模具英文资料

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模具英文资料
Material properties for part design
Plastics are sensitive to operating conditions
- ?) S- ^) w2 X' p% o  I2 }The plastics molding processes allow parts designers more freedom than working with
metals because plastics materials are so versatile. Unlike metals, however, the
mechanical properties of plastics are very sensitive to the type, rate, duration, and
) e% n& B# Y. afrequency of loading, the change in operating temperature, and in some cases, relative
4 f  F8 L9 B  o1 D. B: m1 M, Ahumidity. The plastics part designer must take a material's response to these conditions
into account. The table below lists the five typical loading and operating conditions,
together with the relevant material properties a designer needs to consider.
.
TABLE 1. Typical loading/operating conditions together with the relevant
7 u4 G: r: n6 l& c6 Rmaterial properties
  w  \/ p6 t* h* |, dLoading/operating conditions. Relevant material properties.
; _& l" a" E) e* h# {/ o9 R$ y  RShort-term loading. Stress-strain behavior.
2 I* X3 Z$ ]) A  W" c% jLong-term loading. Creep and stress relaxation.
  H! Q: j4 f' d  M  O+ p; ?' a% wRepeated loading. Fatigue.
$ {" X5 J& @- RHigh velocity and impact loading. Impact strength.
! v& J; X9 k* n8 DLoading at extreme temperatures. Thermal mechanical behavior.
Stress-strain behavior
! a( N# u1 R# }+ IPart strength
" E& _: g& m2 H+ l" k+ yThe stress-strain behavior of a material determines the material contribution to part strength (or
stiffness), the relationship between load and deflection in a plastic part. Other factors that affect part
1 S$ J& r! g8 D; v7 m* sstrength include part geometry, loading, constraint conditions on the part, and the residual stresses
and orientations that result from the molding process. There are various types of strength, such as
$ |' Z& f- {) ~( E+ Utensile, compressive, torsional, flexural, and shear, depending on the load and restraint conditions
( t" `) {' {/ W6 f& Mthe part is subjected to. These types also correspond to the primary load state present in the part. The
stress-strain behavior of the material in the same mode as the primary load state in the part is most
" J; I) B' F5 S# xrelevant in determining part strength.

bidededede

好资料...
收下了...

qian_chen4321

就这么点,还有其它的吗,有 的话,我们可以多多交流一下.

deardog

多来些模具英文方面的文章，谢谢