chapter 4 - material property charts

what could be used to survey design-limiting properties

material property charts

2 kinds of material property charts

• single- property (bar) charts

• two-property (bubble) charts

goal of property charts

plot one property against another and map out the fields in property space occupied by each material class

what does the bar and the length of the bar show on bar charts

bar - describes one material

length - range of modulus exhibited by that material in its various forms

on a bar chart the material is segregated by

class

the total scale range uses what? and why?

logarithmic scales because the total scale range is so large

the data for one family of materials in enclosed in what?

a colored property envelope

what are design guidelines

they are the dotted lines on the charts that connect the materials that have the same property

design guidelines provide

the slope, a number

material indices

design-optimizing parameters that can also be plotted as countours

steps for the systematic approach to analyzing density charts (3)

1- take the log of both sides of the equation

2- turn it into the linear form of y=mx+b to get the slope and y-intercept

3-plot it on a logarithmic scale to get the design guidelines

all the materials on the same line have the?

same constant value

all the materials above the line have

a higher value of constant

what are contours

the family of parallel diagonal lines that link the materials where the constant value is the same

the white bubbles show

each class and subclass

elongated bubbles represent

the range of values for each property of each material due to influence by characteristics.