A multi-level analysis of skin/stiffener debonding is used to perform the design of fuselage of future aircraft during postbuckling. The “pyramid of test” approach is used both for experimental and numerical analysis (see Fig 1). The analysis begins with nonspecific element (NASA Specimens), then 7 point-bending tests are performed and the approach is finally validated on real panels of an on-g...

Stiffener layout optimization of complex surfaces is fulfilled within the framework topology optimization. A combined parameterization method developed in two aspects. One to parameterize material distribution stiffener by means B-spline. The other build mapping relationship from known 3D surface mesh thin-walled structure its parametric domain parameterization. influence upon discussed reveal ...

A vibration based damage identification method is investigated experimentally. The dynamic response of an intact and a locally damaged 16–layer unidirectional carbon fibre PEKK reinforced plate structure with two stiffener sections is considered. A forced–vibration set–up, including a laser vibrometer system, is employed to measure the dynamic behaviour. The feasibility of the two–dimensional M...

BACKGROUND Although it is rare for the fracture itself to become a life threatening injury in patients suffering from rib fracture, the lives of these patients are occasionally threatened by other associated injuries. Especially, early discovery of patients with rib fracture and intra-abdominal organ injury is extremely important to the prognosis. This study analyzed the link between rib fractu...

Hemangioma of the rib is an uncommon benign vascular tumour. A case of rib hemangioma in a 29-year-old woman is presented. Chest roentgenogram and computed tomography revealed a mass along the inner surface of the 7th left rib with bone destruction. She underwent resection of the 7th rib. The pathologic diagnosis was cavernous hemangioma. Hemangiomas of the rib are rare tumours but should be ke...

The development of a model-based approach for a damage severity assessment applied on a complex composite skin structure with stiffeners is presented in this paper. Earlier investigations on composite structures with stiffeners revealed that a vibration based structural health monitoring approach, employing the Modal Strain Energy Damage Index (MSE-DI) algorithm can detect and localise delamina...

VATER association is an exceptionally rare condition; however it is associated with multiple rib anomalies, which is one of its unique presentation. We are reporting a case of VATER associated with rib anomalies in various forms like bifid rib, ribbon rib and rudimentary rib.

This paper proposes a novel Lamb wave line sensing technique for crack detection in a welded stiffener. The proposed technique overcomes one of the biggest technical challenges of Lamb wave crack detection for real structure applications: crack-induced Lamb waves are often mixed with multiple reflections from complex waveguides. In particular, crack detection in a welded joint, one of the struc...

BACKGROUND First rib fractures are considered indicators of increased morbidity and mortality in major trauma. However, this has not been definitively proven. With an increased use of CT and the potential increase in detection of first rib fractures, re-evaluation of these injuries as a marker for life-threatening injuries is warranted. METHODS Patients sustaining rib fractures between Januar...