The 2020 SES documents will be released on October 18th.

The revised templates will now see the following included:

The IAD Impact Attenuator Document is now a tab at the end of each SES.

EV HV Protection, Containers, and Attachment are now included in each SES and applicable for Electric Vehicles only.

There are two categories for the 2020 SES:

All Steel Tube frames, including steel tube EV cars with steel or aluminum accumulators.

Aluminum equivalance may be used in the Steel Tube SES for Anti-Intrusion, EV Rear Impact, or Accumulator Containers and Mounting.

The Monocoque/Hybrid/Non-Ferrous SES is for all other cars.

Steel can be used for any part of the frame in the Monocoque/Hybrid/Non-Ferrous SES.

F.3.2.2 - Any and all steel grades are assigned the same material properties. No material properties for different grades may be used in the SES.

For a tube frame, IC car, the only changes are:

Looser SIS height regulation. Enclosure of pressurized cylinders by frame tubes.

For any EV car:

Rear impact requires an upper+lower+diagonal or composite or differential mount equivalent. Corner mounted accumulators are no longer required to attach to tube frames within 50mm of nodes.

For any composite car:

Non-quasi-isotropic layups will have to meet a calculated requirement for directional strength and stiffness.

It will incorporate seven factors:

a. Material mass fraction through 360 degrees.

Standard assumptions will apply to all teams.

These are being derived from industry and 2018 team data:

b. Ratio of Unidirectional laminate to woven fabric laminate strength in 0-direction.

c. Ratio of 0-90 fabric strengths in 0 vs 45 direction.

d. Ratio of Unidirectional laminate strength in 0 vs 90 direction.

e, f, and g are repeats of b, c, and d, but for stiffness.

The final minimum directional strength will be required to be between 50-100% of the maximum direction.

The final minimum directional stiffness will be required to be between 50-100% of the maximum direction.