Covers advancements in spacecraft and tactical strategic missile systems, including subsystem design application, mission analysis, materials structures, developments space sciences, processing manufacturing, operations, applications of technologies to other fields.

An experimental and numerical study of the dynamic deployment stored strain energy deployable booms with tape-spring hinges made woven carbon fiber composite is presented. The consists three phases: deployment, one or more attempts to latch, a small amplitude vibration. Twelve nominally identical experiments show that vibration phases are repeatable, whereas considerable scatter observed during latching. A high-fidelity finite element shell model complete boom used carry out simulations...

Recently developed analysis techniques for thin shells that can be folded elastically and are able to self-deploy used develop an iterative design approach this type of structure. The proposed considers a series potential designs then evaluates, each trial design, key performance parameters through complete simulation its folding deployment behavior. This is applied boom concept consisting thin-walled tube in which two tape-spring hinges made by cutting diametrically opposite slots; the...

Abstract We present a combined experimental and analytical approach to study the formation of creases in tightly folded Kapton polyimide films. In experiments, we have developed robust procedure create with repeatable residual fold angle by compressing initially bent coupons. then use it explore influence different control parameters, such as force applied, time film is being pressed. The results are compared simplified one-dimensional elastica model, well high fidelity finite element model;...

We present an experimentally based failure criterion for symmetric two-ply plain-weave laminates of carbon fiber reinforced plastic. The is formulated in terms six force and moment stress resultants consists a set three inequalities, related to in-plane, bending, combined in-plane bending types failure. All parameters the are measured directly from five sets tests. new validated against extensive data test results that use novel sample configurations impose different combinations resultants....

A dual-matrix composite boom is proposed as a way of realizing deployable closed cross-section that stiff, lightweight, and can be packaged in small volumes.Little work exists studying the folding deployment behavior made shells this paper addresses by investigating for two designs.Experimental techniques measuring folded shape curved undergoing large deformations presented.Furthermore, experimental measurements moment-rotation response booms are discussed.A study using commercially...

This paper presents a detailed study of the folding and deployment slotted tube hinge made from two-ply laminate carbon-fibre reinforced plastic. A physical model particular version this binge has been used to carry out quasi-static tests process fully captured through finite element simulation. The first stage in simulation was generate folded, strained configuration hinge. second gradually decrease relative rotation between ends until it became zero. By analysing in-plane strains...

This paper considers a lightweight boom with an integral hinge consisting of thinwalled tube made carbon fibre reinforced plastic two longitudinal slots.The dynamic deployment this is studied both experimentally and by means detailed finite-element simulations.The the can be divided into three phases: deployment; incomplete latching, buckling tape springs large rotation boom; vibration in latched configuration.The simulations show that most critical phase second one, as highest strains...

The suction caisson has been identified as a viable foundation option to jacket-supported offshore wind turbines. This is especially the case in situations where there shallow but strong bedrock, and too deep consider drilled pile solution an economic option. Over last few years, significant advances design understanding of caissons have developed. However, much less done on reducing installation risk. paper outlines investigation into use two-way pressure cycling during means diminishing...

Topology optimization is the tool of choice for obtaining initial design structural components. The resulting optimal from topology will be input subsequent optimizations with regard to shape, size, and layout. In reality, however, iterative solvers used in conventional SIMP (Simplified Isotropic Material Penalization) based schemes consume a very high computational power therefore act as bottleneck manufacturing process. this work, an accelerated technique on deep learning presented....

Ultra-thin woven fibre composites are becoming popular in weight sensitive applications and hence it is important to predict their mechanical properties for design improvements. This paper presents a simple homogenized micro-mechanical modelling technique with solid elements predicting of the thin composites. A representative unit cell has been generated using finite element pre-processor, TexGen an elliptical cross-sectioned yarn then idealized behave according Kirchhoff - Love plate...