An approach for designing the compliant adaptive wing leading edge with composite material is proposed based on topology optimization. Firstly, an equivalent constitutive relationship of laminated glass fiber reinforced epoxy plates has been built symmetric plate theory. Then, optimization objective function was used to minimize least square error (LSE) between deformed curve and desired aerodynamics shape. After that, structures different ply-orientations were obtained by using solid...

The morphing trailing edge based compliant mechanism is a developing technology which can increase lift-drag ratio for variable flight modes by bending down the edge. Composite material design integrated into topology optimization in paper. A two-step strategy established to solve problem. Initially, lamination parameters are introduced and viewed as bridge between structure stiffness fiber angles composite material. Design variables include element density. least-squares actual desired...

An approach for designing compliant mechanisms with curvilinear fiber path laminated composites is presented to obtain the optimum topology structure in this paper. A plate built by using shifted method. Meanwhile, an equivalent constitutive relationship of has been obtained based on theory. Taking element relative density as design variable, minimizing weighted linear combination mutual strain energy and considered objective function achieve desired deformation enough load-carrying capacity...

An approach for designing compliant mechanisms with glass fiber-reinforced epoxy materials is presented to obtain the optimum fiber orientation and topology structure simultaneously in this paper. Four-node hybrid stress elements nodal design variables are adopted suppress islands checkerboard phenomenon without additive filter technology constraint. Taking relative density as variables, minimizing weighted linear combination of mutual strain energy considered objective function achieve...

A topology optimization, based on a coupling method of finite element and meshless method, is proposed for continuum structure. reasonable arrangement the domain can guarantee accuracy methods meanwhile keep computational efficiency method. Besides, as adopted, displacement boundary conditions are applied to elements nodes by standard dual-level density approximant carried out approximate interpolate unified continuous field. An unstable phenomenon observed in interface domain, leading...

A morphing leading edge, based on the compliant mechanism, is a novel concept which can improve aerodynamic performance of aircraft for different missions. This obviously reduce weight and enhance aircraft’s fuel efficiency. simultaneous optimization topology fiber orientations composite edge has been achieved in paper. It mainly included two steps. Initially, lamination parameters density were taken as design variables to determinate angles topology, respectively. The least squares between...

The change of an external environment leads to the defocusing phenomenon space optical remote sensor. performance focusing mechanism is related image quality It was optimized for a novel comprised flexural hinge lever-type amplifier and several piezoelectric ceramics improve on high loads large stroke in this research. has advantages lightweight, simple structure reliability compared with traditional mechanism. input displacement from actuators amplified by two-stage flexure Dimensional...

A design approach for compliant mechanisms with straight fiber laminate is presented to obtain the optimal orientations and topology structure simultaneously in this paper. Firstly, an equivalent constitutive relation of parameterized terms lamination parameters. Taking parameters relative density as variables, minimizing weighted linear combination mutual strain energy (MSE) (SE) considered objective function achieve desired deformation enough load carrying capacity volume constraint. The...

Thermal radiation and vacuum lead to the deformation of bearing cylinder with carbon fiber composites which generates defocus phenomenon for space optical camera. As heavier weight higher complexity rigid focusing mechanism camera, a novel compliant lighter simple structure was designed tested in this paper. In order achieve stroke range ensure image quality mechanism, micro driving displacement from piezoelectric ceramics amplified by two-stage flexible hinge lever-type mechanism. Taking...

The fracture morphology and fatigue life of pre-corroded 7050 aluminium alloys were studied under constant block amplitude loading. It was found that the pits depth/radius ratio is mainly distributed between 0·05 20 after 12 hours corrosion. A thermal infrared imager used to monitor surface temperature sheet specimen during tests, which showed an increase 0·7–1°C. This stage took up a small proportion overall cycle. corrosion modified equivalent initial flaw size model applied back-calculate...

By means of shot peening treatment, a nanostructured surface layer was formed on aluminium alloy 7050. Group contrastive pre-corrosion damage tests, under 6, 12, 24, 48 and 72-hour corrosion time levels, were carried out in 7050 after treatment with the intensity 0·006A 0·008A. After damage, residual strength tests out. The morphology analysed using optical microscope. experimental data by mathematical statistics method, influence mechanism properties affected also researched. decreases...

In order to reduce the mechanical properties and curing residual stress of thick composite caused by excessive temperature peak during process, a multi-objective optimization model based on multi-physics coupling characteristics was developed maximum time. Firstly, three-dimensional which incorporated three typical sub-models including thermo-chemical model, resin viscosity flow established investigate development thickness laminate process. The results numerical were compared with...