A stress of 1000 psi is applied to a polymerthat operates at a constant strain; after sixmonths, the stress drops to 850 psi. For aparticular application, a part made of thesame polymer must maintain a stress of900 psi after 12 months. What should bethe original stress applied to the polymerfor this application?

Question
Asked Jan 4, 2020
6 views

A stress of 1000 psi is applied to a polymer
that operates at a constant strain; after six
months, the stress drops to 850 psi. For a
particular application, a part made of the
same polymer must maintain a stress of
900 psi after 12 months. What should be
the original stress applied to the polymer
for this application?

 

check_circle

Expert Answer

star
star
star
star
star
1 Rating
Step 1

Given data as per question

Stress applied on the polymer = 1000psi

After six-month stress drop = 850 psi

Writing expression for the stress in a polymer after t time.

Mechanical Engineering homework question answer, step 1, image 1
fullscreen
Step 2
Mechanical Engineering homework question answer, step 2, image 1
fullscreen
Step 3
Mechanical Engineering homework question answer, step 3, image 1
fullscreen

Want to see the full answer?

See Solution

Check out a sample Q&A here.

Want to see this answer and more?

Solutions are written by subject experts who are available 24/7. Questions are typically answered within 1 hour.*

See Solution
*Response times may vary by subject and question.
Tagged in

Engineering

Mechanical Engineering

Solid Mechanics

Related Mechanical Engineering Q&A

Find answers to questions asked by student like you
Show more Q&A
add
question_answer

Q: the W14 x 43 simply supported beam is made of A-36 steel and is subjected to the loading shown where...

A: Click to see the answer

question_answer

Q: I need help solving these 3 simple parts, if you can not answer all 3 parts then please leave it for...

A: In geometric dimensioning & tolerance (GD&T), a feature control frame is applied to define t...

question_answer

Q: What is the major difference between valves used in hydraulic systems and those used in pneumatic sy...

A: Hydraulic system: The hydraulic system is a device used to convert the pressure of fluid mainly oil ...

question_answer

Q: 35. (SI units) Zinc has a density of 7.15 g/cm3 at room temperature (20°C). Determine its density at...

A: Click to see the answer

question_answer

Q: I need answers for questions 10, 11, and 12.

A: 10.The given drawing is an assembly of two parts along with some bushing which are shown by the hatc...

question_answer

Q: A weight W = 905 lb is held up by two cables each with a diameter of 1.5 in. Determine the tension i...

A: Let the tension developed in the cable BC be T1 & in AC be T2.Drawing the FBD of the above diagr...

question_answer

Q: Two blocks joined by a single pin are subjected to a pulling force of P = 250 Ib. The pin has a diam...

A: Since you have posted a question with multiple sub-parts, we will solve the first three subparts i.e...

question_answer

Q: How many auxiliary views are found on this print?

A: Some objects are too complex that do not show the best geometry of the part by three principle view....

question_answer

Q: Specifically a Statics problem. Determine the moment of inertia of the shape (a=15 mm) with respect ...

A: By applying composite areas concept.The moment of inertia of the given figure is calculated as: