Laminations

In the present paper, by using the higher-order shear deformation theory and the strain-displacement relationships of large deflection, the postbuckling analysis of the functionally graded graphene-reinforced composite laminated (FG-GRCL) parabola, sinusoidal, and cylindrical externally pressured panels is presented in detail.

10p viengfa 28-10-2024 2 1   Download

This study introduces a novel Ritz approximation function to analyze the free vibrations of laminated composite shallow curved beams. The methodology utilizes polynomial functions-based Fibonacci series to develop the Ritz’s approximation function. The displacement field aligns with the high-order shear deformation theory designed explicitly for shallow curved beams.

18p viyoko 01-10-2024 5 1   Download

In this paper, an improved version of Differential Evolution algorithm, called iDE, is introduced to solve design optimization problems of composite laminated beams. The beams used in this research are Timoshenko beam models computed based on analytical formula.

11p vifilm 24-09-2024 9 1   Download

In this paper the smoothed four-node element with in-plane rotations MISQ24 is combined with a C0-type higher-order shear deformation theory (C0 -HSDT) to propose an improved linear quadrilateral plate element for static and free vibration analyses of laminated composite plates.

12p vifilm 24-09-2024 3 1   Download

Bài viết Đặc điểm phân bố ứng suất trong tấm composite lớp gia cường ống nano carbon đơn vách nghiên cứu đặc điểm phân bố của các thành phần ứng suất theo chiều dày của tấm composite lớp gia cường ống carbon đơn vách (laminated functionally graded single-walled carbon nanotubes reinforced composite plates: FG-CNTRC). Ống carbon gia cường phân bố trong từng lớp theo bốn quy luật: đều (UD), dạng chữ V (FG-V), dạng chữ O (FG-O) và dạng chữ X (FG-X).

12p viironman 02-06-2023 8 4   Download

In this paper, the formulas for plate deformation as transverse and longitudinal shrinkages as well as vertical deflection produced by induction triangle heating are formed based on eigenstrain concept using laminated plate theory to consider some cuboidal inclusions with eigeinstrain.

12p vidoctorstrange 06-05-2023 5 2   Download

Nghiên cứu này đã xác định được thông số công nghệ (cấu trúc xếp lớp, lượng keo tráng và chế độ ép) tạo ván LVL (Laminated veneer lumber) từ ván bóc của các loài cây Keo tai tượng (Acacia mangium Willd.), Bạch đàn Uro (Eucalyptus urophylla), Mỡ (Manglietia conifera Dandy) và Thông Caribê (Pinus caribaea Morelet) làm nguyên liệu cho gỗ khối.

9p vipettigrew 21-03-2023 13 5   Download

Bài viết Mô hình hóa dầm gỗ liên hợp hiện đại bằng phần tử hữu hạn giới thiệu một mô hình số bằng phần tử hữu hạn, cho phép mô tả ứng xử cơ học tổng thể của dầm Glued Laminated Timber, bao gồm ứng xử cơ học của liên kết mộng răng lược, liên kết keo dán và của gỗ.

3p vipettigrew 15-03-2023 8 2   Download

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 7 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

The Oligocene Ruslar Formation, an equivalent of the Maykop Suite, is a potential hydrocarbon source rock in the western Black Sea Basin. In contrast to the offshore areas, the depositional environment and hydrocarbon source rock potential of onshore Bulgaria sediments are largely unknown. Hence, a 14-m-thick section of the Ruslar Formation, exposed near Karadere (Black Cape) along the Black Sea coast, provides an excellent opportunity to study the upper part of the Ruslar Formation.

21p tanmocphong 29-01-2022 12 1   Download

A carbonate build-up, 12 m thick, was formed with some interruptions, through the middle Pleistocene period. For this study, two travertine sections (F and D) were extensively used to figure out palaeoenvironmental and palaeoclimatic proxies. The main precipitation cycles, separated by palaeosol levels, have been described and interpreted from a sedimentological perspective. The carbonate deposits consist of shrubs, crystalline crust, reed, laminated (micritic), pisoids, oncoids, calcite thin rafts and coated gas bubbles, lithoclasts, and palaeosol levels.

19p tanmocphong 29-01-2022 7 1   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

This paper proposes an optimization procedure for maximization of the biaxial buckling load of laminated composite plates using the gradient-based interior-point optimization algorithm. The fiber orientation angle and the thickness of each lamina are considered as continuous design variables of the problem.

12p tamynhan6 14-09-2020 13 1   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 12 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 10 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