Numerical study of the structural behaviour of impacted composite laminates subjected to compression load

2015 ◽  
Vol 79 ◽  
pp. 456-465 ◽  
Author(s):  
F. Caputo ◽  
A. De Luca ◽  
R. Sepe
Keyword(s):  
Composite Laminates ◽  
Numerical Study ◽  
Structural Behaviour ◽  
Compression Load

Numerical Investigation of a Stiffened Panel Subjected to Low Velocity Impacts

2015 ◽  
Vol 665 ◽  
pp. 277-280 ◽  
Author(s):  
Aniello Riccio ◽  
S. Saputo ◽  
A. Sellitto ◽  
A. Raimondo ◽  
R. Ricchiuto
Keyword(s):  
Numerical Investigation ◽  
Composite Laminates ◽  
Mechanical Response ◽  
Numerical Study ◽  
Fem Analysis ◽  
Matrix Cracking ◽  
Stiffened Panel ◽  
Low Velocity ◽  
Formation And Evolution ◽  
The Impact

The investigation of fiber-reinforced composite laminates mechanical response under impact loads can be very difficult due to simultaneous failure phenomena. Indeed, as a consequence of low velocity impacts, intra-laminar damage as fiber and matrix cracking and inter-laminar damage, such as delamination, often take place concurrently, leading to significant reductions in terms of strength and stability for composite structure. In this paper a numerical study is proposed which, by means of non-linear explicit FEM analysis, aims to completely characterize the composite reinforced laminates damage under low velocity impacts. The numerical investigation allowed to obtain an exhaustive insight on the different phases of the impact event considering the damage formation and evolution. Five different impact locations with the same impact energy are taken into account to investigate the influence on the onset and growth of damage.

A numerical study of the influence of Z-pin parameters on the elastic properties of laminates

2020 ◽  
pp. 096739112097008
Author(s):  
Mengjia Li ◽  
Puhui Chen
Keyword(s):  
Elastic Properties ◽  
Composite Laminates ◽  
Numerical Study ◽  
Element Model ◽  
Fe Model ◽  
Insertion Angle ◽  
Benchmark Tests ◽  
Parametric Analyses ◽  
Longitudinal Modulus ◽  
The Impact

A finite element model with periodic boundary conditions was developed to investigate the influence of different Z-pin parameters including diameter, spacing, and insertion angle of Z-pin on the elastic properties of composite laminates. Benchmark tests were carried out to verify the FE model and a series of parametric analyses were subsequently performed. In general, all the elastic moduli, excluding the through-thickness modulus ( Ez), decreased while Ez increased nonlinearly with increasing Z-pin diameter and decreasing spacing. The reduction of Ey (transverse modulus) was approximately 40% of that of Ex (longitudinal modulus), while the reduction of Gxy is similar to that of Ex. Besides, Gxz and Gyz were reduced by approximately half of the reduction of Gxy. Although the impact of insertion angle was obvious on Ez, it was negligible on the other five moduli.

scholarly journals SIMULATION OF T-JOINTS BETWEEN RHS STEEL MEMBERS WITH OFFSET IN ABAQUS CAE

2021 ◽  
Vol 30 ◽  
pp. 36-40
Author(s):  
Svitlana Kalmykova
Keyword(s):  
Numerical Models ◽  
Mesh Size ◽  
Maximum Deviation ◽  
Structural Behaviour ◽  
T Joints ◽  
Compression Load ◽  
Hollow Section ◽  
Steel Members ◽  
Deformation Limit ◽  
Steel Joints

The current paper focuses on numerical simulation peculiarities of offset welded rectangular hollow section joints. Understanding the modelling techniques can result in easier and faster and above all correct outcomes from FEA for future use. The steel joints under discussion are composed from cold-formed regular rectangular hollow sections where RHS brace members are laterally shifted from chord axis. Joints work under monotonically increasing compression load applied to a brace top. Numerical models were developed in FE programme Abaqus. FE-models is composed of C3D8R 8-noded solid linear brick elements with an emphasis on mesh size effect and modelling of a weld seam. FE advanced model were compiled considering both material and geometric nonlinearities. For validation purposes, the full-scale laboratory tests were conducted. Proposed FE models reliably predict the structural behaviour of welded offset T-joints thanks to good agreement achieved on deformation limit 3 % b0 with the maximum deviation 10.3 %.

scholarly journals Structural Behaviour of Putra Block Under Axial Load Using FEM

2018 ◽  
Vol 79 (1) ◽  
Author(s):  
Pang Wei Ken ◽  
Abdul Aziz bin Abdul Samad ◽  
Goh Wan Inn ◽  
Noridah Mohamad ◽  
Mohamad Zulhairi Mohd Bosro ◽  
...  
Keyword(s):  
Finite Element ◽  
Axial Compression ◽  
Axial Load ◽  
Ultimate Load ◽  
Research Work ◽  
Research Centre ◽  
Structural Behaviour ◽  
Element Analysis ◽  
Compression Load ◽  
Hollow Block

Interlocking hollow block (IHB) system is a new building technology which eliminates the mortar layer and instead provides a key connection (protrusions and grooves) to interconnect the blocks. With respect to the mortarless feature of the system, it will shorten the construction period, reduce labour and cost, and is environmental friendly. This study covers the modelling and the analysis of Putra Block which is an interlocking hollow block system developed by the Housing Research Centre at Universiti Putra Malaysia (UPM) under axial compression load using Finite Element Method (FEM). The block units comprise of a stretcher block, a corner block and a half block. The aims of this research were to develop the Putra Block prism model using ABAQUS software and to study the structural behaviour of these prisms under axial load using finite element analysis. The Putra Block prism consists of three layers of blocks where the top and bottom layer are made of stretcher block where the middle layer are made of two half blocks placed side by side. Before proceeding with the simulation study, validation of the Putra Block prisms was conducted by using results from previous experimental research work. It was found that the ultimate load between experimental and simulation results had slight differences with an error of 2.56%. The small variations justify the ability of ABAQUS to predict the structural behaviour of elements under axial compression load with good accuracy level. Based on the FEA study, higher compressive stress value was observed on the face-shell of the block whilst higher tensile stress occurred at the webs. The failure of the prisms was mainly due to extensive tensile cracks induced at the web-shell interaction and middle of the block. Further parametric study reveals that by increasing the height of the individual blocks lead to the reduction of its ultimate load. Consequently, the use of higher concrete grade block indicated an improvement in the prism strength and stability under axial load.

Static Strength of Sleeve Reinforced X-Joints Loaded by Compression Load

2006 ◽  
Author(s):  
Feng Qi ◽  
Jia-Hua Tan
Keyword(s):  
Failure Modes ◽  
Numerical Study ◽  
Static Strength ◽  
Geometric Parameters ◽  
Systematic Variation ◽  
New Method ◽  
Design Recommendations ◽  
Compression Load ◽  
Joint Design ◽  
Strength Enhancement

In this paper a new method to reinforce X joints is presented depended on the connection between pontoon and leg of semi-submersible. As a part of total research, this paper extends numerical study to sleeve reinforced X-joints subjected to compression load through systematic variation of the main geometric parameters. The load transferring mechanisms and failure modes of such joints, with different sleeve size, are investigated and compared with corresponding un-reinforced joints. Within the range of geometric parameters investigated, the sleeve is observed to provide strength enhancement up to 200% for the corresponding un-reinforced joint. Design recommendations are provided for this joint type.

Sign in / Sign up

Export Citation Format

Share Document