initial commit / add all books

10 files changed, 91 insertions, 0 deletions

diff --git a/3257/CH2/EX2.1/Ex2_1.sce b/3257/CH2/EX2.1/Ex2_1.sce
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+// Calculation of ultimate tensile strength 

+clc

+K = 689655  // in kPa

+n = 0.5 

+A0 = 1 // let

+printf("\n Example 2.1")

+sigma = K*n^n

+A_neck = A0*exp(-n)

+P= sigma*A_neck

+UTS = P/A0

+printf("\n True ultimate tensile strength is %.2fkPa",sigma)

+printf("\n Engineering UTS of material is %.2f kPa",UTS)

+// Answer in book is 295521.79 kPa

+

diff --git a/3257/CH2/EX2.1/Ex2_1.txt b/3257/CH2/EX2.1/Ex2_1.txt
new file mode 100755
index 000000000..2dcd1321b
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+ 

+ Example 2.1

+ True ultimate tensile strength is 487659.73kPa

+ Engineering UTS of material is 295780.58 kPa 
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diff --git a/3257/CH2/EX2.3/Ex2_3.sce b/3257/CH2/EX2.3/Ex2_3.sce
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index 000000000..48b9448f9
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+++ b/3257/CH2/EX2.3/Ex2_3.sce
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+// Calculation of modulus resilience from hardness

+clc

+h = 400 // hardness of specimen in HB

+E = 205e3 // Youngs modulus of steel in MPa

+g = 9.8 // gravitational acceleration in m/s^2

+printf("\n Example 2.3")

+Y = h*1e6*g/3 //   As, Hardness = c*Y 

+m_r = (Y/1e6)^2/(2*E) // modulus of resilience

+

+printf("\n Modulus of resilience of body is %.2f Nm/m^3.", m_r)

+// while numerical value of answer in book is 4.17

+

diff --git a/3257/CH2/EX2.3/Ex2_3.txt b/3257/CH2/EX2.3/Ex2_3.txt
new file mode 100755
index 000000000..0277c593e
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+++ b/3257/CH2/EX2.3/Ex2_3.txt
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+

+ Example 2.3

+ Modulus of resilience of body is 4.16 Nm/m^3. 
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diff --git a/3257/CH2/EX2.4/Ex2_4.sce b/3257/CH2/EX2.4/Ex2_4.sce
new file mode 100755
index 000000000..a067740d1
--- /dev/null
+++ b/3257/CH2/EX2.4/Ex2_4.sce
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+// Elimination of stress by tension

+clc

+sigma_t = 140 // in MPa

+sigma_c = -140 // in MPa

+l = 0.25 // length of specimen in m

+Y = 150 // yield stress of material in MPa

+E = 70 // Youngs modulus in GPa

+printf("\ Example 2.4")

+epsilon_tot = (sigma_c*1e6)/(E*1e9)  + Y*1e6/(E*1e9)  // total strain

+l_f = l*exp(epsilon_tot)

+

+printf("\n Stretched length should be %0.4f m",l_f)

+// Numerical value of answer in book is 0.2510

+

diff --git a/3257/CH2/EX2.4/Ex2_4.txt b/3257/CH2/EX2.4/Ex2_4.txt
new file mode 100755
index 000000000..f3fa125a6
--- /dev/null
+++ b/3257/CH2/EX2.4/Ex2_4.txt
@@ -0,0 +1,2 @@
+  Example 2.4

+ Stretched length should be 0.2500 m 
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diff --git a/3257/CH2/EX2.5/Ex2_5.sce b/3257/CH2/EX2.5/Ex2_5.sce
new file mode 100755
index 000000000..91dfe23c0
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+++ b/3257/CH2/EX2.5/Ex2_5.sce
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+// Yielding of a thin walled shell

+clc

+r = 254 // radius in mm

+t = 2.54 // thickness in mm

+sigma_1 = 140 // stress in MPa

+sigma_2 = 140 // stress in MPa

+sigma_min = 0 // stress in MPa

+printf("\ Example 2.5")

+Y = sigma_2 - sigma_min

+p = 2*(t/1e3)*Y/(r*1e-3)

+printf("\n\n According to maximum shear stress criterion, Required pressure is %.1f MPa",p)

+Y =  sqrt(0.5*(sigma_1^2+sigma_2^2))

+p = 2*(t/1e3)*Y/(r*1e-3)

+printf("\n\n According to maximum distortion energy criterion, Required pressure is %.1f MPa",p)

+

+

diff --git a/3257/CH2/EX2.5/Ex2_5.txt b/3257/CH2/EX2.5/Ex2_5.txt
new file mode 100755
index 000000000..9c8488de6
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+  Example 2.5

+

+ According to maximum shear stress criterion, Required pressure is 2.8 MPa.

+

+ According to maximum distortion energy criterion, Required pressure is 2.8 MPa.
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diff --git a/3257/CH2/EX2.8/Ex2_8.sce b/3257/CH2/EX2.8/Ex2_8.sce
new file mode 100755
index 000000000..e6b30d838
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+// Temperature rise in simple deformation

+clc

+d = 25 // diameter of cylinder in mm

+h_i = 25 // Height of cylinder in mm

+cp = 1255 // specific heat capacity in J/kg.K

+rho = 2768 // density in kg

+del_t = 55 // temperature change in K

+K = 104 // in MPa

+n = 0.5

+printf("\n Example 2.8")

+v = %pi/4*(d*1e-3)^2*h_i*1e-3 // volume of cylinder

+H = cp*rho*v*del_t // heat in Joule

+

+epsilon = (H/(v*K*1e6/(n+1)))^(1/(n+1))

+h_f = h_i/exp(epsilon)

+

+printf("\n Final height of specimen is %.1f mm",h_f)

+

diff --git a/3257/CH2/EX2.8/Ex2_8.txt b/3257/CH2/EX2.8/Ex2_8.txt
new file mode 100755
index 000000000..4a6331e4d
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+++ b/3257/CH2/EX2.8/Ex2_8.txt
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+ 

+ Example 2.8

+ Final height of specimen is 3.5 mm.
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