Aerospace and automotive industries are some of the industrial sectors that are attracted to structural health monitoring (SHM) systems. An SHM system should be: (1) integrated from the beginning of the structural design, (2) reliable, (3) light-weight and (4) able to inspect critical parts that are not easily accessible. Additive manufacturing (AM) is receiving momentum during the last years from many industrial sectors. The increase in design freedom offered by AM can be used in order to develop lightweight and complex structures. Typically these structures cannot be easily produced by subtractive conventional methods. We developed a novel approach for SHM systems. Our approach is based on fusing the aforementioned technologies – SHM and AM. Our novel approach is called the effective Structural Health Monitoring (eSHM) system. The eSHM system detects cracks in a structure by means of an integrated network of pressurised capillaries. The latter is integrated into a metallic structure which is produced by AM. For benchmarking, in traditional specimens (not produced by AM), the capillary can be machined. The current system has proven its effectiveness. The main objective of this work is to investigate the fatigue response of structures with an integrated eSHM system and the effectiveness of the eSHM system. The reliability of the eSHM system is evaluated during four-point bending fatigue tests. In the framework of this investigation specimens with integrated capillaries produced by AM and conventional material are tested with respect to the eSHM system. Furthermore, an optimization of various capillaries’ locations is also taking place. Heat treated conditions and autofrettaged conditions of samples are compared with conventional samples. It is concluded that an integrated eSHM system can be included on the initial design of an AM structure with promising results. The current system does not jeopardize the structural integrity of a structure while it enables one of the main challenges for SHM systems – SHM integration into the structure from the initial design.
|Title of host publication||EWSHM-8th European Workshop on Structural Health Monitoring, 2016|
|Number of pages||9|
|Publication status||Published - Jul 2016|
|Event||8th European Workshop on Structural Health Monitoring - Bilbao, Spain|
Duration: 5 Jul 2016 → 8 Jul 2016
|Workshop||8th European Workshop on Structural Health Monitoring|
|Period||5/07/16 → 8/07/16|