About this Abstract |
| Meeting |
MS&T26: Materials Science & Technology
|
| Symposium
|
Additive Manufacturing: Equipment, Instrumentation and In-Situ Process Monitoring
|
| Presentation Title |
Self-Sensing of 3D-Printed Materials by Measuring the Inductance, Resistance and Capacitance |
| Author(s) |
Deborah D.L. Chung |
| On-Site Speaker (Planned) |
Deborah D.L. Chung |
| Abstract Scope |
Self-sensing refers to sensing using the build as the sensor of its own condition, without sensor incorporation. It is achieved by electrical measurement on the build. Inductance-based and resistance-based self-sensing are effective for conductive materials, such as metals and conductor-filled polymers. Capacitance-based self-sensing is effective for non-conductors, such as unfilled polymers. The defects sensed include artificial subtle interlayer defects. The infill angle is also sensed. The inductance is more sensitive than the resistance, due to greater sensitivity of the inductance to current path tortuosity. Both defects and infill angle enhance the tortuosity. For continuous carbon fiber polymer-matrix composites, the contact resistivity of the interlaminar interface is sensitive to the damage (which tends to start at this interface), stress and temperature. The capacitance is sensitive to defects due to the intersection of the defects with the electric field lines emanating from coplanar electrodes. Sensitivity is also shown for the defect position. |
