paper carton analysis
TRANSCRIPT
Geetha
Jagadeesan
Janet Amely
College of Engineering Guindy
Replacement of physical testing of paper
cartons in industry with a database
Creation of accurate Finite Element Model
of paper cartons
Investment on physical testing
Time
Optimization
Help SSI’s and Startups
Paper cartons dominate packaging market
CARTON DATABASE
VALIDATED SIMULATION
FINITE ELEMENT MODEL
Creation of finite element model of paper
cartons
Physical testing of cartons for the purpose of
validation
Simulation of loads
validation
Material Properties
physical
simulation
2 4 6 8 10 12 14 16
50
100
150
200
displacement(mm)
force(N)
Material testingFinite Element Model
Simulation
Validation
Carton Testing
Box Compression Strength
Pulp board 220 GSM, 350 GSM
Box dimensions
Ambient conditions
Tuck-in carton
Physical testing of material
Physical testing of carton
Finite Element model
Simulation
Comparison of simulation and
physical testing
Improvement of
Finite Element Model
Grain direction
Machine and cross direction
Orthotropic
Geometry
Thickness
Young’s modulus
Shear modulus
Poisson’s ratio
Paperboard selection
• Pulp board with similar properties on both sides
Paperboard conditioning
• Temperature :27+/-1 ̊ C
• Relative humidity :65+/-2%
Grammage
and
Direction
Dimensions Thickness
(mm)
Tensile
strength
(N/mm2)
Young’s modulus
(N/mm2)
220 GSM
Machine
direction
L=180mm
W=25mm
0.238 26.62 334.47
220 GSM
Cross
direction
L=180mm
W=25mm
0.238 15.18 144.75
350GSM
Machine
direction
L=180mm
W=25mm
0.375 30.11 345.95
350GSM
Cross
direction
L=180mm
W=25mm
0.375 17.79 167.27
Stress (kgf/cm²)
00
100
200
300
Percentage Strain0.0 5.0 10.0 15.0 20.0
Break
Greatest Slope
Preload
General Purpose Pull to Break Setup
Preload:
Speed:
Gauge Length:
Area:
Break:
1.00 N
10.0 mm/min
About 120.0 mm
About 25.1 mm x 0.360 mm
Load drops quickly
350 GSM-MD
Stress (kgf/cm²)
0
50
100
150
200
Percentage Strain0.0 5.0 10.0 15.0 20.0 25.0
Break
Greatest Slope
General Purpose Pull to Break Setup
Preload:
Speed:
Gauge Length:
Area:
Break:
Not Applicable
20.0 mm/min
About 120.0 mm
About 25.1 mm x 0.360 mm
Load drops quickly
350 GSM-CD
350 GSM Machine Direction
350 GSM Cross Direction
• Geometric model
• Finite Element Model
• Analysis
• Postprocessing
• Refining Results
MESH SIZE (mm) FORCE (N)
12.3 0.7542
6.15 1.2057
3.075 1.2060
• Carton design :Glued
• Dimension : 85mm * 125mm * 246mm
Grammage and
direction
Compressive Strength
(N/mm2)
Load at Limit
(N)
Stress at limit
(N/mm2)
220 GSM Machine
direction
0.00519 41.10 0.00392
220GSM cross
direction
0.00421 26.38 0.0240
350GSMMachine
direction
0.0254 168.92 0.0158
350GSMcross
direction
0.0223 163.53 0.0153
simulation
physical testing
2 4 6 8 10 12 14 16 18
50
100
150
200
x
y
displacement(mm)
Force (N)
physical
simulation
2 4 6 8 10 12 14 16
50
100
150
200
displacement(mm)
force(N)
• 10% force deviation
• 4mm peak deviation
physical
simulation
2 4 6 8 10 12 14 16
50
100
150
200
displacement(mm)
force(N)
Simulation reliable
Scope for improvement- creasing
phenomenon