Short answer

When designing joints for polymeric plates, prioritize using multiple bolts and consider increasing the overlap length to enhance tensile strength. Evaluate the specific benefits of bonding based on the intended application and material combination.

Field: Final Production
Source: Open Chemistry (2022)
Method: Experimental investigation
Evidence: Strong effect

Combining bolting with bonding in single-lap joints significantly enhances the tensile strength of polymeric plates, with improvements ranging from 20% to 56% depending on the material and configuration. This final production research insight is drawn from a 2022 study published in Open Chemistry. Using Experimental investigation, researchers explored how this design variable affects real-world outcomes. The key design takeaway: When designing joints for polymeric plates, prioritize using multiple bolts and consider increasing the overlap length to enhance tensile strength. Evaluate the specific benefits of bonding based on the intended application and material combination.

Study

Final ProductionHigh ImpactStrong effect

Hybrid Bolted-Bonded Joints Increase Polymeric Plate Strength by up to 56%

Open Chemistry · 2022

Key Findings

01Double-bolt connections performed 20–56% better than single-bolt connections, depending on the plate material.
02The adhesive had no significant effect on ultimate joint strength in this study.
03Increasing the overlap length generally increased joint strength.
04Double-bolted Delrin (POM) specimens exhibited the highest joint strength across all tested lap lengths.

Application

Design takeaway

How to apply

When designing or analyzing bolted joints in polymeric structures, consider the number of bolts and the lap length as primary factors for strength enhancement. If considering hybrid bonding, conduct preliminary tests with the specific materials and adhesive intended for use.

Project actions

01When testing joints, ensure consistent application of fasteners and adhesives.
02Document the exact material properties and dimensions of all components used in the joint.

Method & Evidence

AimTo experimentally determine the influence of bolting, bonding, and overlap length on the ultimate tensile strength of single-lap joints in various engineering plastics.

MethodExperimental investigation

ProcedureSingle-lap joints were created using four types of engineering plastics (HDPE, UHMWPE, Delrin, Teflon) with standard M6 bolts. Specimens were configured as single-bolted, double-bolted, single-bolted/bonded, and double-bolted/bonded, with lap lengths of 20, 40, and 60 mm. Tensile tests were conducted at a displacement rate of 2 mm/min, and load-extension graphs were analyzed to compare joint strengths.

ContextMaterials science and structural engineering of polymeric components.

Variables

IV["Joint type (single bolted, double bolted, single bolted/bonded, double bolted/bonded)","Lap length (20mm, 40mm, 60mm)","Polymer material (HDPE, UHMWPE, Delrin, Teflon)"]

DVUltimate joint strength (load-extension)

CV["Bolt size (M6)","Displacement rate (2 mm/min)","Adhesive type (Weicon RK-7100)"]

Strengths & Limitations

Strengths

+Systematic variation of key joint parameters.
+Direct experimental measurement of joint strength.

Limitations

The findings are specific to the tested polymers and adhesive. Results might vary with different materials, bolt sizes, or environmental conditions.

Reliability & validity

The study's validity is supported by systematic testing of multiple configurations and materials. Reliability would be enhanced by repeating tests for each configuration to ensure consistent results and calculating statistical measures like standard deviation.

Think critically

Given that the adhesive did not improve ultimate joint strength, under what conditions might bonding be beneficial for polymeric joints, and what factors could have influenced this outcome?

Design Principles

"Joint strength in polymeric components can be significantly improved by increasing fastener redundancy and overlap, though the efficacy of hybrid bonding requires specific material and adhesive validation."

This research provides critical data for designers and engineers selecting joining methods for polymeric components. Understanding how different joining strategies affect material performance under tensile load is essential for ensuring product durability and safety in applications ranging from consumer goods to structural components.

What This Means for Your Design

Using more bolts in a joint for plastic parts makes them much stronger, and making the overlapping part longer also helps. Adding glue didn't make these plastic joints stronger in this test, but it might in other situations.

How to use in your project

1.Reference this study when discussing the mechanical properties of different joint types for polymeric materials in your design project.

Add to My Project

Quick Cite

Paragraph starter

Experimental investigations into single-lap joints of polymeric plates reveal that increasing the number of bolts from one to two can enhance tensile strength by up to 56% (Dindar et al., 2022). While the addition of adhesive did not improve ultimate joint strength in this specific study, increasing the overlap length generally led to greater strength. This suggests that fastener redundancy and overlap are key design considerations for maximizing the load-bearing capacity of polymeric joints.

Source

Open Chemistry

Experimental investigation of single-lap bolted and bolted/bonded (hybrid) joints of polymeric plates

journal · 2022

View source

Questions About This Research

What does the research say about hybrid bolted-bonded joints increase polymeric plate strength by up to 56%?: When designing joints for polymeric plates, prioritize using multiple bolts and consider increasing the overlap length to enhance tensile strength. Evaluate the specific benefits of bonding based on the intended application and material combination. Evidence: Open Chemistry (2022).
Why does "Hybrid Bolted-Bonded Joints Increase Polymeric Plate Strength by up to 56%" matter for design?: This research provides critical data for designers and engineers selecting joining methods for polymeric components. Understanding how different joining strategies affect material performance under tensile load is essential for ensuring product durability and safety in applications ranging from consumer goods to structural components.
How can designers apply this research?: When designing joints for polymeric plates, prioritize using multiple bolts and consider increasing the overlap length to enhance tensile strength. Evaluate the specific benefits of bonding based on the intended application and material combination.
What were the main findings?: Double-bolt connections performed 20–56% better than single-bolt connections, depending on the plate material.. The adhesive had no significant effect on ultimate joint strength in this study.. Increasing the overlap length generally increased joint strength.. Double-bolted Delrin (POM) specimens exhibited the highest joint strength across all tested lap lengths.
What research method was used?: Experimental investigation.
How strong is the evidence?: Evidence strength is rated Strong effect, based on a 2022 journal from Open Chemistry.
What should I do differently in my next project?: When designing or analyzing bolted joints in polymeric structures, consider the number of bolts and the lap length as primary factors for strength enhancement. If considering hybrid bonding, conduct preliminary tests with the specific materials and adhesive intended for use.
What are the limitations?: The adhesive used did not enhance ultimate joint strength, which might be specific to the chosen adhesive and polymer combination. The study focused on single-lap joints, and results may differ for other joint configurations.