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 profiles in an electric vehicle suspension system using finite element method
Automobile suspension plays an important role in vehicle safety, passenger comfort and safety. During a mechanical deformation/vibration the suspension would absorb most of the energy (mechanical vibrations) and would ensure safety and comfort, most of the kinetic energy would be dissipated as Vertical motion in the vehicle. In this research paper a helical spring related to an electronic vehicle system with two different profiles under the effect of a uniform load have been studied. A model is created for an electric vehicle helical coil spring with modified profiles of the helical spring as circular and triangular fillet by using modelling software Solid works 2017. This research paper deals with the detailed analysis of the suspension system by using ANSYS workbench 18.1 simulation software. Using the Finite element approach, results are compared on the basis of Static Structure analysis. In addition, the results for the various spring profiles are compared.
Analogy, Supposition, and Transcendentality in Narrative Argument
Rodden writes, “How do stories persuade us? How do they ‘move’—and move us? The short answer: by analogies.” Rodden’s claim is a natural first view, also held by others. This chapter considers the extent to which this view is true and helpful in understanding how fictional narratives, taken as wholes, may be argumentative, comparing it to the two principal (though not necessarily exclusive) alternatives that have been proposed: understanding fictional narratives as exhibiting the structure of suppositional argument, or the structure of a kind of transcendental argument. Three key aspects of understanding a fictional narrative as an argument from analogy are identified. First, the argument will be relativistic or depend in an essential way upon the circumstances or intentions of the auditor or author. Second, in view of the first aspect, the argument will be loose and subjective, and accordingly less likely to yield knowledge. Third, the argument will not exhibit a distinctive structure applicable only to fictional narratives. I find that the third, and sometimes the first and second, of these same three aspects apply to understanding fictional narratives as suppositional arguments. I present considerations that point to a way of establishing that some extended fictions exhibit the structure of a kind of transcendental argument that is neither relativistic nor subjective, is knowledge-generating, and is uniquely applicable to fictional narratives. This supports literary cognitivism—the thesis that “literary fiction can be a source of knowledge in a way that depends crucially on its being fictional.”