Chapter 4 Testing of Plastic Mechanical Properties
DATE：2020/1/8 8:55:03 / READ： / SOURCE：This station
Chapter 4 Testing of Plastic Mechanical Properties
Points to know
1.Understand the properties of tensile strength, flexural strength, impact strength, compressive strength, and hardness of plastic products.
Definition 2. Understand the significance of testing the tensile strength, flexural strength, impact strength, compressive strength and hardness of plastic products.
1.Master the measurement of mechanical properties such as tensile strength, flexural strength, impact strength, compressive strength and hardness of plastic products
Should point
Try the method. Learn the tensile strength and elongation at break, bending stress and deflection, impact strength, compressive strength and hardness results
2.Understand the performance testing process of tensile strength, flexural strength, impact strength, compression strength and hardness of plastic products.
data processing.
What are the influencing factors in each.
3. Write a complete experimental report of various performance tests.
Pre-Class Cognitive Practice
First, the teacher will explain the test standards and demonstrate the operation process in chapters, and then the students will perform plastic tensile strength.
Internship
Tests for properties such as degree, flexural strength, impact strength, compressive strength and hardness.
Plastic products tensile strength and elongation at break, bending stress and deflection, impact strength, compressive strength and hardness, etc.
2. Internship content
Test methods and calculation results of common mechanical properties, and write detailed test reports for each performance test.
(1) Grasp the test principle, sample preparation, test method, tensile strength and fracture of plastic mechanical tensile test
3. Purpose of the internship
Extension (2) Master the test principle, three-point bending test method and calculation method of bending stress and deflection rate of simple supported beam plastic bending test.
(3) Master the testing principles and methods of plastic impact test of pendulum simple supported beams and cantilever beams, and learn the gaps and
Degree results are calculated.
Results processing and calculation of impact strength of unnotched specimens. Grasp the test principle and results of the drop weight impact test.
(4) Master the test methods and results of Shore hardness, ball hardness and Rockwell hardness.
(5) Understand the difference and connection of mechanical properties between small and large samples through large and small sample tests.
(1) Equipment: Plastic mechanical tensile testing machine, prototype machine, bending testing machine, pendulum simple supported beam and cantilever beam
4. Demonstration equipment, materials and tools
Impact tester, drop hammer impact tester, compression tester, Shore hardness tester, ball hardness tester and Rockwell hardness tester
(2) Test material: plastic film or sheet for tensile test, plastic sample for bending test. Shock
Degree meter.
Plastic test specimens, compression test specimens, and hardness test specimens.
Points to know
1.Understand the properties of tensile strength, flexural strength, impact strength, compressive strength, and hardness of plastic products.
Definition 2. Understand the significance of testing the tensile strength, flexural strength, impact strength, compressive strength and hardness of plastic products.
1.Master the measurement of mechanical properties such as tensile strength, flexural strength, impact strength, compressive strength and hardness of plastic products
Should point
Try the method. Learn the tensile strength and elongation at break, bending stress and deflection, impact strength, compressive strength and hardness results
2.Understand the performance testing process of tensile strength, flexural strength, impact strength, compression strength and hardness of plastic products.
data processing.
What are the influencing factors in each.
3. Write a complete experimental report of various performance tests.
Pre-Class Cognitive Practice
First, the teacher will explain the test standards and demonstrate the operation process in chapters, and then the students will perform plastic tensile strength.
Internship
Tests for properties such as degree, flexural strength, impact strength, compressive strength and hardness.
Plastic products tensile strength and elongation at break, bending stress and deflection, impact strength, compressive strength and hardness, etc.
2. Internship content
Test methods and calculation results of common mechanical properties, and write detailed test reports for each performance test.
(1) Grasp the test principle, sample preparation, test method, tensile strength and fracture of plastic mechanical tensile test
3. Purpose of the internship
Extension (2) Master the test principle, three-point bending test method and calculation method of bending stress and deflection rate of simple supported beam plastic bending test.
(3) Master the testing principles and methods of plastic impact test of pendulum simple supported beams and cantilever beams, and learn the gaps and
Degree results are calculated.
Results processing and calculation of impact strength of unnotched specimens. Grasp the test principle and results of the drop weight impact test.
(4) Master the test methods and results of Shore hardness, ball hardness and Rockwell hardness.
(5) Understand the difference and connection of mechanical properties between small and large samples through large and small sample tests.
(1) Equipment: Plastic mechanical tensile testing machine, prototype machine, bending testing machine, pendulum simple supported beam and cantilever beam
4. Demonstration equipment, materials and tools
Impact tester, drop hammer impact tester, compression tester, Shore hardness tester, ball hardness tester and Rockwell hardness tester
(2) Test material: plastic film or sheet for tensile test, plastic sample for bending test. Shock
Degree meter.
Plastic test specimens, compression test specimens, and hardness test specimens.
Author：admin