DISCUSSION: Damage Measurements

The vehicle damage data as defined by the Collision Deformation Classification (CDC, per SAE J224 MAR80) and the Equidistant Crush Measurement (ECM, per SAE J2433) can be input to m-smac. Future releases of m-smac will use this data for graphical display, automatic placement of the Center of Collision Interface (CCI), and possibly an auxiliary routine which will perform an independent crush analysis (per a CRASH-type analysis).

Figure 17  Collision Deformation Classification (CDC) per SAE J224 MAR80

 

 

 

 

Figure 18 Equidistant Crush Measurements L & D dimensions

Figure 19 Equidistant Crush Measurements C1 through C6

 

Figure 20 FORCE DIRECTION (CDC Column 1,2)

 

 

Location	Classification
Front	F
Right Side	R
Back (Rear)	B
Left Side	L
Top	T
Undercarriage	U
Unclassifiable	X

Table 3 Deformation Location (CDC Column 3)

 

Location	Classification
Distributed - side or end	D
Left – front or rear	L
Center - front or rear	C
Right - front or rear	R
Side front - left or right	F
Side center section - left or right	P
Side -rear - left or right	B
Side or end (F+P) or (L+C)	Y
Side or end (B+P) or (R+C)	Z

Table 4  Specific Longitudinal or Lateral Location (CDC column 4)

Lateral Location – Top & Undercarriage Impacts	Classification
Distributed	D
Left	L
Center	C
Right	R
L & C	Y
R & C	Z

 

Table 5 CDC column 5 for Lateral Location of deformations if CDC Column 3 is 'T' or 'U'

 

Vertical Location – Front, Rear or Side Impact	Classification
All	A
Top of Frame to Top of Vehicle	H
Everything below beltline	E
Belt line and above	G
Middle - top of frame to belt line or hood	M
Bottom - top of frame, bottom, undercarriage	L
Below undercarriage - wheels & tires only	W

 

Table 6  CDC column 5 for Vertical Location of Impacts for CDC column 3 is 'L','B','L', & 'R' in Column 3

 

 

Figure 21 Deformation Extent Zones (For Passenger Cars) see SAE J224 (MAr 80) for other vehicle types

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Damage Measurements, POI & POR Targets