Aluminum sheet tensile testing is a standard method for evaluating its mechanical properties, such as strength and ductility. The specific steps are as follows:

‌1、 Sample preparation‌

1. ‌Cut the sample‌Cut standard specimens (usually dumbbell shaped or rectangular bars) from aluminum sheets, with dimensions that meet the requirementsGB/T 228.1-2021Waiting for standard requirements.

2. ‌surface treatment‌Remove burrs and scratches to ensure a smooth and defect free surface.

3. ‌measure dimensions‌Accurately measure the original gauge length of the sample with a vernier caliper（L0L0）And cross-sectional area（S0S0）.

‌2、 Equipment preparation‌

1. ‌Selection of testing machine‌：

• Room temperature testing: hydraulic universal testing machine or electronic universal testing machine.

• High temperature testing: equipped with a universal testing machine with a high-temperature furnace (temperature needs to be uniformly controlled).

2. ‌Fixture installation‌：

• Use wedge-shaped or pneumatic fixtures to clamp the specimen, ensuring symmetrical force distribution and slip resistance.

3. ‌Calibration of extensometer‌：

• Install a contact extensometer on the parallel section of the specimen for precise measurement of deformation.

‌3、 Experimental parameter setting‌

1. ‌rate control‌(Select based on testing objectives):

• ‌Yield strength test‌The strain rate is controlled within0.001–0.005/min(Method)A1/A2）Or stress rate≤300 MPa/min(Method)B）.

• ‌Tensile strength test‌: Strain rate0.02–0.2/min2.

• If only tensile strength is required, the rate can be set to5 mm/min(Normal speed).

2. ‌temperature control‌：

• Room temperature test: ambient temperature10–35℃(Standard requirements)23±5℃）.

• High temperature testing: Thermocouples monitor the surface temperature of the sample in real-time.

‌4、 Testing process‌

1. ‌Clamp the sample‌Fix the sample vertically in the fixture to avoid deviation or preloading.

2. ‌Start testing‌：

• Slowly apply tension and record the load in real-time-Displacement curve.

• After the yielding stage is completed, the extensometer can be removed (to prevent damage).

3. ‌Continuous loading‌Until the specimen fractures, record the maximum load（FmFm）And the instantaneous displacement of the fracture.

‌5、 Data recording and analysis‌

1. ‌Calculation of key indicators‌：

• ‌yield strength‌（ReRe）：the first timeStress value before descent.

• ‌tensile strength‌（RmRm）：Rm=Fm/S0Rm=Fm/S0.

• ‌Elongation after fracture‌（AA）：A=[(Lu−L0)/L0]×100%A=[(Lu−L0)/L0]×100%（LuLuFor the post break gauge distance.

2. ‌Result verification‌Check the position of the fracture (it should be within the parallel section), otherwise the result is invalid.

‌6、 Precautions‌

• ‌Sample clamping‌To avoid slipping or local stress concentration, wedge-shaped fixtures need to be regularly inspected for wear.

• ‌environmental control‌Error in furnace temperature uniformity during high temperature testing≤±2℃.

• ‌data integrity‌Simultaneously record multiple parameters such as load, displacement, temperature, etc.

Note: If high-temperature stretching is required (such as≥100℃）It is necessary to use a dedicated high-temperature furnace and pre-set the sample insulation time (usually≥20Minutes). Testing of thin materials such as aluminum foil requires adjusting the sensitivity of fixtures and extensometers.