Test Background
Structural sandwich is a composite structure of plate and shell structure. Its two surfaces are made of very thin plates, with a lighter sandwich layer sandwiched in the middle. The former is called the dashboard and requires high strength; the latter is called the sandwich and requires light weight. General structural interlayers are used for wings, tails, fuselages, rocket bodies, arrowheads, speed brakes, engine nacelles, sound insulation devices, fire partitions, etc.
The shear performance test of sandwich structural materials can measure the plane shear strength and plane shear modulus of the sandwich structure or core sample.
Zhongke Testing Reliability Experiment Center has the capability of reliability testing of various sandwich structures and provides professional shear performance testing services for sandwich structures.
Scope of tests
sandwich structure dashboard include aluminum alloy, stainless steel, titanium alloy and various composite materials.
Sandwich materials include lightweight wood, foam plastic, etc. Metal materials or composite materials can also be used to make corrugated board sandwich or honeycomb sandwich (see honeycomb structure).
Test method
By applying tensile or compressive load to the metal loading block bonded to the sample, plane shear is produced on the core along the direction of the sandwich structure panel, thereby measuring the plane shear strength of the core.
When the deformation meter is installed and the relative displacement of the two panels or two loaded steel plates is measured, the plane shear modulus of the core can be measured.
Test standard:
GB/T 1455-2022 Test method for shear performance of sandwich structures or cores
GB/T 1446 General principles for performance test methods of fiber reinforced plastics
GB/T 1464 Sandwich structure or core density test method
GB/T 3961 Fiber reinforced plastic terminology
