Engineering Design & FEA Solutions

ENGINEERING SOLUTION PROVIDER
We are engineering design consultants, providing services to wide range of clients ranging from
civil, automotive to oil & gas industry. We have more than 30 years of combined experience be-
tween us in various engineering sectors. We invest in our people and technology to make sure
our engineering capability is top notch. Our services are affordable with reasonable charges yet
we do not take shortcuts that compromise the integrity of our design, or our attention to detail.
At EDSIL, our clients’ complete satisfaction is of paramount importance to all of us.

"At EDSIL we aim to establish meaningful relationship with our clients which
ensures the delivery of high quality, cost effective engineering solutions
every time.”

HIGH QUALITY, LOW COST DESIGN SOLUTION

DRAUGHTING & DETAILING SERVICES
We provide engineering design and Computer Aided Design services, using the latest tools avail-
able to keep us abreast with the latest technology in the industry. We provide 2D and 3D CAD
draughting services that suit your needs at competitive charge. We invest heavily in our design
software and facilities including several plotters to print your drawing of up to A0 size paper. We
have access to software such as Solidworks, AutoCAD, ANSYS, SCIA and Robot Millennium for
design and validation. Other services that we provide includes site survey, technical documenta-
tion, paper to CAD conversion and reverse engineering.
“We are committed to serving our clients
and providing the highest quality services
and innovative solutions.”

ENGINEERING DESIGN SERVICES INTL LTD

Finite Element Analysis
FEA SERVICES
Apart from engineering and Computer Aided Design services, we offer in-house state-of-the-art simulation services
for the stress analysis of solids and structures in statics and dynamics. The analysis can be linear (small strain, linear
elastic materials) or highly nonlinear. With advance FEA solver, we could run design optimisation with a large num-
ber of design variables. This will ensure that products have greatest performance while remaining cost effective. We
take your ideas and an understanding of the conditions they will be used in and create a set of virtual experiments to
show how the design responds to real world situations. We can examine deformation, stress and strain response to
loading, in single parts or in assemblies with multi part contact. We can look at mechanical events, motion of parts,
kinematics, and impact. The following shows the examples of analysis that we performed.

Transient Sequential Thermal-Structural Analysis

• Metal forming analysis- large displacement, plastic flow,
transient analysis.
• Highly nonlinear-material and buckling nonlinearity.
• Examples shown in the pictures are the analysis of
metal forming of sheet and tube by laser scanning. The
analysis can be uncoupled into sequential thermal and
stress analyses The thermal problem is solved first to
obtain the temperature field, which is then used as ther-
mal loading for the structural problem. The same mesh
is used for both thermal and mechanical calculations.
The problem can be represented by only half of the
plate modelled with symmetric boundary conditions. The
temperature field caused by a moving laser beam is
transient in nature. Laser heating is modelled as moving
heat flux used to incorporate the laser beam motion.
The temperature-dependant material properties are con-
sidered including thermal conductivity, specific heat,
thermal expansion coefficient, Poisson’s ratio, elastic
modulus, yield stress and density. The temperature dis-
tribution, deformations, plastic strains and residual
stresses were analysed.

[C][T]+[K]{T} ={Q(t) }
&

EDSIL, Unit 17, Evans Business Centre, Dane Street, Rochdale, Lancashire, OL12 6XB, United Kingdom
Tel: +44 (0)1706 343933 Email: Projects@edsil.co.uk Fax: +44 (0)1706 525080
Website: www.edsil.co.uk


Contact Analysis

• Linear contact (glued), frictional, fric-
tionless, offset etc.
• Various type of contacts (ie; rigid to
deformable, surface to surface, sur-
face to edge etc)
• Gasket analysis
• Examples shown in the figure are
gears meshing used in rack and pin-
ion system. Frictional contact were
considered between the gears. Cylin-
drical boundary condition was used
to model gear rotation, with fixed
radial and axial direction. Also pivot
joint for a construction tying applica-
tion.

Linear, Non-linear Static & Buckling Analysis

• Material non-linearity (bilinear strain-stress behaviour, hard- Before After
ening, etc.), Elastic to plastic material transformation
• Geometric non-linear buckling or material failure
• Large displacements or rotations, Non-linear boundary con-
ditions
• Example shown in the picture on the right is a drive car-
riage for a 5 tonne capacity lift. The FEA was vital part of the
design where it enhances the structural integrity of the com-
ponents due to its extreme loading conditions.
• Example below is a nonlinear buckling analysis of a lamp Structural validation of 5 tones lift drive carriage.
post under extreme wind condition. With nonlinear analysis
capability, a more
accurate critical
buckling load was
determine.

Lamp post failure investi-
gation– nonlinear buck-
ling analysis.



Structural Design Optimisation

Conventionally, the way of improving design relies on
engineer’s experience. This could be years and years
of trial and error and design iteration process. For
those engineers without much experience, or for a new
process or design, the consequence is that the process
could be costly. FEA can play a vital part in producing
effective products in the most efficient manner. In the
last decade, optimisation technique has been embed-
ded as a design tool in FEA software to enable design-
ers to efficiently arrived at the optimum solution,
Design Variable :
Find {X}=(r, u, v, w, x) whether in sizing, shape or topology.
Objective function :
Minimise cost {X} With this tools and knowledge, we could set a goal for
Subject to constrain: a product, for example minimise the weight or cost.
Stress σmin < σ < σmax
Then a specific range of design variables are estab-
Displacement < y
lished, such as specific parametric dimensions. Design
constrains are determine (such as specific maximum
stress, or displacement) for the product based on the
material and function. Design of Experiments (DOE)
method could be use to established an ‘experimental
array’ which is then used to run a set of analyses. The
analyses results could then be plotted on a response
surface map to see the effect of each design variable
to the objective. Few algorithm could then be used to
established the optimum design variables to meet the
objective.
Response Surface Methodology (RSM)

Failure Investigation
Failure of a design could be in many
forms, including fatigue, in-service loads,
corrosion etc. We work with clients to iden-
tify the background of the failure before
starting the investigation. A preliminary
conclusion is formulated which is then form
the basis of the investigation. If probable
cause of failure could be identify, the in-
vestigation focuses on confirming the fail-
ure cause and eliminate the others. Often
FEA is used to verify the stresses and ca-
pacity of the material. A report detailing the
investigation method and the outcome is
prepared together with suggestions to im-
proves the design.



Civil structure– Frame analysis
Marina Bay Sands, Singapore - Mobile Cladding
Access Platforms:

We were asked to provide design for cladding access
platforms for what is now the worlds most expensive
hotel, Marina Bay Sands. One unit was a mobile sus-
pended platform to provide access to the underside of
the Sky Park 200m above ground level. The platforms
had to run on two tracks attached to the structural
steelwork and the platform was fully clad which meant
wind loading would features a major factor in the de-
sign.

The platform was modelled using frame analysis.
Loads combinations including high wind loading were
considered according to national standard. The plat-
form was made of aluminium profile, and therefore
BS8118 was used as a verification method.

In addition, a bespoke mobile trolley was design for
the suspended structure and as a critical component
within the system the trolley design was verified using
FEA.

Solid FEA-Bespoke mobile trolley

"At EDSIL we aim to establish meaningful relationship with our clients which ensures the delivery of high quality, cost
effective engineering solutions every time. We are committed to serving our clients and providing the highest quality
services and innovative solutions. We do not take shortcuts that compromise the integrity of our design or our atten-
tion to detail. At EDSIL our clients' complete satisfaction is of paramount importance to all of us."



Oil & Gas –Offshore bleed ring
Task
Verification of the structural integrity of a non-standard
bleed ring for oil rig application. The task is to provide
mechanical design calculation to confirm the adequacy
of the thickness of body, bolt load and gasket operat-
ing performance. Analysis should ensure that the bleed
ring can withstand the subjected assembly load and
vibration during normal operating conditions.

Analysis
Taking asymmetric advantage only half of the adapter
is modelled. Bolts pretension on the adapter body is in
accordance with the API Recommended Torques for
flanges. Bolts pretension on the nipoflanges is derived
from requirement in B16.5. The analysis has consid-
ered two time steps; 1. bolts pretension and 2. applied
internal pressure of up to 5000psi.
The stresses were compared to those allowed for the
material used and assessed against industry standard.

Outcome
The analysis showed that the the proposed body thick-
ness is sufficient to withstand the combination of bolts
pretension and internal pressure and confirms that the
item is working within its strength capacity.

“Let us do the THINKING for you”



Manufacturing-shell analysis

Task
To verify the structural integrity of a sheet metal board in accordance
with BS EN12811-2. The actual boards of 1.5, 2, and 2.5m length
were supplied to us for in-house testing and verification.

Testing & Analysis
EDSIL has conducted a series of in-house tests as required by the
code. Comparing with initial hand calculations, the boards failed
against the design concept of a locked seam. Having to reassess the
design as behaving with a far more complex geometry has proved
difficult. We therefore decided to carry out a shell finite element
analysis and ignoring the locked seam effect.

Outcome
We have finally been able to analyse the section in a manner that
allows the seam to slip. This has drastically reduced the theoretical
board capacity to a point below the tested results. With the test re-
sults now being moderately above the theoretical design capacity the
tests can now be viewed as proving the capacity of the design. This
is a requirement for passing these boards as certifiable to BS EN
12811-3 and giving them a partial designation in accordance with BS
EN 12810-1 clause 5.

EDSIL services:


Engineering Design & FEA Solutions

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