CompositesWorld
Issue link: https://cw.epubxp.com/i/632301
11 CompositesWorld.com A similar approach can be used for strength design, using either trace- normalized master strain-stress templates, which defne the uniaxial tensile and compressive strain failures or by adoption of the OMNI or the Unit Circle Failure envelopes for all common ply angles laminates. Based on profes- sor's Tsai and D. Melo's work, strength envelopes for these laminates could converge to one interactive Unit Circle Failure criterion, which allows further simplifcation in the approach to the strength prediction. Te adoption of an idealized single-value construction makes the results, either represented by failure index or strength ratios, scalable. Tis is very powerful and allows adoption of very ef- cient optimization routines, such as Direct Weight and Layup Rate methods in composite design workfows as described by Professor Tsai. In practical applications using CompoSIDE and the Trace- based design scaling model, engineers can evaluate a frst-design candidate based on the generalized response and applying Trace Trace-based Design & Testing to understand not only if there is a possible failure, but also how far, or how close, the material is to the failure point. Tis addi- tional information is extremely valuable and adds a new dimen- sion to the design phase, allowing much simpler optimization: We are able to obtain qualitative and quantitative data to guide us in the design process and facilitate product development even in an early stage of the development. As part of the development and design process, Trace-based design elements also can be applied to material and components FIG. 2 Time and cost down, productivity up In this chart, the scale on the left indicates percent- ages while the scale on the right indicates the number of hours consumed in traditional analysis and develop- ment of a part or product. Source | CompoSIDE Ltd. CompoSIDE & Trace Impact on Product Development CompoSIDE + Trace 100 50 0 200 150 100 50 0 Traditional Incremental Developments CompoSIDE Design Analysis Material Productivity Characterisation