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Modelling the damage formation of bolted carbon fiber reinforced epoxy composite joints at increasing strain rates için kapak resmi
Modelling the damage formation of bolted carbon fiber reinforced epoxy composite joints at increasing strain rates
Başlık:
Modelling the damage formation of bolted carbon fiber reinforced epoxy composite joints at increasing strain rates
Yazar:
Albir, Çağatay, author.
Yazar Ek Girişi:
Fiziksel Tanımlama:
xii, 65 leaves: color illustrarions, charts;+ 1 computer laser optical disc.
Özet:
The bearing strength of a carbon fiber reinforced/epoxy unidirectional composite joint incorporating a single hex bolt fastener was investigated under quasi-static and dynamic loads experimentally and numerically with two different bolt torques, 2.5 N m and 10 N m. The tests were conducted with neat fit clearance and without washer. The quasi-static tests were conducted at 3.33x10-5 and 1.66 x10-3 m s-1 according to the ASTM D5961 Procedure C. The dynamic tests were conducted in at Tension Split Hopkinson Pressure Bar (TSHPB) at 12.68 m s-1 using a specially designed specimen grip to ensure the same conditions as the quasi-static tests. Three dimensional explicit finite element models of bearing tests were developed in the LS-DYNA and the composite was modelled using the MAT_162 composite material model incorporating the strain rate effects. At the quasi-static velocities, a relatively low strain rate dependence of bearing peak force was found with almost no effect of applied bolt torque. In the TSHPB tests, the bearing force increased by 57% of those of quasi-static tests. The deformation mode also altered in dynamic tests and the increase of the bolt torque resulted with increasing the bearing peak force by 5%.
Yazar Ek Girişi:
Tek Biçim Eser Adı:
Thesis (Master)--İzmir Institute of Technology:Mechanical Engineering.

İzmir Institute of Technology: Mechanical Engineering --Thesis (Master).
Elektronik Erişim:
Access to Electronic Versiyon.
Ayırtma: Copies: