A simply supported beam

Part 1 The simply suppeoted beam to be investigated is of rectangular box section, it is 150 mm wide by 250 mm deep having A constant wall thickness of 15mm and 8 m long This is shown on the attachment Work out R1 and R2 using relevant measurement data calculate the maximum bending stress for the beam in Mn/m^2 Part 2 A strut 3.5m long is of rectangular box section 20cm wide by 15cm deep having a constant wall thickness of 1.2cm. it is made from steel having a compressive yould strength of 320Mn/m^2 and youngs modulus E= 200N/m^2 Calculate the slenderness ratio and predict how the strut would be likely to fail when loaded in compression.

Mechanics of materials 2

Please explain strain hardening, on a microstructural level. Testing: Dislocation motion, interaction and multiplication

Mechanics of material 4

(See attached file for full problem description with proper equations) 4. True-False, You must justify your answer for full credit. a) Dislocations can appear in amorphous materials. b) A Voight model fully describes the mechanical behavior of most real polymers. c) The compliance of a testing frame is only important when one is testing a really compliant material. d) xx =  * xx e) Hole-drilling is a good way to fix a crack, because the hole adds compressive stresses to the crack tip.

Energy transfer in mechanical systems

A wheel is 800mm in diamiter and has a mass of 1000kg. on a horizontal surface without skidding, the vehicle accelerates uniformly at 0.5m/s^2 for 5 seconds. calculate the showings of all your workings to find the combined linear and kinetic energy of the wheel after the period of acceleration.

Combined angular/ linear motion

In reference to the attached file: A loaded coaltruck is parked at the top of an inclined track. it breaks free and rolls down the incline accelerating uniformly where it colides with ahother stationary coal truck parked at the begining of a 1 km strech of horizontal track. the pair lock together and continue along the track until they come to a standstill. the tractive resisting force acting on the truck at the top of the incline is 450N and on the combined pair when they are traveling as one is 750N. determine: 1 the potential energy of the stationary truck at the top of the incline. 2 the kinetic energy of the rolling truck at the bottom of the incline just before impact, and it... click for more