结论：1. 运用有限元数值仿真对聚乙烯木塑复合材料胶接接头进行应力分布

Conclusion: <br>1. Use finite element numerical simulation to analyze the stress distribution and strain of polyethylene wood-plastic composite adhesive joints. At the same time, use the elastic-plastic finite element method to perform the numerical value of the three elastic modulus adhesives. The simulation shows that the high-modulus epoxy adhesive has the largest peak stress at the joint end, and the low-modulus acrylate adhesive has the smallest stress peak at the joint end. <br>2. When the Von Mises equivalent stress of the single-lap adhesive joint of epoxy resin adhesive gradually increases with the external load, the peak stress is linearly distributed. <br>3. The strain amount in the X direction of the three adhesives under the action of 32KN can be obtained. The epoxy resin adhesive has the largest horizontal strain, the worst stress distribution effect, the best bonding strength, and is not easy to crack. ; Acrylic has the smallest strain, the peak stress decreases with the increase of the end distance, and the strength of the bonding performance decreases. <br>4. The stress distribution of glued joints is closely related to the elastic modulus and external load value of the adhesive. <br>5. The application of finite element numerical simulation to polyethylene thermoplastic composites is feasible and provides a scientific basis for the design of bonded structures.

Conclusion:<br>1. The stress distribution and strain analysis of polyethylene wood plastic composite joints are carried out by using finite meta-numerical simulation, while the three elastic mods of adhesives are used to simulate the numerical value of the adhesives of three elastic mods, the joint end of the epoxy adhesive with high volume is the highest stress peak, and the joint end of the low-volume acrylic adhesive has the minimum stress peak.<br>2. The stress peak is linearly distributed when the effect forces such as Von Mises of the single-matching adhesive joint of epoxy adhesive increase with the external load.<br>3. The X-direction variables of the three adhesives under the action of 32KN force can be obtained, the level strain of epoxy resin adhesive joints is the largest, the stress distribution effect is the worst, the bonding strength is the best, not easy to crack;<br>4. The stress distribution of the glue joint is closely related to the elastic mod of the adhesive and the size of the outer load value.<br>5. The application of finite numerical simulation to polyethylene thermoplastic composite materials is feasible and provides a scientific basis for the design of the glue structure.

Conclusion<br>one The finite element method was used to analyze the stress distribution and strain of polyethylene wood plastic composite adhesive joint, and the elastic-plastic finite element method was used to simulate the adhesive joint with three kinds of elastic modulus. The results show that the peak stress of high modulus epoxy resin adhesive joint is the largest, and that of low modulus acrylate adhesive joint is the smallest .<br>2. When the von Mises equivalent stress of epoxy adhesive single lap joint increases with the external load, the stress peak value presents a linear distribution.<br>3. The x-direction strain of the three adhesives under the action of 32KN force can be concluded that the horizontal strain of epoxy adhesive bonded joint is the largest, the stress distribution effect is the worst, the bonding strength is the best, and it is not easy to crack; the strain of acrylate is the smallest, the peak stress decreases with the increase of end distance, and the bonding strength decreases.<br>4. The stress distribution of adhesive joint is closely related to the elastic modulus of adhesive and the value of external load.<br>5. It is feasible to apply finite element numerical simulation to polyethylene thermoplastic composites, which provides scientific basis for the design of bonding structure.<br>