Advances in the Bonded Composite Repair o f Metallic Aircraft Structure phần 2 potx

... Keeping void contents low is a matter of recognising the origins of the voids and ensuring that appropriate procedures are used. If the 64 Advances in the bonded composite repair of metallic aircraft ... for the composite are for through-thickness deformation, (c) critical strain refers to failing strain for the composites and yield strain for the metals, (d)...

Ngày tải lên: 08/08/2014, 11:21

... method 10.4. 10.5. 10.6. xvii 21 2 21 5 22 7 22 9 23 I 23 3 23 6 23 8 24 0 24 1 24 2 24 3 24 5 25 1 25 6 25 8 26 2 26 4 26 6 26 9 26 9 27 0 27 1 27 1 27 2 27 2 27 3 27 4 27 5 27 6 27 7 ... determine the economic life of the airframe. Unfortunately, management of corrosion by the setting of inspection intervals is not always effective since the l...

Ngày tải lên: 08/08/2014, 11:21

... Advances in the bonded composite repair of metallic aircraft structure 4.5.4. Fickean diffusion coeflcients for moisture absorption Althof [24 ] gives the following data for the diffusion coefficients ... The adhesive to metal or composite interface 0 The adhesive to primer interface 0 The surface matrix resin of the composite 0 The near-surface p...

Ngày tải lên: 08/08/2014, 11:21

... practice, however, structures to be reinforced may be finite in size or constrained by the surrounding structure. To quantify the effect of this constraint, consider the configuration shown in Figure ... first-order solution ignoring the load attraction effect of composite 178 Advances in the bonded composite repair of metallic aircraft structure by new...

Ngày tải lên: 08/08/2014, 11:21

... to design several complex repair schemes, such as the repair of fatigue cracks in the lower skin of Mirage aircraft [2] , and cracks on the upper surface of the wing pivot fitting of FlllC aircraft ... consider the effect that the difference between the coefficients of thermal expansion of the boron patch and the aluminium alloy wing skin has on the residual str...

Ngày tải lên: 08/08/2014, 11:21

... tt-' is the height for step k. 28 0 Advances in the bonded composite repair of metallic aircraft structure Table 10.1 Geometric details for patch on one side of plate for non- uniform ... function by transferring some portion of the load from the reinforced component through the adhesive bond layer, thereby reducing the range and mean of the cycl...

Ngày tải lên: 08/08/2014, 11:21

... (referring to Chapter 13 for more details). In the following, we will focus our attention on the influence of thermal residual stress only. For an orthotropic composite patch bonded to an isotropic ... stresses. In a bonded joint in which two materials are bonded together, thermal stresses may develop as a result of the difference in thermal coefficients of expan...

Ngày tải lên: 08/08/2014, 11:21

... DERA research on bonded composite patch repair of aluminium alloy structures; it contains nine main sections covering repair of thin skin components, repair of thick sections, gr/ep versus ... either from a static calibration or in flight. (d) From a knowledge of the external aerodynamic loads and the availability of a full F- E model of the aircraft and local regi...

Ngày tải lên: 08/08/2014, 11:21

... Advances in the bonded composite repair of metallic uircraft structure Following the development of a bonded- composite repair for MSD in the fuselage lap-joint of wide bodied transport aircraft ... is done for the purpose of increasing the fatigue life of the joint. In service, environmental degradation may cause this bond to become ineffective,...

Ngày tải lên: 08/08/2014, 11:21

... assessment of bonded composite doubler repairs 491 Application of impact damage to composite coupons Following the composite doubler installation and prior to environmental conditioning, ... bonded composite repair of metallic aircraft structure 21 . Roach, D.P. (20 01). Commercial application of composite doublers for DC-IO fuselage repairs, Int’l. SAMPE...

Ngày tải lên: 08/08/2014, 11:21