TY - GEN
T1 - Stress relief in contact-aided cellular compliant mechanisms
AU - Mehta, Vipul
AU - Frecker, Mary
AU - Lesieutre, George
PY - 2008
Y1 - 2008
N2 - Cellular structures with an internal contact-mechanism are investigated. These contact-aided compliant mechanisms are shown to reduce the local tensile stresses, thereby providing additional global strain before yielding or fracture failure compared to honeycomb or auxetic cellular structures. An analytical model for such structures is developed and it is validated using FEA simulations. Two different materials are considered for comparison. More than 100% improvement in global strain capability is possible using the contact. A high-strain morphing aircraft skin is examined as an application of these mechanisms. The contact-aided cellular compliant mechanisms are more advantageous in terms of both the structural mass as well as the global strain compared to a non-contact design. In the application considered the stress-relief mechanism increased the global strain capability by as high as 37%.
AB - Cellular structures with an internal contact-mechanism are investigated. These contact-aided compliant mechanisms are shown to reduce the local tensile stresses, thereby providing additional global strain before yielding or fracture failure compared to honeycomb or auxetic cellular structures. An analytical model for such structures is developed and it is validated using FEA simulations. Two different materials are considered for comparison. More than 100% improvement in global strain capability is possible using the contact. A high-strain morphing aircraft skin is examined as an application of these mechanisms. The contact-aided cellular compliant mechanisms are more advantageous in terms of both the structural mass as well as the global strain compared to a non-contact design. In the application considered the stress-relief mechanism increased the global strain capability by as high as 37%.
UR - http://www.scopus.com/inward/record.url?scp=78149365742&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=78149365742&partnerID=8YFLogxK
U2 - 10.1115/SMASIS2008-431
DO - 10.1115/SMASIS2008-431
M3 - Conference contribution
AN - SCOPUS:78149365742
SN - 9780791843314
T3 - Proceedings of the ASME Conference on Smart Materials, Adaptive Structures and Intelligent Systems, SMASIS2008
SP - 665
EP - 675
BT - Proceedings of the ASME Conference on Smart Materials, Adaptive Structures and Intelligent Systems, SMASIS2008
T2 - ASME Conference on Smart Materials, Adaptive Structures and Intelligent Systems, SMASIS2008
Y2 - 28 October 2008 through 30 October 2008
ER -