tag:blogger.com,1999:blog-5822805028291837738.post5124470065486888987..comments2020-10-26T05:01:40.930-04:00Comments on Various Consequences: Topology Optimization in GE Jet Engine Bracket Challenge EntryJoshua Stultshttp://www.blogger.com/profile/03506970399027046387noreply@blogger.comBlogger2125tag:blogger.com,1999:blog-5822805028291837738.post-13189701410697096962013-08-18T07:46:40.011-04:002013-08-18T07:46:40.011-04:00Here's how the entries in the contest will be ...Here's how the entries in the contest will be evaluated: <br /><i><br />1. GE will compute the weight of each entry and the entries will be ordered<br />from lightest to heaviest.<br /><br />2. Starting with the lightest entry and proceeding until we have ten<br />winners:<br />a. We will ensure that the entry fits within the exact faces of the original<br />GE bracket design. Failing this test will disqualify the entry. Please note:<br />Due to differences in CAD software, they will allow deviations up to 0.010"<br />outside of the original part envelope.<br />b. We will perform four separate finite element analyses on each geometry<br />using the loads described in the rules. We will use ANSYS, and we will<br />assume an isotropic linear-elastic material model with Young's Modulus = 110<br />GPa = 15,950 ksi and Poisson's Ratio = 0.31. The bolts, pin and mounting<br />surface will be treated as rigid bodies.<br />c. The maximum vonMises stress will be calculated; if this stress exceeds<br />the yield stress (903 MPa = 131 ksi) the entry will be disqualified.<br /></i>Joshua Stultshttps://www.blogger.com/profile/03506970399027046387noreply@blogger.comtag:blogger.com,1999:blog-5822805028291837738.post-87179806729619265352013-08-18T07:45:31.648-04:002013-08-18T07:45:31.648-04:00Topology optimization as a 'killer app' fo...Topology optimization as a 'killer app' for moving simulation sooner in the design process: <br /><i>While I’m actually a big fan of moving simulation up in the product development process, I don’t think any of today’s CFD or FEA programs are likely to be the killer-apps for upfront simulation. Rather, I think structural topology optimization might be it. If only more people knew what it was.<br /><br />The best way to understand topology optimization is to compare it to FEA. With FEA, you define the shape of a part, add loads and constraints, then run the simulation, to see if you got the shape right. With topology optimization, you define the loads and constraints, specify what space the part has to fit into, then, when you run the simulation, the software will tell you what shape the part should be in order to satisfy constraints like minimum weight or maximum stiffness. It is the opposite of FEA.</i><br /><a href="http://www.designworldonline.com/structural-topology-optimization-the-opposite-of-fea/" rel="nofollow">Structural Topology Optimization: the Opposite of FEA</a>Joshua Stultshttps://www.blogger.com/profile/03506970399027046387noreply@blogger.com