往链点点通www.WL566.com
systems may exist for a particular crystal structure; the number of independent slip systems
represents the different possible combinations of slip planes and directions. For example, for face-centered cubic, there are 12 slip systems: four unique {111} planes and, within each plane, three independent {110} directions. The possible slip systems for BCC and HCP crystal structures are listed in Table 8.1. For each of these structures, slip is possible on more than one family of planes (e.g.,{110},{211}, and {321} for BCC). For metals having these two crystal
structures, some slip systems are often operable only at elevated temperatures. 9.32 Fmax =27589N
Fmin =-1555N
9.35 (a)
Stress Amplitude (MPa)
300250200150100500100001000001E+061E+071E+081E+09Cycles to failure(b) 193MPa
(c) at 230Mpa, 5*105, 175Mpa, very high N values. (d) N=2*105, 240Mpa, N=6*106, 210Mpa. 9.36 (a) 250 Mpa, 9.5*104/750=127(min)
(b) 215 MPa , 2.8*106/750=373(min) (c) 200 MPa , 1.1*107/750=14667(min) (d) 150 Mpa . ?
9.38 (a) Polystyrene, 11Mpa; Cast iron, 193MPa
往链点点通www.WL566.com
往链点点通www.WL566.com
(b) PET, 15Mpa; Cast iron, 100MPa 9.39 Decrease the mean stress.
Increasing fatigue performance by imposing residual compressive stress within a thin surface layer. Case hardening. 12.11 (a)v=380m/s
(b)t=6.5789×10-5s 12.12 ζ=9.6×10-2C/V·m·s 12.13 Eζ=nqv 12.14 μ= 3.03×10-3m/s 12.20 ρ=π×10-8 12.21 Ge
n/n’ =5.56×10-10 Si
N/n’=2.625×10-13
12.25 CdSe、Si、TeZn、ZnSe、GaAs半导体 12.30 n=2.23×1022 12.33 μe=0.5,μh=0.021 12.34
metal:ζ=nqab/(aT-3/2+bT3/2) intrinsic:ζ=ζ0exp(-Ec/kT)
12.35
ζ
12.37
T1=327.9K
12.38
Ec=0.73eV
12.51 D=4.7625×10-12m2/s 17.2、 T2=120℉ 17.3、 Cp见表4-12
Al:900J/(kg?K)
往链点点通www.WL566.com
T1=3.1×10
-14
往链点点通www.WL566.com
Silver:235J/(kg?K) Tungsten:138J/(kg?K) 70Cu-30Zn:375 J/(kg?K)
17.4、 (a)Cv1=3.75J/mol-K
(b)Cv=24.942J/mol-K
17.5、 Θd=135K
17.6、 Cv=12π4R/5(T/Θd)3 T↑,Cv↑
Cv,m=3RfD(Θe/T) 积分结果在高温为常数
17.9、 ⊿l=-0.00936m 17.10、 α=2.5×10-5 17.12、 (a)ρ1/ρ2=0.952 17.16、 (a)Q=1.038×106A
(b)Q=9.342×108 (c)Q=3.06×107 (d)Q=4.67×108
17.23、 (a)纯银
(b)熔融SiO2 (c)LLPE (d)isotactic PP
17.25、 Al:DT=0.1013
Steel:DT=0.0132 Al2O3:DT=0.0321 Glass:DT=8.10×10-4 PS:DT=1.06×10-4 PA66:DT=1.26×10-4
18.1、 (a)H=10000A/m
(b)B0=4π×10-3A/m (c)B=0.01256tesla (d)M=1.81A/m 18.6、 (a)μ=0.0012645H/m
往链点点通www.WL566.com
往链点点通www.WL566.com
(b)μr=1006 χm=1005 18.7、 (a)χm=6400
(b)μr=6401
μ= 2.56π×10-3H/m (c)B= 0.402tesla 18.8、 (a)Ms =1.45×106A/m
(b)Bs =1.822tesla
18.9、 Ms= 1.733×106A/m 18.10、 Ms=6.05×105A/m
Ms= 6.05×105 X=1.87
18.15、 Ms= 3.2×104 Bs= 0.0402tesla 18.16、 Ms=5.6×105 x=4.6 19.3、 γ= 5×1014
E= 3.31×10-19J
19.9、 μr=0.9999757
n=1.43
v= 2.10×108m/s
19.13、 soda-lime glass:R=0.0347
Pyrex glass:R=0.03615 periclase:R=0.0729 spinol:R=0.07 PS:R=0.05325 PP:R=0.03873
19.16、 λ1= 1.116×10-6m
λ2= 1.849×10-6m
19.17、 λ(max)= 5.48×10-7m
往链点点通www.WL566.com
往链点点通www.WL566.com
19.19、 IT= 0.81I0 19.21、 l=0.0672m 19.24、 R=8.427×10-6
往链点点通共享资源 ----------------------------- 资料说明 ----------------------------- 该资源由往链点点通搜索于网络公开资源,仅供网友浏览阅读,请勿用于商业用途; 往链点点通,是免费的新一代电脑管理、网络应用桌面软件。 通过简洁清爽并可随意切换的两种窗口操作界面,构建了用户、电脑、互联网之间顺畅的入口平台。为用户管理电脑、智能办公、快捷上网、玩转应用(如 游戏,),提供全方位一站式的服务。让用户只需通过往链点点通,就能便捷到达信息时代的各个角落。真正实现一键直达,点点就通。 往链快搜索:无论是搜索硬盘资源、查找网络资源,还是追踪热门应用,都能享受前所未所的快速度。如本地文件搜索,千万文件,零秒呈现;如网络搜索,只需输入一次关键词,便能同步打开百度、google等多个搜索引擎的结果页; 往链优应用:与某些软件相比,往链点点通追求绿色无广告的体验,精选最优质的网络应用,为用户提供纯净实在的生活、工作、学习、娱乐、休闲应用空间。 往链点点通,让您用windows的使用习惯享受苹果的操作体验! 查看和分享更多优质资源,请进入www.WL566.com 下载往链点点通,找到您的一切网络所需! 往链网址导航大全 www.www321.com 往链点点通,让您无障碍畅游网络世界!
往链点点通www.WL566.com