Shear Strength Testing

Scope

Shear strength testing covers the determination of shear properties – ultimate shear strength and, in some methods, shear modulus and shear stress-strain behavior – across metals, fasteners, adhesives, composites, ceramics, and other materials, using the test configuration appropriate to the material and application.

The main method families within the scope include:

• Fastener and pin shear – single and double shear testing of bolts, pins, and rivets to determine their shear strength (e.g., ASTM B565, ASTM F606)
• Adhesive shear – lap shear (ASTM D1002, D3163, D3165, D5868), block shear (ASTM D4501), pin-and-collar (ASTM D4562), and thick-adherend methods (ASTM D5656, D3983) for bonded joints
• Composite shear – short-beam/interlaminar shear (ASTM D2344), V-notched Iosipescu (ASTM D5379), V-notched rail (ASTM D7078), and in-plane shear (ASTM D3518) for polymer-matrix and fiber-reinforced composites
• Sandwich core shear – core shear properties of sandwich construction (ASTM C273)
• Punch shear – punch-type shear of plastics and sheet (ASTM D732)
• Shear modulus – shear modulus of structural materials (ASTM E143) and dynamic methods (resonance/impulse)
• Bulk solids and rubber – Jenike and Schulze shear cell flow properties (ASTM D6128, D6773) and rotorless shear rheometry (ASTM D6204)
• Materials covered – metals and alloys, fasteners, adhesives, polymers, composites, ceramics, sandwich structures, bulk solids

Applications

• Fastener qualification – verifying the shear strength of bolts, pins, and rivets against their grade or specification, particularly in aerospace and structural applications
• Adhesive bond evaluation – measuring the shear strength of bonded joints for adhesive selection, joint design, and quality control
• Composite characterization – determining interlaminar and in-plane shear properties of composites, which govern their performance in structural use
• Structural design and verification – generating shear strength data for the design and analysis of joints, fasteners, and structural members
• Material qualification and selection – comparing materials and confirming they meet shear strength requirements for an application
• Quality control – verifying batch-to-batch consistency of shear strength for materials, fasteners, and bonded assemblies
• Failure investigation – determining whether inadequate shear strength contributed to a joint, fastener, or material failure
• Bulk solids handling – characterizing the shear/flow behavior of powders and bulk solids for hopper and process design

Benefits

• Measures a governing design property – for transversely loaded fasteners, bonded joints, and composites, shear strength is often the controlling property, and these methods provide it directly
• Right method for each material – the family of methods means the test can be matched to the material and loading configuration, giving results that reflect real service conditions rather than a forced one-size-fits-all geometry
• Supports joint and fastener verification – shear data confirms that fasteners, adhesives, and joints meet their requirements, underpinning qualification and acceptance
• Characterizes composites where shear governs – interlaminar and in-plane shear are common composite failure modes, and these tests provide the data needed for composite design
• Standardized and comparable – run to recognized ASTM (and other) methods, results provide a consistent basis for material comparison, specification, and quality control
• Broad material coverage – one capability addresses metals, adhesives, composites, ceramics, sandwich structures, and bulk solids