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A bar of cross section is pulled aciallaxially. Each side of the bar is 10 mm amand the gauge length of the bar is 200 mm. The young modulus of rodrods material is 80 Gpa. The mamum elastic strain is 0.5%. Calculate the load required to achieve gauge length 210 mm for the following conditions: Condition 1: the bar is made of an ideal elasto plasticaterial. Condition 2: the strain hardening exponent of the material is 0.2 and strength coefficient is 1000 mpa.
Sagot :
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