Laminations

This study focuses on experimental testing and subsequent numerical analysis of impacted and pre-loaded composite coupons and bonded composite scarf joints under varying impact conditions. A methodology will be developed for the numerical modelling of preloaded impact tests to enable capture of critical failure modes and ultimate failure. The main aim is to validate a modelling strategy that will provide accurate failure characterisation of the tested joints using numerical analysis.

185p runthenight05 01-03-2023 8 3   Download

The aim of this Master of Engineering (MEng) - Aerospace thesis is to study the structural response and failure of aerospace grade composites during exposure to fire. Key aspects of the research are to analyse the thermal and mechanical responses of laminates and sandwich composites in high temperature and fire environments, which result in softening and structural failure. The research is concentrated on carbon/epoxy laminates and sandwich composites, which are the most common composite materials used in aerospace structures.

209p runthenight05 01-03-2023 7 3   Download

Objectives of the thesis: The literature review on the behaviours of composite beams shows that Ritz method is efficient to analyse the behaviours of composite beams with various boundary conditions, however, the number of researches used this method is still limited.

203p monsterhunterer 20-06-2021 8 2   Download

Cutouts are commonly used as access port for mechanical and electrical structures. Most of the tructures generally work under severe dynamic loading and different constrained conditions during their service life. This may lead to vibration of the structure.

8p tohitohi 19-05-2020 15 4   Download

In this study, the impact response of glass/epoxy laminates interleaved by Polycaprolactone (PCL) nanofibers is considered. PCL is a thermoplastic polymer, which is a good choice for toughening epoxy-based composite. The impact tests were conducted on curved laminates and under 24 and 36J.

6p tohitohi 19-05-2020 23 1   Download

In the present study, the nonlinear forced vibration of symmetric laminated rectangular plates, including Glare fiber metal laminated rectangular plate, is investigated based on the first order shear deformation theory. The boundary condition is considered to be immovable simply support.

20p tohitohi 19-05-2020 20 2   Download

This work is devoted to the experimental study of a glass/polyester composite laminate under impact shock. Based on a thermodynamic approach, the objective is the evaluation of specific interlaminar delamination energy in a multi-layer composite material under impact loading causing damage to it by cracking.

10p tohitohi 19-05-2020 13 1   Download

Variation of the impact characteristics such as maximum contact load, maximum deflection, maximum contact time, absorbed energy are depicted in the figures. The results showed that PVDF nanofibers are not a good choice for toughening epoxy and improving impact damage resistance of GFRP.

6p tohitohi 19-05-2020 11 2   Download

In this study, this mode in cross-ply and angle-ply laminates has been investigated using a cohesive zone model. The advantage of this method is the possibility of modeling the delamination initiation and propagation without requirement to the presence of initial crack and remeshing.

18p tohitohi 19-05-2020 26 2   Download

Nhà sang trọng với nội thất bằng da .Bên cạnh dòng sản phẩm truyền thống như MFC, Melamine MDF hay công nghệ tấm Acrylic bóng gương..., chất liệu Laminate da vừa ra đời còn đánh dấu mốc mới trong lĩnh vực nội thất, giúp không gian sống sang trọng và phong cách hơn.

5p lephinoinhieu 17-08-2013 52 4   Download

Bên cạnh dòng sản phẩm truyền thống như MFC, Melamine MDF hay công nghệ tấm Acrylic bóng gương..., chất liệu Laminate da vừa ra đời còn đánh dấu mốc mới trong lĩnh vực nội thất, giúp không gian sống sang trọng và phong cách hơn. So với chất liệu khác, các sản phẩm làm từ da thật luôn mang đến sự sang trọng và đẳng cấp cho người sử dụng. Song chúng có giá thành khá cao và cần sự cẩn trọng trong quá trình sử dụng để da luôn bóng đẹp. ...

4p sun123123 07-07-2013 86 3   Download

Binding of lamin B receptor (LBR) to chromatin was studied by means of an in vitro assay system involving recombinant fragments of human LBR and Xenopus sperm chromatin. Glutathione-S-transferase (GST)-fused proteins including LBR fragments containing the N-terminal region (residues 1–53) and arginine-serine repeat-containing region (residues 54–89) bound to chromatin. The binding of GST-fusion proteins incorporating the N-terminal and arginine-serine repeat-containing regions to chromatin was suppressed by mild trypsinization of the chromatin and by pretreatment with a DNA solution....

11p research12 01-06-2013 29 4   Download

Biosynthesis of cholesterol represents one of the funda-mental cellular metabolic processes. SterolD14-reductase (D14-SR) is a microsomal enzyme involved in the con-version of lanosterol to cholesterol in mammals. Amino-acid sequence analysis of a 38-kDa protein puri®ed from bovine liver in our laboratory revealed 90% similarity with a human sterol reductase, SR-1, encoded by the TM7SF2gene, and with the C-terminal domain of human lamin B receptor.

8p research12 29-04-2013 38 3   Download

Loss of functional emerin, a nuclear membrane protein, causes X-linked recessive Emery–Dreifuss muscular dystro-phy. In a yeast two-hybrid screen, we found that emerin interacts with Btf, a death-promoting transcriptional repressor, which is expressedat high levels in skeletalmuscle. Biochemical analysis showed that emerin binds Btf with an equilibriumaffinity (KD)of100 nM. Using a collection of 21 clustered alanine-substitution mutations in emerin, the resi-dues required for binding to Btf mapped to two regions of emerin that flank its lamin-binding domain. ...

11p dell39 03-04-2013 28 4   Download

The abundant metabolitemyo-inositol hexakisphosphate (InsP6) can form vesicular deposits with cations, a widespread phenomenon in plants also found in the cestode parasite, Echinococcus granulosus. In this organism, the deposits are exocytosed, accumulating in a host-exposed sheath of extracellular matrix termed the laminated layer.

12p inspiron33 25-03-2013 28 2   Download

Lamins are major structural components of the nuclear envelope in multi-cellular eukaryotes. Particularly A-type lamins are also located in the nucleoplasm, likely involving a specific binding partner, lamina-associated polypeptide 2a (LAP2a). LAP2a–lamins A⁄C complexes in the nucleo-plasm have been implicated in the regulation of gene expression by various means.

12p galaxyss3 21-03-2013 35 2   Download

The inner face of the nuclear envelope of metazoan cells is covered by a thin lamina consisting of a one-layered network of intermediate filaments inter-connecting with a complex set of transmembrane proteins and chromatin associating factors. The constituent proteins, the lamins, have recently gained tremendous recognition, because mutations in the lamin A gene,

8p galaxyss3 21-03-2013 32 3   Download

Tm7sf2gene encodes 3b-hydroxysterol D 14 -reductase (C14SR, DHCR14), an endoplasmic reticulum enzyme acting onD 14 -unsaturated sterol interme-diates during the conversion of lanosterol to cholesterol. The C-terminal domain of lamin B receptor, a protein of the inner nuclear membrane mainly involved in heterochromatin organization, also possesses sterol D 14 -reductase activity.

14p vinaphone15 28-02-2013 37 4   Download

Human MOK2 is a DNA-binding transcriptional repressor. Previously, we identified nuclear lamin A⁄C proteins as protein partners of hsMOK2. Fur-thermore, we found that a fraction of hsMOK2 protein was associated with the nuclear matrix. We therefore suggested that hsMOK2 interactions with lamin A⁄C and the nuclear matrix may be important for its ability to repress transcription.

11p viettel02 22-02-2013 45 2   Download

R´sum´ anglais e e For a hyperbolic metric on a 3-dimensional manifold, the boundary of its convex core is a surface which is almost everywhere totally geodesic, but which is bent along a family of disjoint geodesics. The locus and intensity of this bending is described by a measured geodesic lamination, which is a topological object.

44p tuanloccuoi 04-01-2013 44 6   Download