulate its full range of compression. The proposed FEA modeling methodology considers coil-to-coil contact and the end coils were modeled as rigid surfaces. With 9 mm of compression, the predicted spring rate correlated with the analytically calculated value to within 5%.
DESIGN AND ANALYSIS OF HELICAL SPRING IN TWO WHEELER SUSPENSION SYSTEM USING FINITE ELEMENT METHOD
1Research Scholar, Industrial & Production Engineering Department, Shri G.S. Institute of Technology & Science, 23 Park Road, Indore, M.P., India 2Assistant Professor, Industrial & Production Engineering Department, Shri G.S. Institute of Technology & Science, 23 Park Road, Indore, M.P., India ---------------------------------------------------------------------***--------------------------------------------------------------------Abstract Automobile suspension plays an important role in passenger comfort and stability of the vehicle. In this research paper helical spring related to the light vehicle suspension systems under the effect of a uniform loading has been studied and a model is created for the existing design of CBZ extreme bike helical coil spring together with modified profiles of helical spring square and square fillet by using modeling software Creo Parametric 2.0
Experimental study on bond behavior between high-strength grout and deformed steel bars
Abstract Engineers use high-strength grout to connect precast concrete members for its low shrinkage and good fluidity. This paper designed 87 central pull-out specimens using the control variable method to investigate the influence of factors on the rebar-grout bond property such as compressive strength, steel grade, bar diameter, transverse stirrups, and bond length. The test result showed that improving grout compressive strength (85.8 MPa–122.7 MPa) cannot improve the bond strength, which was different from the previous conclusions of concrete pull-out tests. Simplified formulas were presented for calculating the characteristic values of bond strength, residual strength, peak slip, and relative slip of load-holding platform based on parameter analysis. Then, a constitutive model was proposed to predict the full-range bond stress-slip curve of high-strength grout and steel bar specimens from bearing to failure. Finally, FEA models were established to evaluate the applicability and accuracy of the constitutive model.