047 dalhousie-university fsaem iad124
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APPENDIX B-2
2012 FSAE™ IMPACT ATTENUATOR DATA REPORT – Page 1 of 3
This form must be completed and submitted by all teams no later than the date specified in the Action
Deadlines on specific event website. The FSAE Technical Committee will review all submissions which
deviate from the FSAE® rules and reply with a decision about the requested deviation. All requests will have a
confirmation of receipt sent to the team. Impact Attenuator Data (IAD) and supporting calculations must be
submitted electronically in Adobe Acrobat Format (*.pdf). The submissions must be named as follows:
schoolname_IAD.pdf using the complete school name. Submit the IAD report as instructed on the event
website. For Michigan and California events submit through fsaeonline.com.
*In the event that the FSAE Technical Committee requests additional information or calculations, teams have
one week from the date of the request to submit the requested information or ask for a deadline extension.
University Name: _Dalhousie University_ Car Number(s) & Event(s): 47, Michigan 2012
Team Contact: ____Nick Murray________ E-mail Address: [email protected]__________
Faculty Advisor: ___Julio Militzer_______ E-mail Address:[email protected]_____
Material(s) Used Aluminum Honeycomb
Description of form/shape 5052 3-3/16” - 200 mm x 200 mm x 100 mm
IA to Anti-Intrusion Plate
mounting method LOCTITE – E-120HP Hysol Epoxy Adhesive
Anti-Intrusion Plate to Front
Bulkhead mounting method 4x8 mm Grade 8.8 bolts
Peak deceleration (<= 40 g's) 17.595 g’s
Average deceleration (<= 20 g's) 15.2138 g’s
Figure 1: Force-Displacement Curve (dynamic tests must show displacement during collision and after the point
v=0 and until force becomes = 0)
ATTACH PROOF OF EQUIVALENCY
TECHNICAL COMMITTEE DECISION/COMMENTS
_______________________________________________________________________________________
Approved by__________________________________________ Date_____________
NOTE: THIS FORM AND THE APPROVED COPY OF THE SUBMISSION MUST BE PRESENTED
AT TECHNICAL INSPECTION AT EVERY FORMULA SAE EVENT ENTERED
0
10
20
30
40
50
60
0.0
6.7
13
.4
20
.2
26
.9
33
.6
40
.3
47
.0
53
.7
60
.5
67
.2
73
.9
80
.6
87
.3
94
.0
10
0.8
10
7.5
11
4.2
12
0.9
12
7.6
13
4.3
14
1.1
14
7.8
15
4.5
16
1.2
16
7.9
Load
(kN
)
Position (mm)
Load [kN] vs Position [mm]
Load [kN]
APPENDIX B-2
2012 FSAE™ IMPACT ATTENUATOR DATA REPORT – Page 2 of 3
University Name: Dalhousie University Car Number(s) & Event(s): 47, Michigan 2012
Figure 2: Energy-Displacement Curve (dynamic tests must show displacement during collision and after the
point v=0)
Figure 3: Attenuator as Constructed Figure 4: Attenuator after Impact
Energy Absorbed (J):
Must be >= 7350 J 8378.2 J Vehicle includes front wing
in front of front bulkhead? No
IA Crushed Displacement
(mm): 170 mm crushed Wing structure included in
test? N/A
IA Post Crush Displacement -
demonstrating any return (mm): 30 mm returned Test Type: (e.g. barrier test,
drop test, quasi-static crush) Quasi-Static Crush
Test
Anti-Intrusion Plate
Deformation (mm) 15 mm (after
return)
Test Site: (must be from
approved test site list on
website for dynamic tests)
Dalhousie University
Engineering Material
Testing Lab –
Instrom™ Hydraulic
Press
0
1000
2000
3000
4000
5000
6000
7000
8000
9000
0.0
8.3
16
.5
24
.8
33
.1
41
.3
49
.6
57
.9
66
.1
74
.4
82
.7
90
.9
99
.2
10
7.5
11
5.7
12
4.0
13
2.3
14
0.5
14
8.8
15
7.1
16
5.3
Ene
rgy
Ab
sorb
ed
(J)
Position (mm)
Energy Absorbed [J] vs Position [mm]
Energy Absorbed [J]
APPENDIX B-2
2012 FSAE™ IMPACT ATTENTUATOR DATA REPORT – Page 3 of 3
University Name: Dalhousie University Car Number(s) & Event(s): 47, Michigan 2012
Figure 5: Design Drawings
Length (fore/aft direction): ___200__ mm (>=200mm)
Width (lateral direction): ___200__ mm (>=200mm)
Height (vertical direction): ___100__ mm (>=100mm)
Attenuator is at least 200mm wide by 100mm high for at least 200mm: Yes
Attach additional information below this point and/or on additional sheets
Test schematic, photos of test, design report including reasons for selection and advantages/disadvantages, etc.
Additional information shall be kept concise and relevant.
Test Photos:
Impact attenuator before, during and after the crush test.
Showing maximum deflection of anti-intrusion plate less than one inch.
Design Selection: One of the main design goals for this year’s FSAE car was to make many of the components lighter and more effective than the previous year’s designs. This includes the impact attenuator, where the weight has been reduced by more than 20% and the space occupied has been reduced by more than 60%. This reduction in size also allows more flexibility in the design of the nose cone. In addition to being lighter and smaller, this year’s impact attenuator absorbed more energy than last year’s, ultimately making the car safer while staying within the parameters required by FSAE rules and regulations.