Riga Technical University – Institute of Materials and
Structures
Competences in composites for space technology
research
Dr.sc.ing. Kaspars Kalniņš
kaspars.kalnins@sigmanet.lv
Phone: +371 26751614
International Space Information Day
Toulouse, France - 2 July 2014
Airbus UK, Bombardier
RTU, CTL, SWS
Finite element modelling and analysis of sandwich and
laminated composites and structures
Optimal design of composite materials, structures and
GKN
Airbus UK
NLR, ATS
Airbus Espana,
INTA, AICIA, UPM
EADS-M Ottobrunn
technological processes
Damping analysis of composite materials and structures
Damage identification in composite materials and
structures, structural health monitoring
Fracture and damage mechanics in laminate composites
Strength, stability (buckling/postbuckling) and collapse of
composite structures
Smart control by piezoelectric materials
Experimental dynamic (modal, impact, fatigue) tests and
analysis
International Space Information Day
Toulouse, France - 2 July 2014
Riga Technical University
Institute of Materials and
Structures
5th Framework Programme: 3 EC funded projects
6th Framework Programme: 11 EC funded projects
7th Framework Programme: 9 EC funded projects
Advanced and Low Cost
Aircraft Structure (ALCAS)
Integration of Technologies
in Support of a Passenger and
Environmentally Friendly
Helicopter (FRIENDCOPTER);
http://www.friendcopter.org/
New Robust Design Guideline for
Imperfection Sensitive Composite
Launcher Structures (DESICOS)
One-Shot Manufacturing on Large Scale
of 3D Up Graded Panels and Stiffeners for
Lightweight Thermoplastics Textile
Composite Structures (MAPICC 3D)
International Space Information Day
Toulouse, France - 2 July 2014
Metamodelling methodology
160x10 3
K3
140x10 3
P3
120x10 3
[kN]
220
h,
ht
100
0
0.0
0.5 u1
1.0
u2
1.5
u3
[m
0.020
0.019
0.018
120
]
140
0.017
1.4
1.3
1.2
Panel
ra
2.0
Shortening u [mm]
0.016
1.1
1.0
dius R
0.9
0.8
0.015
ig
20x10 3
, [m]
0.0
Design and evaluation of
numerical experiments
-0.5
Input-output Model & Metamodel building
data
(RSM, nonnon-parametric approximation)
(FEM, Multibody dynamics)
-1.0
-1.0
-0.5
0.0
0.5
1.0
x2
Simplified models of
objective and constraint
functions
Design and evaluation
of natural experiments
Validation and
verification
Shrinking of search
region
Needs additive
experimental runs
Optimal
parameters
Optimization
Improved multistart
random search
Additive userdefined functions
220x10 3
Skin buckling load, L = 0.6 m
Skin buckling load, L = 0.7 m
Skin buckling load, L = 0.8 m
Panel buckling load, L = 0.6 m
Panel buckling load, L = 0.7 m
Panel buckling load, L = 0.8 m
200x10 3
Optimum design guidelines
Parametric sensitivity
Weight savings
Load per arc length P/a [N/m]
x1
K1
160
1.5
Point sequence from 2 to 5
Point sequence from 6 to 13
Point sequence from 14 to 25
Point sequence from 26 to 41
0.5
40x10 3
ANSYS/LS-DYNA
Prebuckling metamodel
Skin buckling metamodel
Stiffener buckling metamodel
Collapse metamodel
180
he
Centre point
P1
60x10 3
er
Fixed design input
variables
80x10 3
200
St
iff
en
Sequential design space [-1;+1]
1.0
K2
Post-buckling critical load Pcr,
Domain of interest
Load P [N]
P2
100x10 3
180x10 3
160x10 3
140x10 3
120x10 3
100x10 3
80x103
60x103
3.5
4.0
4.5
5.0
b
R× s
5.5
6.0
Toulouse, France - 2 July 2014
6.5
Displacement, mm
ZWICK Z100
100kN – optical
strain measuring
equipment
INSTRON 8872
INSTRON 8802
E3000; E10000
10; 250kN fatigue testing
equipment\\\
1,5
1
0,5
0
1
International Space Information Day
2
3
4
5
6
7
Toulouse, France - 2 July 2014
DESICOS
RTU role in the project
New Robust DESign Guideline for Imperfection
Sensitive COmposite Launcher Structures
Vibration Correlation Technique (VCT)
220000
1N
10 N
20 N
140000
30 N
120000
40 N
50 N
100000
60 N
70 N
80000
80 N
60000
Project Coordinator:
100 N
20000
Pcr=220 [kN]
1.2e+5
1.0e+5
8.0e+4
6.0e+4
4.0e+4
2.0e+4
1.05
1.00
0.95
0.90
0.85
0.80
0.75
0.70
0.65
0.60
0.55
0.50
0.45
0.40
0.35
0.30
0.25
0.20
0.15
0.10
0.05
0.0
0
Shortening, mm
100
200
300
400
Load P [kN]
Experimental Testing and Numerical Analysis
ISS+JAVE D300
Load, kN
Partners:
Manufacturing
International Space Information Day
1.4e+5
0
0.00
German Aerospace Center (DLR),
Institute of Composite structures and Adaptive Systems,
Braunschweig, Germany
90 N
40000
m=1; n=18
m=1; n=16
m=2; n=24
m=2; n=22
1.6e+5
5N
160000
Load, N
February, 2012 – January, 2015
Perfect
180000
Square of frequency f2 [Hz2]
Duration:
1.8e+5
200000
85
80
75
70
65
60
FEM
55
ANSYS
50
45
40
35
30
25
20
15
EXPERIM
10
5
0
0.00 0.25 0.50 0.75 1.00 1.25 1.50 1.75 2.00 2.25 2.50 2.75 3.00
Shortening, mm
Toulouse, France - 2 July 2014
Riga Technical University – Institute of Materials and
Structures
Competences in composites for space technology
research
Dr.sc.ing. Kaspars Kalniņš
kaspars.kalnins@sigmanet.lv
Phone: +371 26751614
International Space Information Day
Toulouse, France - 2 July 2014