5.1.4 Non-Planar Substrates

Mitigating stresses is more challenging when bonding with non-planar substrates. Angles created by non-planar substrates can lead to counterintuitive solutions, as the expected forces may not stress the joint as expected. It is important to choose the most suitable joint for the application based on the types of stresses acting on the bonded joints; in other words, forces and stresses should be considered first, with the joint designed around the expected forces and stresses. Particularly with right angles (90° angles), peel forces may impact the assembly in unanticipated areas. As discussed in Section 4, it is crucial to avoid peeling cleavage forces, as these are the most common forces that lead to failure. Figure 117 shows some of the most common peeling loads in non-planar assemblies and some possible design solutions to change the type of stress. This is not a comprehensive list, but rather a representative sample of the most common peel forces.

Figure 117 Peeling loads and their conversion by design measures
PEELING CLEAVAGE LOAD POSSIBLE DESIGN SOLUTIONS

Table of contents

+33,000
professionals

have already
signed up

Award winning manual

Platinum Award for LOCTITE®X Digital Manual

The Digital Manual is for professionals by professionals

The manual is made entirely for you. However, if you’re still not convinced that free industry knowledge is for you, take a look at these user testimonials from the users of the manual.

"The topics are such that I can help take design related decisions very well at work. It's an interesting and knowledgeable read, I recommended my other colleagues to have a look at the manual as well."

Hanumant, Production Incharge

"The manual's chapters significantly enhanced my comprehension of various engineering topics. The manual adeptly presents explanations and examples of concepts, showcasing a high level of clarity and effectiveness in its content."

Tejas, Mechanical Engineer from a renowned Engineering College

"The release of this manual by a renowned brand such as Loctite has proven to be highly motivating for students. Its authentic content serves as a source of inspiration, encouraging students to engage actively in reading and learning."

Padmakar Deshmukh, Professor at an Engineering College