5.3 Flashcards
what is the finalchocie of atrials msotly infleucned by
cost
product function
material protperties
compressive strength meanign
ability to withstand beign crushed or shrotendd by pushign foces
exampel fo when conmpressiev strenth woudl be considered
people sittign on chairs
mutli story car parks
tensile strength
ability to reisst stretchign or pulling
exampel fo where tensile strength cosnidered
ropes and cables
stiffness
ability to reist forces that may bend material
where may stfifness be cosnidered
the deck of a bridge
shelf between two suporits
hardnsess
ability to withsdtad abrasive wear and scratchign
where may hardness be cosndiered
drill bits so they remain sharp etc to do job wihtotu fialirue
durability
ability to withsdtand wear and damag and wetaheirn g
exampel of where durabiluty cosnidered
kitchen utnesils
outdoor play equipement
impact reistsance
ability to absorb foce without fracture
example fo where impact resitance considered
drinsk bottle so doesnt smash when dropped
plasticity
the ability to be shaped and retain the shape
exmaple of where plastsicty woudl eb consdered
glass
elastcicity
the ability to be deformed then return to origional shape afetr force remoevd
where may elastsictiy be considered
stress releif balls
malleability
ability to withsstand deformtion by comrpession withotu crackign
where may mealleablity be considered
when heatign and hamemrign metals to shape
ductility
the ability to be drawn otu under tension, and reducign shit to a cross section
where may ductitlity be consdiered
stretchign material into wire
density
how compact shit i s
strength to weight ration
comparign weight of structure to the amoutn fo weight it can support withotu failirue
where may strength to weight ratio be considered
track cycles
motorsprot products
flammability
how eaisly shit burns once beign ignited
and the degree of diffculty required to cause combsusion
where may flammabiltiy be considered
sofas
cushios
biodegradable
ability for a product to break down and natrually decompose
where woudl biodrgadibiltiy be sodneired
single use products such as plastic bags
electrcial condcutivity
abiltiy to flow electric current through maetrial withotu resistance
where may electrical condcutivity be consdiered
circuitory
electrical casings
electrical insualtion
no electrical flow
hermal conductitviy
ability to transfer heat across materiasl
where woudl themral condcutivity be considered
cooking pans
pan hadnels
insualtion
corrosion/degredation resitance
abiltiy to withstand envrioemntal decay
where woudl corsosion rstance be cosnderied
outdoor structrues
when selectign products what must designers cosndier
prodcut fucntion
maetrail avability adn form
method of manfuacture
what does palstsicity mean 2.0
the ease for a a material to be shaped permaneently and retain that shape
what are polyclcicl aromatic hydropcarbons
chemcials that occru natruall in shti liek coal, crude oil and gasoline
what do polcyclic aromtic hydrop carbosn do when realsed, due to brunign fo stated ubstances
small aprticles in air fuckign lunsg and shit up
