ADVANCED MATERIALS & PROCESSES | OCTOBER 2023 39 FEATURE 7 solid geometry of the part in the STEP file format to ISO 10303 with model-based definitions (MBDs) as shown in Fig. 2. Second, the transformation control frame (TCF) defines the rules of transformation between shape states (Fig. 3). Third, the bill of transformations (BoT) schedules the intended sequence of all TCFs to fully describe the part’s shape transformation between all four shape states S1 through S4 as shown in (Fig. 4). CALL FOR CONTRIBUTIONS This proposed new standard will be used within technical product documentation (TPD), geometric product specification (GPS) and engineering drawings within British standard BS 8888 that defines the requirements for Fig. 4 — Bill of transformations. technical specification of products. The authors are seeking to receive industrial input, expert feedback, as well as use cases that could be used in the standards document. Contributions to these use cases would aid illustrating how the proposed standard can be used and to study its relation to existing well-established workflows. Interested parties, including designers, test engineers, and metrologists working with parts involving shape transformations where the proposed standard could be applied may contact the authors for further information. ~SMST For more information: Eujin Pei, Brunel University London, eujin.pei@brunel.ac.uk; Christopher Leung, University College London, christopher.leung@ucl.ac.uk.
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