Chapter 10 Thermoforming processes for knitted-fabric-reinforced thermoplastics: New manufacturing techniques for load-bearing, anisotropic implants

1997 ◽  
pp. 403-440 ◽  
Author(s):  
J. Mayer ◽  
E. Wintermantel
Keyword(s):  
Knitted Fabric ◽  
Load Bearing ◽  
Manufacturing Techniques ◽  
Reinforced Thermoplastics

Reinforced thermoplastic fasteners

2021 ◽  
pp. 135-148
Author(s):  
А.В. Чесноков ◽  
В.Н. Андреев ◽  
И.А. Тимофеев
Keyword(s):  
Tensile Strength ◽  
Truss Structures ◽  
Load Bearing ◽  
Domestic Production ◽  
Aerospace Technology ◽  
Reinforced Thermoplastics

Обоснована актуальность применения армированных термопластов для изготовления крепежа для аэрокосмической техники. Разработана технология получения крепежа для соединения трехслойных панелей из угленаполненного (40%) полиэфирэфиркетона импортного и отечественного производства. Проведены исследования полученного крепежа. Полученные результаты применены в разработке технологии изготовления крепежа для несущих ферменных конструкций поддерживающих кабельную разводку на космических аппаратах. Средняя удельная прочность крепежа на разрыв составляет 115 МПа·см/г, что определяет перспективность применения его в конструкциях аэрокосмической техники. На крепеж получены Технические условия «Детали крепежные армированные». The relevance of the use of reinforced thermoplastics for the manufacture of fasteners for aerospace equipment is substantiated. A technology has been developed for obtaining fasteners for joining three-layer panels made of carbon-filled (40%) polyetheretherketone of foreign and domestic production. The research of the received fasteners has been carried out. The results obtained are used in the development of a technology for the manufacture of fasteners for load-bearing truss structures that support cabling on spacecraft. The average specific tensile strength of the fastener is 115 MPa cm/g, which determines the prospects of its application in the structures of aerospace technology. The technical conditions «Reinforced fastening parts» were received for the fasteners.

Optimization of Lattice Infill Distribution in Additive Manufacturing

2017 ◽  
Author(s):  
Francesco Campagna ◽  
Alejandro R. Diaz
Keyword(s):  
Topology Optimization ◽  
Additive Manufacturing ◽  
Effective Properties ◽  
Solid Material ◽  
Structural Stiffness ◽  
Optimization Scheme ◽  
Load Bearing ◽  
Manufacturing Techniques

A technique is presented to optimize the distribution of the lattice infill in regions inside load bearing structures manufactured using additive manufacturing techniques. Internal boundaries of solid material separate regions of infill of the same microstructural scale. This scale may vary from region to region in the domain. The goal is to find distributions that maximize structural stiffness. The method is based on a topology optimization scheme to position internal boundaries separating infill regions, and relies on effective properties of known lattice topologies. An example illustrates every step of the procedure. Only extruded shapes (2 ½ D) are considered.

scholarly journals Roboticizing fabric by integrating functional fibers

2020 ◽  
Vol 117 (41) ◽  
pp. 25360-25369
Author(s):  
Trevor L. Buckner ◽  
R. Adam Bilodeau ◽  
Sang Yup Kim ◽  
Rebecca Kramer-Bottiglio
Keyword(s):  
Closed Loop ◽  
Variable Stiffness ◽  
Closed Loop Control ◽  
Load Bearing ◽  
Loop Control ◽  
Textile Manufacturing ◽  
Deployable Structure ◽  
Recent Emergence ◽  
Manufacturing Techniques

Fabrics are ubiquitous materials that have conventionally been passive assemblies of interlacing, inactive fibers. However, the recent emergence of active fibers with actuation, sensing, and structural capabilities provides the opportunity to impart robotic function into fabric substrates. Here we present an implementation of robotic fabrics by integrating functional fibers into conventional fabrics using typical textile manufacturing techniques. We introduce a set of actuating and variable-stiffness fibers, as well as printable in-fabric sensors, which allows for robotic closed-loop control of everyday fabrics while remaining lightweight and maintaining breathability. Finally, we demonstrate the utility of robotic fabrics through their application to an active wearable tourniquet, a transforming and load-bearing deployable structure, and an untethered, self-stowing airfoil.

Load-Bearing in the Ovine Medial Tibial Condyle: Effect of Meniscectomy

1993 ◽  
Vol 06 (02) ◽  
pp. 100-104 ◽  
Author(s):  
D. M. Pickles ◽  
C. R. Bellenger
Keyword(s):  
Knee Joint ◽  
Contact Area ◽  
Mammalian Species ◽  
Total Removal ◽  
Load Bearing ◽  
Human Knee ◽  
Biochemical Effects ◽  
Pressure Sensitive ◽  
Medial Meniscectomy ◽  
Tibial Condyle

SummaryTotal removal of a knee joint meniscus is followed by osteoarthritis in many mammalian species. Altered load-bearing has been observed in the human knee following meniscectomy but less is known about biochemical effects of meniscectomy in other species. Using pressure sensitive paper in sheep knee (stifle) joints it was found that, for comparable loads, the load-bearing area on the medial tibial condyle was significantly reduced following medial meniscectomy. Also, for loads of between 50 N and 500 N applied to the whole joint, the slope of the regression of contact area against load was much smaller. Following medial meniscectomy, the ability to increase contact area as load increased was markedly reduced.The load bearing area on the medial tibial condyle was reduced following meniscectomy.

A Comparative Study of Offsite Construction Manufacturing Techniques

2020 ◽  
Author(s):  
Chelsea Ritter ◽  
Beda Barkokebas ◽  
Youyi Zhang ◽  
Mohamed Al-Hussein
Keyword(s):  
Comparative Study ◽  
Manufacturing Techniques
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