The loading speed of tensile test is 1mm/min, record the corresponding displacement load curve, connect the inductor, and use YJY-13B extensometer to record the corresponding load deformation curve for in-plane tension. The recorded load deformation curve is converted into the corresponding stress strain curve through calculation, and the overall tensile elastic modulus and tensile strength of the composite are obtained.
(2) The loading speed of compression test is 0.5mm/min, and the corresponding displacement load curve is recorded at the same time. The loading end of the compression test is a cylinder with a diameter of 80mm. The sample is placed in the center of the cylinder, and the force is applied to the sample by moving the beam of the testing machine up and down. The recorded load deformation curve is converted into the corresponding stress strain curve to obtain the compressive elastic modulus and compressive strength of the composite.
(3) The loading speed of bending test is 1mm/min. The specimen is used as a laminated beam to conduct a transverse three-point bending test, and the corresponding center displacement load curve is recorded at the same time. The recorded load deformation curve is converted into the corresponding stress strain curve through calculation, and the bending elastic modulus and bending strength of the composite are obtained.
(4) The loading speed of the shear test is 0.5mm/min, and the corresponding displacement load curve is recorded at the same time. Through calculation, the recorded load deformation curve is converted into the corresponding stress strain curve, and the shear strength of the composite is obtained.
4.3 Test results From the average value of in-plane material properties of continuous fiber reinforced composites measured in the test, it can be seen that the mechanical properties of continuous fiber reinforced FRP are significantly improved compared with those of chopped fiber reinforced FRP, and the in-plane tensile strength is more than twice as high as that of chopped fiber reinforced FRP. This is because the fiber as the FRP reinforcement material is the main load-bearing part of FRP. After continuous fiber reinforcement is adopted, the percentage content of fiber can be as high as 70%, while the fiber content of chopped fiber reinforced FRP is only about 40%. Of course, the mechanical properties of FRP are also related to other factors, such as the type of resin.

The non-metallic compensator is an important part of the circulating fluidized bed boiler. The quality of its device directly affects the sealing of the circulating fluidized bed boiler, and then affects the safe and stable operation of the boiler. Therefore, it is very important to study the non-metallic contraction joint device.
1. Structure and function of non-metallic contraction joint: non-metallic contraction joint, also known as non-metallic compensator, is mainly used to absorb the relative displacement of two components with relative displacement and seal the connection channel between two components with relative displacement.
The non-metallic compensator is composed of non-metallic skin, thermal insulation parts, metal flanges, rib plates, bolts and stainless steel mesh, ceramic fiber rope or pillow shaped sealing materials, etc. The skin is made of heat resistant rubber and glass cloth. The internal structures of non-metallic contraction joints at different parts are different. For example, there is a layer of polytetrafluoroethylene insulation film on the inner side of the skin. The insulation quilt is composed of aluminum silicate refractory fiber felt or rock wool wrapped with ceramic fiber cloth at the insulation part, and the insulation quilt is composed of aluminum silicate refractory fiber felt wrapped with glass ceramic fiber cloth at the insulation part.
The three-dimensional contraction direction of non-metallic contraction joints varies with the working position of non-metallic contraction joints. The design fatigue life of non-metallic contraction joints is generally 3000 times. The service life of the advanced non-metallic contraction joint is closely related to the seal design structure selected on the flue gas side of the furnace in addition to the selected data, which has been proved on the operating boiler.
2. Inspection before operation of non-metallic compensator: after the completion of the boiler device and before the commissioning of individual parts, a comprehensive inspection of non-metallic contraction joints should be stopped, mainly to check whether the temporary support and fixing parts can be removed, otherwise the normal displacement of non-metallic contraction joints will be affected.
Check whether the pillow seal data and skin inside the non-metallic compensator furnace are intact, to prevent high-temperature flue gas from flowing from inside to outside and burning non-metallic contraction joints. Check whether the non-metallic sealing gasket and bolt installed on the manhole door above the non-metallic contraction joint can be tightened and sealed tightly, so as to avoid the leakage of high-temperature materials from the sealing surface of each hole door to the outer skin of the non-metallic contraction joint and damage the outer skin of the non-metallic contraction joint. When there is no problem in the inspection, it can cooperate with the boiler host to stop the divisional test run.