IRJET - Topology Optimization of Continuum Beam Structure using Optimality Creation Mode in ANSYS

International Research Journal of Engineering and Technology (IRJET) e-ISSN: 2395-0056
Volume: 07 Issue: 04 | Apr 2020 www.irjet.net p-ISSN: 2395-0072
© 2020, IRJET | Impact Factor value: 7.34 | ISO 9001:2008 Certified Journal | Page 1951
Topology Optimization of Continuum Beam Structure using Optimality
Creation Mode in ANSYS
Virendra Talele1, Niranjan Sonawane2, Omkar Chavan3, Harshal Patil4, Anant Kokate5, Sarthak
Kanthale6
1,2,3,4,5,6U.G, B.Tech Student, Department of Mechanical Engineering, MIT School of Engineering, MIT ADT
University, Pune, Maharashtra, India.
---------------------------------------------------------------------***----------------------------------------------------------------------
Abstract – Topology optimization is a technique to
optimize material conditions in the given set of design
constraint limits by reducing the number of compliance
variables in structure. In the present paper, the significant
theory of topology optimization and experimental
validation of continuum structure using ANSYS software is
performed on a structural one end fixed Beam. The
optimized evidence is established by validating theoretical
and computational evidence based on the pseudo density
factor.
Key Words: Topology optimization-TO, Ansys,
Continuum structure, Beam, Optimality creation (OC
method).
1. INTRODUCTION
Topology optimization is a technique to optimize material
conditions in a given set of design constraints, by
preparing a mathematical model that sets a goal of
maximizing system performance by optimizing material
sets loading and boundary conditions in a given constraint
limit. In shape optimization and size optimization, there is
a limit in designing features where a final geometry
creation cannot obtain configure results in freedom of
shape change whereas in Topology optimization there is a
freedom in geometry creation in which the design can
obtain any size and shape accordingly in between the
given sets of constraint limits.
In the creation of topology optimization, it uses a Finite
Element Method and Finite Element Analysis technique to
validate and configure design structural performance of
the systems. The topology optimization works on the
factor of pseudo density factor which is state variable
forms of response accordingly in mass and volume
compliance of the structure. The pseudo density factor
range from 0 – 1 where 0 means no material condition and
1 means a rigid material condition that can be vital from
the geometry based on mass or volume constraints.
2. OPTIMIZATION TECHNIQUES
The structural optimization has broadly classified in
several working limit in which it is mainly classified into
four types, a)Shape and Size optimization b) Topology
optimization c) Layout optimization and Structural and
material optimization. The main prime serves functional
characteristics of topology optimization is to find out the
most prominent material distribution in the system.
In 1988 Bendsoe and Kikuchi were the first pioneer of an
optimization technique in which they have proposed the
method of homogenization for ainstopic material based on
boundary variation techniques. In 1991 Suzuki and
Kikuchi, have continued the research of the
Homogenization method which with later modification
they presented the strength based on plane structures for
linear elasticity.
In 2008 Hui Zhang & Xiong Zhang & Shutian LiuIn have
proposed the theory with practical validation that
corresponding nodes in element carry a similar part of
loading as the previous node carries with them in
connection.
There is very Scant Knowledge about topology
optimization but later on, upgrading decades Designers
got to know the benefit of topology optimization which
can effectively use for developing efficient low weight
structure which can sever for very wide applications from
industrial to medical products. In the presented paper the
Topology optimization scheme has been developed for a
continuum structural beam where the aim is to showcase
how optimality creation method works by vitalizing out
the stiff part from the structure based on pseudo density
factor.
3. MATERIALS AND METHODS
In the present paper, The Topological optimization has
been developed on a continuum structural beam which
again further has been validated to check the stability
against fracture and creep development by using the FEA
Structural Analysis package of ANSYS software based on
FEM equation of optimality creation approach.
 Numerical Scheme.
General formulation: Set of function to find design
variable, X
Minimize F(X) (1)

Subject to:
Gj (X) <0 ; j=1, m (2)
iXL < Xi < Xi
U ; i=1, n (3)
[K]u = p (4)
Equation 4 states the Finite element method to solve the
displacement of vectors and minimum weight structure in
constrained limits [].
 Optimilatity creation approach.
Optimality creation method is also known OC method of
moving asymptotes it is based on multiplying the number
of elements N1…Nn with the lagrangian variables stated λ1….
λn to justify and expose the maximum stiffness area in the
structure which can be performing using for Optimizing
layout based on Mass or volume-based constraints.
4. FINITE ELEMENT SCHEME AND TO
INITIALIZATION
 The flow of Topology optimization
 Pre-Processing.
In the present paper, a continuum structural beam is used
for the execution of experimental study to perform and
validate topology optimization using Ansys software. The
continuum structural beam is a type of a structure whose
elements and nodes are closely backed with each other,
this type of structure is widely used in the heavyweight
sustainable application and connecting pathway of two
distinct or similar structures.
Figure.1. Pre-processing
Above Fig shows the preparation of geometry creation and
vitalizing out the major defects in connections. Hexa
dominant meshing is been developed on the structure
where the material used is static structural steel for the
structure.
 FEA Modelling.
The design structure is been validated for equivalent
stress to determine the induce stresses in geometry and
determine the material compliance on the structure
whereas the aim is to expose the zone of stress and
rigidity in the structure by performing static structural
investigation for equivalent stress.
Figure 2. Equivalent stress in the Beam.
 Topology optimization.
In Topology optimization, the aim is to vital in the induce
rigid zone of the structure while reducing and minimizing
compliances in the structure. A Topology optimization
works on based of Pseudo Density Factor in which it
discreet material in 0 to 1 configuration where 0 means
stress induce zone and 1 means Rigid/Stiff zone which can
remove from the structure based on Mass or volume
constraints of Optimality creation method.
Figure 3. Topology optimized geometry based on
Pseudo density discretion.
5. RESULTS
 FEA modeling of optimizes structure.
After completing the Topology optimization operation it is
must-revalidate our new obtained geometry for the
sensible design approach. After all, if the induce
compliance or stress in the geometry gets increase above
working limit after Topology initialization it doesn't make
worth manufacturing it because it causes fail of the
structure. In present results we can see the induce stress
in the Geometry is within the working limits.
Pre-
Processing
•Geometery Creation
•Checking defects and connection
•Meshing
FEA
Modeling
•Appling Sets of practical boundary condition and Material
•Determing material compliance and stress induction
•Determining zonal conditions i.e (Strees and Stiff zone)
Topology
optimizatio
n
•Discreating geometry accordingly pseduo density facor
variable 0 to 1 conditions
•Optimizing Gemetry accordingly Mass or volume baised
constraints by using Optimilaty creation approch.

Figure 5. FEA Validification of Optimize geometry for
the sensible design approach.
6. CONCLUSIONS
In present paper, The detail overview and working of
Topology optimization is presented whereas the
continuum structural beam is used for an operation of TO
in which first it has been validated for initial FEA
boundary condition to flash the zonal stress and stiffness
area in the structure. Further based on the pseudo density
factor the geometry has been discredited according to the
zone for topology optimization initialization in it vital out
the stiff region based on mass constraint to get optimize
the shaped layout. To make this approach more towards
sensible design the optimize shape is again validated for
induce stress to determine if there is any certain failure
induce in structure after optimization.
The sensible design approach is very important factor in
Topology optimization because it bridges the point of
Optimization theory and final development of product by
means of Additive manufacturing.
REFERENCES
[1] Michell A G. The limits of economy of materials in
frame structures, 589-597(1904)
[2] G.N. Vendarplaats “Thirty years of modern structural
optimization’’, Advance in Engineering software 16,
pp. 81-88 [1993].
[3] Bendsøe and Kikuchi “Generating optimal technology
in structural design using a homogenization method”,
Computer methods in applied mechanics and
Engineering 71, pp. 197-224 [1988].
[4] Dheeraj Gunwant and Anadi Misra “Topology
Optimization of Sheet Metal Brackets Using ANSYS”,
MIT publication vol 2 pp. 120-126 [2012].
[5] Davin Jankovics, Hossein Gohari, Mohsen Tayefeh and
Ahmad Barari “Developing Topology Optimization
with Additive Manufacturing Constraints in ANSYS”,
IFAC conference paper 51-11 [2018].
[6] ANSYS technical guide and theoretical reference, 5.6
[1999]
[7] Seongyeol Goo, Semyung Wang, Jaeyub Hyun and
Jaesoon Jung “Topology optimization of thin plate
structures with bending stress constraints”,
Computers and Structures 134-143 [2016].
BIOGRAPHIES
Virendra Talele, Undergraduate
Research Scholar.
Diploma in mechanical engineering,
Advance Diploma in product design and
development. Expertise area in BIW,
CAE, CFD, Battery thermal cooling and
Toll die Design. Studying Btech in
mechanical engineering at MIT school of
Engineering.
Niranjan Sonawane, Diploma in
mechanical engineering and studying
Btech in mechanical engineering at
MIT school of Engineering.
Harshal Patil, Diploma in Automobile
engineering and studying Btech in
Engineering.
Omkar Chavan, Diploma in Automobile
Engineering.
Anant Kokate, Diploma in mechanical
Engineering.
Sarthak Kanthale, Diploma in
mechanical engineering and
studying Btech in mechanical
engineering at MIT school of
Engineering.

IRJET - Topology Optimization of Continuum Beam Structure using Optimality Creation Mode in ANSYS

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