Seats Testing/Validation Concepting

Ownership

Research

Car Requirements

Safety Criteria:

• Adhere to all the safety specifications as listed by ASC

• Accommodate a five point safety harness

• integration of head, shoulder and side containment features into the seat

  • prevent lateral movement of the body

  • must ensure this does not interfere with egress and peripheral vision of the driver

    • not obstructing as much peripheral vision

• seat belt pass through should be right at the shoulder height of the driver

Line of Sight

• height adjust seems it will be risky

• Sliding seat (lateral movement)

• Tilting seat

  • might be risky like height adjustable one

  • seems more viable

Comfort

• support the human body and spine

• also conduct preliminary research into padding

  • Sheila will look into more of this

  • though you should still research to understand which materials will fit into the final design

• research into how seats are kept ventilated

Ideas i had/ things i thought about

• Depending on how we decide to hold things in place (ex glue) will have to test out if it is strong enough

• Testing the seatbelts to make sure they are functional

• Testing the materials chosen for the seat if it is comfortable, breathable etc

• Testing the vision requirements, must be able to see 700m from the ground when the chair is in standard position, certain angles etc

• Test and validate for ballast bag to make sure it doesn’t go flying (make sure it’s properly secured)

• Broken down into 2 Analysis - crash and safety and durability (what car companies use)

• Sled test is performed to test the the sled test performance include: strength of the seat anchorage and the adjustment, as well as the locking and displacement systems

• Height and weight for different ages https://www.engineeringtoolbox.com/body-weight-versus-height-d_1551.html

How other cars are tested

Crash and Safety :

• Seat Back Strength

• Seat Anchorage Dynamic Strength test

• Seat Structural Dynamic Test forward

• Strength of Seat Back Anchorage

• Luggage Retention / Partitioning Test 

• Head Restraint Energy Dissipation Test 

• Head Restraint Performance & Strength Test

• Seat-back Load Floor Test for Retention

Durability

• Head Restraint Lateral & Longitudinal Stability

• Vertical Load Strength of Cushion Frame 

• Seat Ornamentation & Knob Pull-off Strength 

• Actuator Strength in the Direction of Operation

• Seat-back Map Pocket Static Strength Requirements

• Seat-back Torsion Strength

• Jounce Test (Cushion & Back)

• Armrest Strength & Operating Effort

• Latch Catch Spring Test

• Jump Seat Strength

• Fatigue Resistance (seat structural fatigue durability test)

• Vibration Test for Resonance Point Detection

• Thermal Cycle Ageing Test or Creep Test 

3M Dual lock recosable fastener for seat

https://www.3m.com/3M/en_US/company-us/all-3m-products/~/3M-Dual-Lock-Reclosable-Fastener-SJ3541/?N=5002385+3293242271&rt=rud

Data sheet/ Typical Performance https://multimedia.3m.com/mws/media/1591570O/3m-dual-lock-reclosable-fastener-sj3542.pdf

Model SJ3541

• Black, interlocking mushroom-shaped heads (400 stem density per square inch) provide strong, reliable and durable fastening that can be opened and closed multiple times

• Mates with Type 170 and Type 250 stem densities to provide different strength combinations

• Synthetic rubber-based adhesive bonds well to a variety of substrates including low surface energy plastics such as polyethylene and polypropylene

• Strong fastener secures with an audible snap, verifying closure

• An alternative to screws and bolts, this hidden fastener provides a snug fit and smooth aesthetic appearance

• Features good temperature resistance of 120°F (49°C)

• Best suited for indoor use

3M™ Dual Lock™ Reclosable Fastener SJ3541 is the easy and clear alternative to traditional fastening methods, such as screws, nuts or bolts. It is designed to deliver a durable, reclosable fastening solution (which can be opened and closed multiple times) which bonds to a variety of substrates including many plastics and low surface energy materials.

Specifications

Seat Calculations

Ballast Calculations

Strap we are using https://www.canadiantire.ca/en/pdp/light-duty-lashing-straps-1-in-x-12-ft-2-pk-0402701p.html?rrec=true#spc

Bolster Update : Using straps for bolster instead of velcro. Max Newtons is 1471 which is 150kg which is below the 204kg max so it is safe

Seat and Bolster Test Bench - What is needed

1. Chassis needs to be installed

   1. maybe bottom panels

   2. maybe doors (the more parts of the car installed, the better)

   3. the more things installed the more parts we can try and fix for comfort (ex doors arent necessary but would help with overall comfort)

2. Construct bolsters and Seats out of wood

   1. general shape does not need to have exact curvature

   2. head part so we can see comfort with helmet

   3. make stackable seat separately and test comfort

   4. same for bolsters

   5. can get fabrics and cushions samples to test comfort

Questions to ask people testing

1. Rate comfort of cushions

2. Seat design, stackable seat overall comfort of seat and bolsters

3. Suggestions for how it can be modified/changed and proceed with those changes

Fabrics

• Doesnt need waterproof coating being used for catamaran cover

Material options

• PVC Fabric

  • lower end

  • uglier asthetic

  • Not very confortable

  • cheaper

• Nylon Fabric

  • universal seat fabric

  • Durable and Cheap

• Vinyl Fabric

  • Easy to clean

  • Nice asthetic (gives leather astheitic without being faux leather)

  • Durable and good quality

  • Comfortable

  • Good for a seat cover

  • Comes in wide range of colours