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Predicting the Future of Additive Manufacturing: SwRI’s Pioneering Project with DARPA

April 7, 2025 By admin Leave a Comment

Southwest Research Institute (SwRI) has embarked on a groundbreaking two-year initiative funded by a $3.2 million contract from the Defense Advanced Research Projects Agency (DARPA), designed to transform how the structural integrity and lifespan of components made through additive manufacturing (AM) are assessed. The project, named OPAL (“One Part And Life”), aims to revolutionize the way manufacturers predict the durability of complex metal parts built layer-by-layer through sophisticated computer-controlled processes. While AM technologies offer significant design flexibility and efficiency by consolidating multiple parts into a single intricate component, the inherent variability in material properties has limited widespread adoption, particularly in industries where strict quality control standards are paramount, such as aerospace, medical, and advanced manufacturing.

The critical challenge addressed by SwRI’s research lies in the unpredictable nature of anomalies and microstructural defects found in AM-produced metal alloys, which differ considerably from traditionally forged or wrought alloys. These defects, often microscopic, can dramatically affect the part’s structural integrity and its overall lifespan. Currently, manufacturers rely heavily on statistical techniques and large datasets to estimate the minimum lifespan of AM parts, leading to conservative assessments that often result in the premature retirement of perfectly viable components. Dr. James Sobotka, Lead Engineer for SwRI, explains that this conservative approach has historically caused significant waste, with parts frequently discarded after utilizing only a fraction of their true lifespan.

To overcome these limitations, SwRI is enhancing its own DARWIN® software—a recognized commercial tool for fracture mechanics and reliability analysis. DARWIN’s advanced capabilities allow engineers to model and assess damage tolerance in metallic structures, making it a natural fit for OPAL’s ambitious objectives. Under OPAL, the DARWIN software will be expanded to incorporate real-time data collected directly from the additive manufacturing process. Using cutting-edge sensors, the team will capture detailed measurements including temperature fluctuations, spectral data from emitted light, and other critical manufacturing parameters. This unprecedented level of monitoring enables the creation of precise 3D maps depicting internal microstructural arrangements and defects within each part produced.

The integration of these detailed defect maps and microstructural analyses into DARWIN will enable a highly accurate, risk-informed prediction of each individual part’s lifespan. By assessing the specific influence of defect location, size, and microstructural nuances on fatigue crack growth rates, SwRI’s new methodology moves beyond the broad, statistical generalizations currently employed. As a result, manufacturers will gain the confidence to exploit more of a component’s actual lifespan, significantly reducing waste and lowering production costs, while simultaneously boosting reliability and safety standards.

SwRI’s OPAL project, selected as part of DARPA’s broader SURGE initiative (Structures Uniquely Resolved to Guarantee Endurance), signals a paradigm shift in how manufacturers approach component qualification and lifespan estimation. Rather than relying on conservative, broadly-applied statistical standards, manufacturers will soon have detailed insight into the structural health of each individual component as it leaves the AM machine. According to Dr. Sobotka, this innovative leap forward is set to unlock immense potential, enabling manufacturers to fully capitalize on additive manufacturing’s inherent advantages—ushering in an era of smarter, more cost-effective, and resource-efficient manufacturing.

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