Composite Airframe Life Extension (CALE) | Apply Online

Composite Airframe Life Extension (CALE) Grant Opportunity FAQs

What is the Composite Airframe Life Extension (CALE) opportunity?

CALE was a U.S. Air Force Research Laboratory (AFRL) research and development effort focused on extending the certified service life of Air Force aircraft that rely on advanced composite materials in their primary structure.

What problem was CALE trying to solve?

CALE targeted the challenge that composite structures age differently than traditional metallic structures, and that the standard recertification or life-extension approach for composites can be costly and slow.

Why are composite airframes harder to recertify or life-extend than metal airframes?

The opportunity description emphasizes that composites have different aging behavior compared to metals, and that proving continued structural integrity can require time-consuming and expensive approaches when using traditional composite certification and re-certification methods.

What costly burdens was CALE aiming to avoid?

CALE sought ways to avoid two major burdens: (1) widespread replacement of aging composite structures with newly manufactured parts, and (2) repeating the extensive "building block" test-and-demonstration process typically used to prove composite airframe structural integrity from coupon tests up through full-scale components.

What is the "building block" test-and-demonstration process referenced in the opportunity?

As described, it is a composite structural integrity validation approach that progresses from simpler tests (such as coupon-level testing) to more complex demonstrations (up through full-scale components). CALE aimed to reduce the need to repeat this entire process for life extension decisions.

What was the main technical goal of CALE?

The main technical goal was to identify, develop, demonstrate, and validate technologies that help Air Force structural integrity managers make safe and defensible decisions about how long composite primary structures can remain in service, including potential extended service life.

Who would use the outcomes of CALE?

The opportunity is framed around supporting Air Force structural integrity managers by providing validated technologies and approaches they can use to make life-extension decisions for composite primary structures.

What types of properties or performance factors did CALE focus on predicting or assessing?

CALE emphasized methods to determine or predict key lifecycle properties of composite airframes across the original certified service life and, where needed, an extended service life. These included residual strength, durability, damage tolerance, and overall reliability.

What does "residual strength" mean in the context of CALE?

Residual strength was described as how much load-carrying capacity remains after aging and damage.

What does "durability" mean in the context of CALE?

Durability was described as how the structure holds up under repeated operational use and environmental exposure.

What does "damage tolerance" mean in the context of CALE?

Damage tolerance was described as how flaws, impacts, delaminations, or barely visible impact damage affect safety and the growth of damage over time.

What does "reliability" mean in the context of CALE?

Reliability was described as confidence and statistical assurance in continued safe operation.

What kinds of methods or approaches did CALE intend to advance?

Based on the description, CALE intended to improve measurement, modeling, prediction, and validation approaches for aging composite structures operating in real-world conditions, with the goal of enabling credible life-extension decisions.

What was the funding opportunity number for CALE?

The Funding Opportunity Number was BAA RQKPD 2015 0001.

How was the opportunity categorized?

It was categorized under Science and Technology and other Research and Development.

What funding instruments were available under CALE?

The opportunity listed Cooperative Agreements and Procurement Contracts as available funding instruments. This indicates awards could be structured as collaborative assistance agreements or as procurement-oriented contracts depending on the work and deliverables.

How many awards were anticipated?

The program anticipated making about 15 awards.

What was the estimated total program funding level?

The estimated total program funding level was approximately $30,036,000.

Was cost sharing or matching required?

Yes. A cost sharing or matching requirement applied, meaning awardees were expected to contribute a portion of the total project cost through cash, in-kind support, or other allowable forms, as defined in the full solicitation.

Who was eligible to apply?

Eligibility was listed as unrestricted, effectively open to any type of applicant entity (for example, companies, universities, nonprofits, or other organizations), subject to any additional eligibility clarifications contained in the full announcement text.

What is the CFDA number associated with CALE?

The opportunity was associated with CFDA number 12.800, the Air Force Defense Research Sciences Program.

What does CFDA 12.800 indicate about the program area?

It aligns the opportunity with defense-focused basic and applied research activities intended to advance Air Force capabilities.

When was the CALE opportunity posted?

The opportunity was originally posted on June 1, 2015.

What was the closing date for the CALE opportunity?

The closing date was April 9, 2018.

When was the opportunity archived?

The archive date was May 9, 2018.

Who was the point of contact listed for administrative or access issues?

The listed point of contact was Ryan Huffman, Contract Negotiator.

How could the point of contact be reached?

Ryan Huffman was reachable by phone at 937-713-9927 for administrative or access issues related to obtaining the full announcement.

What types of aircraft structures were in scope for CALE?

The focus was on aircraft that rely on advanced composite materials in their primary structure, with an emphasis on composite primary structures and their lifecycle behavior.

What was the practical intent of CALE for Air Force operations?

In practical terms, CALE was intended to build the technical foundation and validated tools needed to manage composite airframe life with confidence similar to that historically achieved for metal structures, without forcing large-scale part replacements or multi-year recertification campaigns.

What kind of decision-making did CALE aim to support?

CALE aimed to support safe, defensible life management and life extension decisions by improving the ability to measure, model, predict, and validate the condition and performance of aging composite structures in operational conditions.